JP6656108B2 - Method and apparatus for treating radioactive liquid waste - Google Patents

Method and apparatus for treating radioactive liquid waste Download PDF

Info

Publication number
JP6656108B2
JP6656108B2 JP2016146904A JP2016146904A JP6656108B2 JP 6656108 B2 JP6656108 B2 JP 6656108B2 JP 2016146904 A JP2016146904 A JP 2016146904A JP 2016146904 A JP2016146904 A JP 2016146904A JP 6656108 B2 JP6656108 B2 JP 6656108B2
Authority
JP
Japan
Prior art keywords
adsorbent
waste liquid
radioactive
radioactive waste
adsorption
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2016146904A
Other languages
Japanese (ja)
Other versions
JP2018017565A (en
JP2018017565A5 (en
Inventor
亜由美 渡部
亜由美 渡部
祐子 可児
祐子 可児
浅野　隆
浅野　　隆
健司 野下
健司 野下
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi GE Nuclear Energy Ltd
Original Assignee
Hitachi GE Nuclear Energy Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi GE Nuclear Energy Ltd filed Critical Hitachi GE Nuclear Energy Ltd
Priority to JP2016146904A priority Critical patent/JP6656108B2/en
Publication of JP2018017565A publication Critical patent/JP2018017565A/en
Publication of JP2018017565A5 publication Critical patent/JP2018017565A5/ja
Application granted granted Critical
Publication of JP6656108B2 publication Critical patent/JP6656108B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Description

本発明は放射性廃液の処理方法及び処理装置に係り、更に詳しくは、放射性物質を含む廃液、地下水、海水、雨水などから放射性物質を除去する放射性廃液の処理方法及び処理装置に関する。   The present invention relates to a method and an apparatus for treating a radioactive waste liquid, and more particularly, to a method and an apparatus for treating a radioactive waste liquid for removing a radioactive substance from a waste liquid containing a radioactive substance, groundwater, seawater, rainwater, and the like.

原子力発電所等において発生する放射性物質を含む廃液の処理方法の一つに、吸着剤として無機固体およびイオン交換樹脂等を使用して、放射性物質を吸着除去する方法がある。この方法で使用される吸着剤は、放射性物質を吸着した後に放射性廃棄物として処理する必要があるので、吸着性能を向上させて処理効率を高めることが求められる。   One of the methods of treating a waste liquid containing a radioactive substance generated in a nuclear power plant or the like is a method of adsorbing and removing a radioactive substance by using an inorganic solid, an ion exchange resin or the like as an adsorbent. Since the adsorbent used in this method needs to be treated as radioactive waste after adsorbing radioactive substances, it is required to improve the adsorption performance and increase the treatment efficiency.

吸着剤の処理効率を高めるために、廃液の液性を規定範囲内に調整する方法がある（例えば、特許文献１参照）。具体的には、セレンを含有する排水からセレンを除去する方法に関し、希土類化合物を含む吸着剤に対して排水をｐＨ１．０以上４．５未満に調整して接触させる。排水のｐＨを調整することで、排水中から４価及び６価のセレンを効果的に吸着除去できる。   In order to increase the treatment efficiency of the adsorbent, there is a method of adjusting the liquid property of the waste liquid within a specified range (for example, see Patent Document 1). Specifically, the present invention relates to a method for removing selenium from wastewater containing selenium, wherein the wastewater is brought into contact with an adsorbent containing a rare earth compound by adjusting the pH of the wastewater to a value of not less than 1.0 and less than 4.5. By adjusting the pH of the wastewater, tetravalent and hexavalent selenium can be effectively adsorbed and removed from the wastewater.

一方、吸着剤に対して吸着性能の指標である分配係数（Ｋｄ）のｐＨ依存性が非特許文献１と非特許文献２と非特許文献３に示されている。
非特許文献１では、吸着剤として種々のゼオライトを用いた場合のＣｓ（セシウム）に対する分配係数（Ｋｄ）が公開されており、ゼオライトの種類により好適ｐＨが異なる事が公開されている。また、非特許文献２では、市販の無機吸着剤であるチタン酸塩を母材としたＳｒトリートのＳｒ（ストロンチウム）に対する分配係数（Ｋｄ）が公開されている。Ｓｒトリートは塩基性では高いＫｄを示すが、酸性〜中性領域ではＫｄが大幅に低下する。さらに、非特許文献３では、無機吸着剤であるアンチモン酸塩、チタンケイ酸塩、ＳｒトリートのＳｒに対するＫｄが公開されている。塩基性領域（ｐＨ１０〜）でアンチモン酸塩はＫｄが低下傾向にあるのに対し、チタンケイ酸およびＳｒトリートは中性〜塩基性でＫｄが大幅に増加することが示されている。 On the other hand, Non-Patent Literature 1, Non-Patent Literature 2, and Non-Patent Literature 3 show the pH dependence of the distribution coefficient (Kd), which is an index of the adsorption performance for an adsorbent.
Non-Patent Document 1 discloses a partition coefficient (Kd) for Cs (cesium) when various zeolites are used as an adsorbent, and discloses that a suitable pH varies depending on the type of zeolite. In addition, Non-Patent Document 2 discloses the distribution coefficient (Kd) of Sr treat using a commercially available inorganic adsorbent, titanate, as a base material with respect to Sr (strontium). The Sr treat shows a high Kd in basicity, but the Kd is significantly reduced in the acidic to neutral range. Furthermore, Non-Patent Document 3 discloses Kd for Sr of antimonate, titanium silicate, and Sr treat, which are inorganic adsorbents. In the basic region (pH 10), antimonate salt has a tendency to decrease Kd, while titanium silicic acid and Sr treat have been shown to have a large increase in Kd from neutral to basic.

特開２０１３−７８７１１号公報JP 2013-78711 A

三村 均，菅野 卓治：Na型およびH型ゼオライトに対するCs，Sr，Ce，EuおよびTbの分配，東北大学選錬研究所報告 第774号（１９７８）Hitoshi Mimura, Takuji Sugano: Partition of Cs, Sr, Ce, Eu and Tb on Na-type and H-type zeolites, Report of Tohoku University Institute for Solidification Research No. 774 (1978) Jukka Lehto et al.：Sr Treat-A highly effective ion exchanger for the removal of radioactive strontium from nuclear waste solutions：Radioactive waste management and environmental remediation：p. 245- 248(1997)Jukka Lehto et al .: Sr Treat-A highly effective ion exchanger for the removal of radioactive strontium from nuclear waste solutions: Radioactive waste management and environmental remediation: p. 245-248 (1997) Teresia Moller：Selective crystalline inorganic materials as ion exchangers in the treatment of nuclear waste solutions：Helsinki大学博士論文(2002)Teresia Moller: Selective crystalline inorganic materials as ion exchangers in the treatment of nuclear waste solutions: Doctoral dissertation from Helsinki University (2002)

上述したように、廃液処理に用いられる吸着剤は、廃液のｐＨの値によってその吸着性能が変化する。吸着性能が低下するｐＨ値の廃液を、その吸着剤で処理する場合には、大量の吸着剤が必要となり、処理後の廃棄物量が増大するという問題がある。   As described above, the adsorption performance of the adsorbent used for waste liquid treatment changes depending on the pH value of the waste liquid. When a waste liquid having a pH value at which the adsorption performance decreases is treated with the adsorbent, a large amount of the adsorbent is required, and there is a problem that the amount of waste after the treatment increases.

廃液の処理効率を保持するために、廃液のｐＨ調整を行う場合には、設備配管の腐食や、共存成分の析出と放射性物質の収着といった新たな課題が生じる。例えば、酸性廃液で高い吸着性能を示す吸着剤を使用して、塩基性の廃液を処理する場合には、この廃液に塩酸等の酸を注入してｐＨを下げる必要がある。この場合には、耐酸性のタンクや、注入機構の設置が必要となる。また、廃液への酸の注入は、局所的な添加となるので、廃液処理装置内で配管腐食が発生する虞がある。   When the pH of the waste liquid is adjusted to maintain the waste liquid treatment efficiency, new problems such as corrosion of equipment piping, precipitation of coexisting components, and sorption of radioactive substances occur. For example, when a basic waste liquid is treated using an adsorbent exhibiting high adsorption performance with an acidic waste liquid, it is necessary to lower the pH by injecting an acid such as hydrochloric acid into the waste liquid. In this case, it is necessary to provide an acid-resistant tank and an injection mechanism. Further, since the injection of the acid into the waste liquid is a local addition, there is a possibility that corrosion of the piping occurs in the waste liquid treatment apparatus.

一方、塩基性廃液で高い吸着性能を示す吸着剤を使用して、酸性の廃液を処理する場合には、水酸化ナトリウム等の塩基性物質またはその水溶液を廃液に添加する。これに伴い、特に注入場所付近では急激にｐＨが上昇し、炭酸塩類等の共存物質の析出が起きる。加えて、共存物質の析出に同伴し、放射性物質が収着する虞がある。   On the other hand, when an acidic waste liquid is treated using an adsorbent exhibiting high adsorption performance with a basic waste liquid, a basic substance such as sodium hydroxide or an aqueous solution thereof is added to the waste liquid. Along with this, the pH rises sharply, especially near the injection site, and precipitation of coexisting substances such as carbonates occurs. In addition, the radioactive substance may be sorbed accompanying the precipitation of the coexisting substance.

ところで、イオン交換作用を利用した吸着剤を廃液処理に用いる場合は、イオン交換反応は可逆反応であるため、液性の変化に伴い捕捉したイオンを廃液中に放出することに留意する。例えば、被処理廃液の種類や上段での処理の変化により、流入する廃液のｐＨが経時的に変化する場合には、吸着した放射性物質の放出を防ぐ手段が必要になり、例えば、廃液のｐＨを維持する制御が行われる。   By the way, when an adsorbent utilizing an ion exchange action is used for waste liquid treatment, it should be noted that the ion exchange reaction is a reversible reaction, so that the trapped ions are released into the waste liquid with a change in liquid properties. For example, when the pH of the inflowing waste liquid changes over time due to a change in the type of the waste liquid to be treated or the treatment in the upper stage, a means for preventing the release of the adsorbed radioactive substance is required. Is maintained.

本発明は上述した事柄に基づいてなされたものであって、その目的は、放射性廃液のｐＨ調整によらず吸着剤を有効に利用し、配管腐食や共存成分の析出と放射性物質の収着を抑制し、廃液ｐＨが変化した際の放射性物質の放出を防ぐ放射性廃液の処理方法及び処理装置を提供することにある。   The present invention has been made based on the above-mentioned matters, and its purpose is to effectively utilize an adsorbent regardless of pH adjustment of a radioactive waste liquid, to prevent corrosion of piping, precipitation of coexisting components, and sorption of radioactive substances. It is an object of the present invention to provide a method and an apparatus for treating a radioactive waste liquid, which suppresses the release of radioactive substances when the pH of the waste liquid changes.

上記課題を解決するために、例えば特許請求の範囲に記載の構成を採用する。本願は、上記課題を解決する手段を複数含んでいるが、その一例を挙げるならば、放射性物質を含む放射性廃液と、前記放射性物質を吸着する吸着剤であって、高い吸着性能を実現する前記放射性廃液のｐＨの範囲である好適ｐＨ範囲が異なる少なくとも２種類の吸着剤と、前記放射性廃液のｐＨを測定するｐＨ測定機構とを備えた放射性廃液の処理装置の処理方法において、前記ｐＨ測定機構で前記放射性廃液のｐＨを測定する工程と、測定した前記放射性廃液のｐＨに応じて、前記吸着剤を少なくとも１種類以上使用して前記放射性廃液を処理する工程とを備え、前記放射性廃液の処理装置は、前記放射性廃液のｐＨが変化した際に、使用している前記吸着剤を他の吸着剤に変更する吸着剤選定機構を更に備え、変化前の前記放射性廃液のｐＨにおける前記吸着剤の吸着性能を演算する工程と、変化後の前記放射性廃液のｐＨにおける前記吸着剤の吸着性能を演算する工程と、変化後の前記放射性廃液のｐＨにおける前記吸着剤の吸着性能に対する変化前の前記放射性廃液のｐＨにおける前記吸着剤の吸着性能の比率Ｒを演算する工程と、前記比率Ｒと予め定めた規定値とを比較する工程と、前記比率Ｒが前記規定値を上回る場合に前記吸着剤選定機構により使用している吸着剤を他の吸着剤に変更する工程とを備えたことを特徴とする。 In order to solve the above problem, for example, a configuration described in the claims is adopted. The present application includes a plurality of means for solving the above-described problems, but to give an example, a radioactive waste liquid containing a radioactive substance, and an adsorbent that adsorbs the radioactive substance, and achieves high adsorption performance. The method for treating a radioactive liquid waste, comprising: at least two types of adsorbents having different preferable pH ranges, which are ranges of pH of the radioactive liquid waste, and a pH measuring mechanism for measuring the pH of the radioactive liquid waste, wherein the pH measuring mechanism Measuring the pH of the radioactive waste liquid, and treating the radioactive waste liquid using at least one kind of the adsorbent according to the measured pH of the radioactive waste liquid, and treating the radioactive waste liquid. The apparatus further comprises an adsorbent selection mechanism for changing the used adsorbent to another adsorbent when the pH of the radioactive waste liquid changes, and further comprising the radioactive waste liquid before the change. calculating the adsorption performance of the adsorbent at a pH, calculating the adsorption performance of the adsorbent at a changed pH of the radioactive waste liquid, and adsorbing the adsorbent at a changed pH of the radioactive waste liquid Calculating a ratio R of the adsorption performance of the adsorbent at the pH of the radioactive liquid waste before the change, a step of comparing the ratio R with a predetermined value, and the ratio R exceeds the specified value. Changing the used adsorbent to another adsorbent by the adsorbent selection mechanism in some cases .

本発明によれば、吸着性能が高いｐＨ領域の廃液で吸着剤を利用するので、吸着剤使用量およびｐＨ調整コストの削減が可能になる。また、ｐＨ調整に伴う配管腐食や共存成分の析出と放射性物質の収着を抑制し、廃液ｐＨが変化した際の放射性物質の放出を防止できる。   ADVANTAGE OF THE INVENTION According to this invention, since an adsorbent is used with the waste liquid of the pH region with high adsorption performance, the amount of adsorbent used and the pH adjustment cost can be reduced. In addition, it is possible to suppress corrosion of piping, precipitation of coexisting components, and sorption of radioactive substances due to pH adjustment, and release of radioactive substances when the pH of the waste liquid changes.

本発明の放射性廃液の処理方法及び処理装置の第１の実施の形態を構成する放射性廃液処理装置を示す概念図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a conceptual diagram which shows the radioactive waste liquid processing apparatus which comprises 1st Embodiment of the radioactive waste liquid processing method and processing apparatus of this invention. 本発明の放射性廃液の処理方法及び処理装置の第１の実施の形態を構成する吸着剤選定機構の処理内容を示すフローチャート図である。It is a flowchart figure which shows the processing content of the adsorbent selection mechanism which comprises 1st Embodiment of the processing method and processing apparatus of the radioactive waste liquid of this invention. 本発明の放射性廃液の処理方法及び処理装置の第２の実施の形態を構成する吸着剤選定機構の処理内容を示すフローチャート図である。It is a flowchart figure which shows the processing content of the adsorbent selection mechanism which comprises 2nd Embodiment of the processing method and processing apparatus of the radioactive waste liquid of this invention. 本発明の放射性廃液の処理方法及び処理装置の第２の実施の形態における吸着剤の吸着性能のｐＨ依存性を示す特性図である。It is a characteristic view showing pH dependence of adsorption performance of an adsorbent in a radioactive waste liquid treatment method and a treatment device of a second embodiment of the present invention. 本発明の放射性廃液の処理方法及び処理装置の第３の実施の形態を構成する放射性廃液処理装置を示す概念図である。It is a conceptual diagram which shows the radioactive waste liquid processing apparatus which comprises 3rd Embodiment of the radioactive liquid processing method and processing apparatus of this invention. 本発明の放射性廃液の処理方法及び処理装置の第３の実施の形態を構成する吸着剤選定機構の処理内容を示すフローチャート図である。It is a flowchart figure which shows the processing content of the adsorbent selection mechanism which comprises 3rd Embodiment of the processing method and processing apparatus of the radioactive waste liquid of this invention. 本発明の放射性廃液の処理方法及び処理装置の第３の実施の形態における吸着剤の吸着性能のｐＨ依存性を示す特性図である。It is a characteristic view showing pH dependence of adsorption performance of an adsorbent in a 3rd embodiment of a processing method of a radioactive waste liquid, and a processing device of the present invention. 本発明の放射性廃液の処理方法及び処理装置の第４の実施の形態を構成する放射性廃液処理装置を示す概念図である。It is a conceptual diagram which shows the radioactive waste liquid processing apparatus which comprises the 4th Embodiment of the processing method and processing apparatus of the radioactive waste liquid of this invention. 本発明の放射性廃液の処理方法及び処理装置の第４の実施の形態を構成する吸着剤及び廃液供給量選定機構の処理内容を示すフローチャート図である。It is a flowchart figure which shows the processing content of the adsorbent and waste liquid supply amount selection mechanism which comprises the 4th Embodiment of the processing method and processing apparatus of the radioactive waste liquid of this invention. 本発明の放射性廃液の処理方法及び処理装置の第４の実施の形態における吸着剤の吸着性能のｐＨ依存性を示す特性図である。It is a characteristic view showing pH dependence of adsorption performance of an adsorbent in a 4th embodiment of a disposal method of a radioactive waste liquid, and a processing device of the present invention. 本発明の放射性廃液の処理方法及び処理装置の第５の実施の形態を構成する放射性廃液処理装置を示す概念図である。It is a conceptual diagram which shows the radioactive waste liquid processing apparatus which comprises 5th Embodiment of the processing method and processing apparatus of the radioactive waste liquid of this invention. 本発明の放射性廃液の処理方法及び処理装置の第６の実施の形態を構成する放射性廃液処理装置を示す概念図である。It is a conceptual diagram which shows the radioactive waste liquid processing apparatus which comprises 6th Embodiment of the processing method and processing apparatus of the radioactive waste liquid of this invention. 本発明の放射性廃液の処理方法及び処理装置の第６の実施の形態を構成する吸着剤及び廃液供給量選定機構の処理内容を示すフローチャート図である。It is a flowchart figure which shows the processing content of the adsorbent and waste liquid supply amount selection mechanism which comprises 6th Embodiment of the processing method and processing apparatus of the radioactive waste liquid of this invention. 本発明の放射性廃液の処理方法及び処理装置の第７の実施の形態を構成する放射性廃液処理装置を示す概念図である。It is a conceptual diagram which shows the radioactive waste liquid processing apparatus which comprises 7th Embodiment of the radioactive waste liquid processing method and processing apparatus of this invention.

以下、本発明の放射性廃液の処理方法及び処理装置の実施の形態を図面を用いて説明する。   Hereinafter, embodiments of the method and apparatus for treating a radioactive liquid waste according to the present invention will be described with reference to the drawings.

図１Ａは本発明の放射性廃液の処理方法及び処理装置の第１の実施の形態を構成する放射性廃液処理装置を示す概念図、図１Ｂは本発明の放射性廃液の処理方法及び処理装置の第１の実施の形態を構成する吸着剤選定機構の処理内容を示すフローチャート図である。   FIG. 1A is a conceptual diagram showing a radioactive waste liquid treatment apparatus constituting a first embodiment of a radioactive waste liquid treatment method and treatment apparatus of the present invention, and FIG. 1B is a radioactive waste liquid treatment method and a first treatment apparatus of the present invention. It is a flowchart figure which shows the processing content of the adsorbent selection mechanism which comprises Embodiment of this invention.

図１Ａに示すように、本実施の形態を構成する放射性廃液処理装置は、放射性廃液１を格納する槽１０と、放射性廃液１のｐＨを測定するｐＨ測定機構１１と、吸着剤選定機構１２と、廃液供給機構１３と、吸着剤Ａを充填した第１吸着塔１４Ａと、吸着剤Ｂを充填した第２吸着塔１４Ｂとを備えている。放射性廃液１の中の目的物質は第１吸着塔１４Ａまたは第２吸着塔１４Ｂにおいて、吸着剤Ａまたは吸着剤Ｂにより吸着除去される。   As shown in FIG. 1A, a radioactive liquid waste treatment apparatus according to the present embodiment includes a tank 10 for storing a radioactive liquid 1, a pH measuring mechanism 11 for measuring the pH of the radioactive liquid 1, and an adsorbent selecting mechanism 12. , A waste liquid supply mechanism 13, a first adsorption tower 14A filled with an adsorbent A, and a second adsorption tower 14B filled with an adsorbent B. The target substance in the radioactive waste liquid 1 is adsorbed and removed by the adsorbent A or the adsorbent B in the first adsorption tower 14A or the second adsorption tower 14B.

吸着剤選定機構１２は、ｐＨ測定機構１１が測定した放射性廃液１のｐＨを入力し、予めデータベースとして格納されている吸着剤Ａ，ＢのｐＨに対する吸着性能を基に放射性廃液１を供給する吸着塔を選定し、廃液供給機構１３へ選定信号を出力する。   The adsorbent selecting mechanism 12 inputs the pH of the radioactive waste liquid 1 measured by the pH measuring mechanism 11, and supplies the radioactive waste liquid 1 based on the adsorption performance for the adsorbents A and B stored in advance as a database. A tower is selected, and a selection signal is output to the waste liquid supply mechanism 13.

廃液供給機構１３は、槽１０から放射性廃液１を吸い込み、吸着剤選定機構１２からの選定信号に従って、第１吸着塔１４Ａまたは第２吸着塔１４Ｂへ供給するポンプ２０と、槽１０とポンプ２０とを接続する配管と、ポンプ２０と第１及び第２吸着塔１４Ａ，１４Ｂとを接続する配管とを備えている。   The waste liquid supply mechanism 13 sucks the radioactive waste liquid 1 from the tank 10 and supplies it to the first adsorption tower 14A or the second adsorption tower 14B according to the selection signal from the adsorbent selection mechanism 12, the tank 10 and the pump 20 And a pipe connecting the pump 20 to the first and second adsorption towers 14A and 14B.

次に、廃液処理装置における処理の流れを説明する。
放射性廃液１を格納している槽１０において、ｐＨ測定機構１１により放射性廃液１のｐＨを測定する。測定したｐＨ値は、吸着剤選定機構１２に送られ、吸着剤選定機構１２が放射性廃液１を供給する吸着塔を選定する。 Next, the flow of processing in the waste liquid processing apparatus will be described.
In the tank 10 storing the radioactive waste liquid 1, the pH of the radioactive waste liquid 1 is measured by the pH measurement mechanism 11. The measured pH value is sent to the adsorbent selection mechanism 12, and the adsorbent selection mechanism 12 selects an adsorption tower to supply the radioactive waste liquid 1.

吸着剤選定機構１２は、廃液処理装置が備えている吸着剤Ａ、ＢのｐＨに対する吸着性能をデータベースとして格納している。吸着性能としては、例えば、分配係数Ｋｄや吸着容量Ｑを指標として用いる。測定した放射性廃液１のｐＨにおいて、吸着剤選定機構１２で、廃液処理装置に備えている吸着剤の内、吸着剤Ａの吸着性能が最も高いと判定された場合には廃液供給機構１３を介して第１吸着塔１４Ａに廃液を供給する。一方、吸着剤選定機構１２で吸着剤Ｂが適していると判定された場合には、廃液供給機構１３を介して第２吸着塔１４Ｂに廃液を供給する。放射性廃液１は第１吸着塔１４Ａまたは第２吸着塔１４Ｂに通水された後、処理液２として、排出される。   The adsorbent selection mechanism 12 stores, as a database, the adsorption performance of the adsorbents A and B provided in the waste liquid treatment apparatus with respect to pH. As the adsorption performance, for example, a distribution coefficient Kd or an adsorption capacity Q is used as an index. At the measured pH of the radioactive waste liquid 1, the adsorbent selection mechanism 12 determines that the adsorbent A has the highest adsorption performance among the adsorbents provided in the waste liquid treatment apparatus, and passes through the waste liquid supply mechanism 13. To supply the waste liquid to the first adsorption tower 14A. On the other hand, when the adsorbent selection mechanism 12 determines that the adsorbent B is suitable, the waste liquid is supplied to the second adsorption tower 14B via the waste liquid supply mechanism 13. The radioactive liquid waste 1 is passed through the first adsorption tower 14A or the second adsorption tower 14B, and then discharged as the processing liquid 2.

この時の放射性廃液を供給する吸着塔の選定方法に関し、酸性領域（ｐＨ〜６）で高い分配係数を持つ吸着剤を吸着剤Ａ、塩基性領域（ｐＨ８〜）で高い分配係数を持つ吸着剤を吸着剤Ｂとした場合の吸着剤選定機構１２の処理内容を図１Ｂに示す。図１Ｂにおいて、Ｋｄ，Ａ（ａ）は、吸着剤ＡのｐＨ＝ａにおける吸着性能を示す分配係数を示し、Ｋｄ，Ｂ（ａ）は、吸着剤ＢのｐＨ＝ａにおける吸着性能を示す分配係数を示す。ｐＨ測定機構１１で測定された放射性廃液１のｐＨがｐＨ＝ａの時を例に説明する。   At this time, regarding the method of selecting the adsorption tower that supplies the radioactive waste liquid, the adsorbent having a high partition coefficient in the acidic region (pH to 6) is used as the adsorbent A, and the adsorbent having a high partition coefficient in the basic region (pH 8 to). FIG. 1B shows the processing contents of the adsorbent selection mechanism 12 in the case where is the adsorbent B. In FIG. 1B, Kd, A (a) indicates a distribution coefficient indicating the adsorption performance of the adsorbent A at pH = a, and Kd, B (a) indicates a distribution coefficient indicating the adsorption performance of the adsorbent B at pH = a. Indicates the coefficient. The case where the pH of the radioactive waste liquid 1 measured by the pH measuring mechanism 11 is pH = a will be described as an example.

吸着剤選定機構１２は、ｐＨ＝ａにおける吸着剤Ａと吸着剤Ｂの吸着性能を比較し、より高い分配係数を持つ吸着剤を選定する（ステップＳ１１）。具体的には、Ｋｄ，Ａ（ａ）＞Ｋｄ，Ｂ（ａ）か否かを判断する。ｐＨ＝ａにおける吸着剤Ａの吸着性能が吸着剤Ｂの吸着性能より高い場合にはステップＳ１２へ進み、それ以外の場合はステップＳ１３へ進む。   The adsorbent selecting mechanism 12 compares the adsorption performance of the adsorbent A and the adsorbent B at pH = a, and selects an adsorbent having a higher distribution coefficient (step S11). Specifically, it is determined whether or not Kd, A (a)> Kd, B (a). If the adsorption performance of the adsorbent A at pH = a is higher than the adsorption performance of the adsorbent B, the process proceeds to step S12; otherwise, the process proceeds to step S13.

ステップＳ１１において、吸着剤Ａの吸着性能が吸着剤Ｂの吸着性能より高い場合、吸着剤選定機構１２は、吸着剤Ａを選択する（ステップＳ１２）。具体的には、吸着剤選定機構１２は、吸着剤Ａが充填された第１吸着塔１４Ａを選択し、廃液供給機構１３のポンプ２０により放射性廃液１を通水する。 In step S11, when the adsorption performance of the adsorbent A is higher than the adsorption performance of the adsorbent B, the adsorbent selection mechanism 12 selects the adsorbent A (step S12). Specifically, the adsorbent selecting mechanism 12 selects the first adsorption tower 14A filled with the adsorbent A, and allows the radioactive waste liquid 1 to flow through the pump 20 of the waste liquid supply mechanism 13.

ステップＳ１１において、吸着剤Ａの吸着性能が吸着剤Ｂの吸着性能より高くない場合、吸着剤選定機構１２は、吸着剤Ｂを選択する（ステップＳ１３）。具体的には、吸着剤選定機構１２は、吸着剤Ｂが充填された第２吸着塔１４Ｂを選択し、廃液供給機構１３のポンプ２０により放射性廃液１を通水する。   If the adsorption performance of the adsorbent A is not higher than the adsorption performance of the adsorbent B in step S11, the adsorbent selection mechanism 12 selects the adsorbent B (step S13). Specifically, the adsorbent selection mechanism 12 selects the second adsorption tower 14B filled with the adsorbent B, and passes the radioactive waste liquid 1 by the pump 20 of the waste liquid supply mechanism 13.

吸着剤としては、アンチモン酸や結晶性シリコチタネート、チタン酸等の無機イオン交換体、およびゼオライトが挙げられる。Ｃｓに対する吸着剤Ａとしては、例えば、Ｎａ置換天然モルデナイト、Ｎａ置換合成モルデナイト、Ｎａ置換クリノプチロライト等が挙げられる。Ｃｓに対する吸着剤Ｂとしては、例えば、Ｎａ置換Ｙ型ゼオライト、Ｎａ置換Ｘ型ゼオライト、Ｎａ置換Ａ型ゼオライト等が挙げられる。   Examples of the adsorbent include inorganic ion exchangers such as antimonic acid, crystalline silicotitanate, and titanic acid, and zeolites. Examples of the adsorbent A for Cs include Na-substituted natural mordenite, Na-substituted synthetic mordenite, and Na-substituted clinoptilolite. Examples of the adsorbent B for Cs include Na-substituted Y-type zeolite, Na-substituted X-type zeolite, and Na-substituted A-type zeolite.

Ｓｒに対する吸着剤Ａとして、例えばアンチモン酸塩、クリノプチロライトが挙げられる。Ｓｒに対する吸着剤Ｂとして、例えばチタン酸塩、チタンケイ酸塩が挙げられる。   Examples of the adsorbent A for Sr include antimonates and clinoptilolite. Examples of the adsorbent B for Sr include titanate and titanium silicate.

上述した本発明の放射性廃液の処理方法及び処理装置の第１の実施の形態によれば、吸着性能が高いｐＨ領域の廃液で吸着剤を利用するので、吸着剤使用量およびｐＨ調整コストの削減が可能になる。また、ｐＨ調整に伴う配管腐食や共存成分の析出と放射性物質の収着を抑制し、廃液ｐＨが変化した際の放射性物質の放出を防止できる。   According to the above-described first embodiment of the method and apparatus for treating a radioactive liquid waste according to the present invention, since the adsorbent is used in the waste liquid in a pH region having a high adsorption performance, the amount of the adsorbent used and the pH adjustment cost can be reduced. Becomes possible. In addition, it is possible to suppress corrosion of piping, precipitation of coexisting components, and sorption of radioactive substances due to pH adjustment, and release of radioactive substances when the pH of the waste liquid changes.

以下、本発明の放射性廃液の処理方法及び処理装置の第２の実施の形態を図面を用いて説明する。図２Ａは本発明の放射性廃液の処理方法及び処理装置の第２の実施の形態を構成する吸着剤選定機構の処理内容を示すフローチャート図、図２Ｂは本発明の放射性廃液の処理方法及び処理装置の第２の実施の形態における吸着剤の吸着性能のｐＨ依存性を示す特性図である。図２Ａ及び２Ｂにおいて、図１Ａ及び１Ｂに示す符号と同符号のものは同一部分であるので、その詳細な説明は省略する。   Hereinafter, a second embodiment of a method and apparatus for treating a radioactive liquid waste according to the present invention will be described with reference to the drawings. FIG. 2A is a flowchart showing the processing contents of an adsorbent selection mechanism constituting a second embodiment of the radioactive waste liquid treatment method and treatment apparatus of the present invention, and FIG. 2B is the radioactive waste liquid treatment method and treatment apparatus of the present invention. It is a characteristic view which shows pH dependence of the adsorption performance of the adsorbent in 2nd Embodiment of FIG. 2A and 2B, the same reference numerals as those shown in FIGS. 1A and 1B denote the same parts, and a detailed description thereof will be omitted.

本発明の放射性廃液の処理方法及び処理装置の第２の実施の形態は、大略第１の実施の形態と同様の機器で構成されるが、吸着剤選定機構１２における吸着剤の選定方法が異なる。
本実施の形態においては、放射性廃液１のｐＨが変化した場合における吸着剤選定機構１２の処理を規定した点が第１の実施の形態と異なる。具体的には、放射性廃液１のｐＨがｐＨ＝ａからｐＨ＝ｂに変化した場合に、現在処理に供している吸着剤の吸着性能の変化を予想して、吸着剤の吸着性能の変化に伴う目的物質の流出を防ぐ。このため、吸着剤選定機構１２は、ｐＨ測定機構１１が測定した放射性廃液１のｐＨの履歴を記録する記録部と、後述する変化率Ｒを演算し、予め定めた規定値と比較する演算部と、演算部で比較した変化率Ｒと規定値との関係から吸着剤の選択制御を行う制御部とを備えている。 The second embodiment of the method and apparatus for treating a radioactive liquid waste according to the present invention is generally configured with the same equipment as the first embodiment, but differs in the method of selecting an adsorbent in the adsorbent selecting mechanism 12. .
This embodiment is different from the first embodiment in that the processing of the adsorbent selecting mechanism 12 when the pH of the radioactive waste liquid 1 changes is specified. Specifically, when the pH of the radioactive waste liquid 1 changes from pH = a to pH = b, the change in the adsorption performance of the adsorbent currently being processed is predicted, and the change in the adsorption performance of the adsorbent is calculated. Prevent the accompanying outflow of the target substance. Therefore, the adsorbent selection mechanism 12 includes a recording unit that records the history of the pH of the radioactive waste liquid 1 measured by the pH measurement mechanism 11 and a calculation unit that calculates a rate of change R described below and compares the change rate R with a predetermined value. And a control unit that controls the selection of the adsorbent based on the relationship between the change rate R and the specified value compared by the calculation unit.

以下に、吸着剤選定機構１２での吸着剤選定方法について、吸着剤Ａを使用して処理をしている最中に放射性廃液１のｐＨがｐＨ＝ａからｐＨ＝ｂに変化した場合を例として説明する。   The following describes an example of a method of selecting an adsorbent in the adsorbent selection mechanism 12 in the case where the pH of the radioactive waste liquid 1 changes from pH = a to pH = b during the treatment using the adsorbent A. It will be described as.

図２Ｂに示すように、吸着剤Ａの吸着性能（Ｋｄ，Ａ）は、ｐＨ＝ａで最大値となり、ｐＨ値がａより増大あるいは減少することにより低下する。一方、吸着剤Ｂの吸着性能（Ｋｄ，Ｂ）は、ｐＨ＜ｂにおいて、吸着剤Ａの吸着性能（Ｋｄ，Ａ）より低く、ｐＨ＝ｂで、吸着剤Ａの吸着性能（Ｋｄ，Ａ）と等しくなり、ｐＨ＞ｂにおいて、吸着剤Ａの吸着性能（Ｋｄ，Ａ）より高くなる。ｐＨ＝ａにおける吸着剤Ａと吸着剤Ｂの性能を比較すると、吸着剤Ａがより高い性能を示すことから、放射性廃液１がｐＨ＝ａのときは、吸着剤Ａを用いた処理を行う。   As shown in FIG. 2B, the adsorption performance (Kd, A) of the adsorbent A reaches its maximum value at pH = a, and decreases as the pH value increases or decreases from a. On the other hand, the adsorption performance (Kd, B) of the adsorbent B is lower than the adsorption performance (Kd, A) of the adsorbent A at pH <b, and the adsorption performance (Kd, A) of the adsorbent A at pH = b. When pH> b, the adsorbent A has higher adsorption performance (Kd, A). Comparing the performance of the adsorbent A and the performance of the adsorbent B at pH = a, since the adsorbent A shows higher performance, when the radioactive waste liquid 1 has pH = a, the treatment using the adsorbent A is performed.

ここで、放射性廃液１のｐＨがｐＨ＝ａからｐＨ＝ｂまで変化した場合、吸着剤ＡのＫｄは、図２Ｂに示すようにＫｄ，Ａ（ａ）からＫｄ，Ａ（ｂ）まで低下する。この時の変化率Ｒを、以下の式１により定義する。
Ｒ＝Ｋｄ，Ａ（ａ）／Ｋｄ，Ａ（ｂ）・・・・・（１） Here, when the pH of the radioactive waste liquid 1 changes from pH = a to pH = b, the Kd of the adsorbent A decreases from Kd, A (a) to Kd, A (b) as shown in FIG. 2B. . The rate of change R at this time is defined by the following equation 1.
R = Kd, A (a) / Kd, A (b) (1)

吸着剤選定機構１２は、図２Ａに示すように以下の処理を行う。
吸着剤選定機構１２は、上述した式１の演算を行い、変化率Ｒが予め定めた規定値Ｘを上回るか否かを判断する（ステップＳ２１）。具体的には、Ｒ＝Ｋｄ，Ａ（ａ）／Ｋｄ，Ａ（ｂ）＞Ｘか否かを判断する。ここで、規定値Ｘは吸着剤ＡのＫｄ，Ａが低下して、目的物質が放射性廃液１中に流出しないことを目的に設定される。変化率Ｒが規定値Ｘを上回る場合には、ステップＳ２２へ進み、それ以外の場合にはステップＳ２３へ進む。 The adsorbent selection mechanism 12 performs the following processing as shown in FIG. 2A.
The adsorbent selecting mechanism 12 performs the calculation of the above-described equation 1, and determines whether or not the rate of change R exceeds a predetermined value X (step S21). Specifically, it is determined whether or not R = Kd, A (a) / Kd, A (b)> X. Here, the specified value X is set for the purpose of reducing the Kd, A of the adsorbent A and preventing the target substance from flowing out into the radioactive waste liquid 1. If the rate of change R exceeds the specified value X, the process proceeds to step S22; otherwise, the process proceeds to step S23.

ステップＳ２１において、変化率Ｒが規定値Ｘを上回る場合、吸着剤選定機構１２は、吸着剤Ｂを選択する（ステップＳ２２）。具体的には、吸着剤選定機構１２は、目的物質の放射性廃液１への流出を防ぐため、吸着剤Ａから吸着剤Ｂに切り替える指令信号を廃液供給機構１３に出力する。このことにより、吸着剤Ｂが充填された第２吸着塔１４Ｂが選択され、廃液供給機構１３のポンプ２０により放射性廃液１が通水される。 If the rate of change R exceeds the specified value X in step S21, the adsorbent selecting mechanism 12 selects the adsorbent B (step S22). Specifically, the adsorbent selection mechanism 12 outputs a command signal for switching from the adsorbent A to the adsorbent B to the waste liquid supply mechanism 13 in order to prevent the target substance from flowing out into the radioactive waste liquid 1. Thereby, the second adsorption tower 14B filled with the adsorbent B is selected, and the radioactive waste liquid 1 is passed by the pump 20 of the waste liquid supply mechanism 13.

ステップＳ２１において、変化率Ｒが規定値Ｘを上回らない場合、吸着剤選定機構１２は、放射性廃液１のｐＨ＝ｂにおける吸着剤Ａの吸着性能（Ｋｄ，Ａ（ｂ））と、ｐＨ＝ｂにおける吸着剤Ｂの吸着性能（Ｋｄ，Ｂ（ｂ））を比較し、より高い分配係数を持つ吸着剤を選定する（ステップＳ２３）。具体的には、Ｋｄ，Ａ（ｂ）＜Ｋｄ，Ｂ（ｂ）か否かを判断する。ｐＨ＝ｂにおける吸着剤Ｂの吸着性能が吸着剤Ａの吸着性能より高い場合にはステップＳ２２へ進み、それ以外の場合はステップＳ２４へ進む。 If the rate of change R does not exceed the specified value X in step S21, the adsorbent selection mechanism 12 determines the adsorption performance (Kd, A (b)) of the adsorbent A at pH = b of the radioactive waste liquid 1 and the pH = b Then, the adsorption performance (Kd, B (b)) of the adsorbent B is compared, and an adsorbent having a higher distribution coefficient is selected (step S23). Specifically, it is determined whether or not Kd, A (b) <Kd, B (b). If the adsorption performance of the adsorbent B at pH = b is higher than the adsorption performance of the adsorbent A, the process proceeds to step S22; otherwise, the process proceeds to step S24 .

ステップＳ２３において、ｐＨ＝ｂにおける吸着剤Ｂの吸着性能が吸着剤Ａの吸着性能より高くない場合には、吸着剤選定機構１２は、吸着剤Ａを選択する（ステップＳ２４）。具体的には、吸着剤選定機構１２は、吸着剤Ａの選択指令信号を廃液供給機構１３に出力する。このことにより、吸着剤Ａが充填された第１吸着塔１４Ａが選択され、廃液供給機構１３のポンプ２０により放射性廃液１が通水され、吸着剤の切り替えは生じない。 In step S23, if the adsorption performance of the adsorbent B at pH = b is not higher than the adsorption performance of the adsorbent A, the adsorbent selection mechanism 12 selects the adsorbent A (step S24). Specifically, the adsorbent selection mechanism 12 outputs a selection command signal for the adsorbent A to the waste liquid supply mechanism 13. Thereby, the first adsorption tower 14A filled with the adsorbent A is selected, the radioactive waste liquid 1 is passed by the pump 20 of the waste liquid supply mechanism 13, and the switching of the adsorbent does not occur.

上述した本発明の放射性廃液の処理方法及び処理装置の第２の実施の形態によれば、上述した第１の実施の形態と同様の効果を得ることができる。   According to the above-described second embodiment of the method and apparatus for treating a radioactive waste liquid of the present invention, the same effects as those of the above-described first embodiment can be obtained.

また、上述した本発明の放射性廃液の処理方法及び処理装置の第２の実施の形態によれば、放射性廃液１のｐＨがｐＨ＝ａからｐＨ＝ｂに変化した場合に、現在処理に供している吸着剤の吸着性能の変化を予想するので、吸着剤の吸着性能の変化に伴う目的物質の流出を防ぐことができる。   In addition, according to the above-described second embodiment of the method and apparatus for treating a radioactive liquid waste of the present invention, when the pH of the radioactive liquid waste 1 changes from pH = a to pH = b, the radioactive liquid waste is currently subjected to the treatment. Since the change in the adsorption performance of the adsorbent is predicted, the outflow of the target substance due to the change in the adsorption performance of the adsorbent can be prevented.

以下、本発明の放射性廃液の処理方法及び処理装置の第３の実施の形態を図面を用いて説明する。図３Ａは本発明の放射性廃液の処理方法及び処理装置の第３の実施の形態を構成する放射性廃液処理装置を示す概念図、図３Ｂは本発明の放射性廃液の処理方法及び処理装置の第３の実施の形態を構成する吸着剤選定機構の処理内容を示すフローチャート図、図３Ｃは本発明の放射性廃液の処理方法及び処理装置の第３の実施の形態における吸着剤の吸着性能のｐＨ依存性を示す特性図である。図３Ａ乃至３Ｃにおいて、図１Ａ乃至２Ｂに示す符号と同符号のものは同一部分であるので、その詳細な説明は省略する。   Hereinafter, a third embodiment of the method and apparatus for treating a radioactive liquid waste according to the present invention will be described with reference to the drawings. FIG. 3A is a conceptual diagram showing a radioactive waste liquid treatment apparatus and a third embodiment of the radioactive waste liquid treatment apparatus according to the third embodiment of the present invention, and FIG. 3B is a third embodiment of the radioactive waste liquid treatment method and treatment apparatus of the present invention. FIG. 3C is a flowchart showing the processing contents of the adsorbent selecting mechanism constituting the third embodiment, and FIG. 3C is a diagram showing the pH dependence of the adsorption performance of the adsorbent in the third embodiment of the method and apparatus for treating a radioactive liquid waste according to the present invention. FIG. 3A to 3C, the same reference numerals as those shown in FIGS. 1A to 2B denote the same parts, and a detailed description thereof will be omitted.

本発明の放射性廃液の処理方法及び処理装置の第３の実施の形態は、大略第１の実施の形態と同様の機器で構成されるが、吸着剤Ａを充填した第１吸着塔１４Ａと、吸着剤Ｂを充填した第２吸着塔１４Ｂを直列に配置している点と、吸着剤選定機構１２において、第１吸着塔１４Ａを用いた処理と、第２吸着塔１４Ｂを用いた処理と、第１吸着塔１４Ａと第２吸着塔１４Ｂを用いた処理のいずれかを選択する点が異なる。   The third embodiment of the method and apparatus for treating a radioactive liquid waste according to the present invention is generally configured with the same equipment as the first embodiment, but includes a first adsorption tower 14A filled with an adsorbent A, The point in which the second adsorption towers 14B filled with the adsorbent B are arranged in series, and the processing using the first adsorption towers 14A and the processing using the second adsorption towers 14B in the adsorbent selection mechanism 12, The difference is that one of the treatments using the first adsorption tower 14A and the second adsorption tower 14B is selected.

図３Ａに示すように、本実施の形態を構成する放射性廃液処理装置の廃液供給機構１３は、吸着剤選定機構１２からの選定信号に従って、槽１０から放射性廃液１を吸い込み、第１吸着塔１４Ａへ供給する第１ポンプ２０Ａと、槽１０から放射性廃液１を吸い込み、第２吸着塔１４Ｂへ供給する第２ポンプ２０Ｂと、第２吸着塔１４Ｂを通水された後の処理液２を吸い込み、第１吸着塔１４Ａへ供給する移送ポンプ２０Ｔと、槽１０と第１及び第２ポンプ２０Ａ，２０Ｂとを接続する配管と、第２ポンプ２０Ｂと第２吸着塔１４Ｂ及び第１ポンプ２０Ａと第１吸着塔１４Ａを接続する配管と、移送ポンプ２０Ｔと第２吸着塔１４Ｂ及び第１吸着塔１４Ａを接続する配管とを備えている。   As shown in FIG. 3A, the waste liquid supply mechanism 13 of the radioactive waste liquid treatment apparatus constituting the present embodiment sucks the radioactive waste liquid 1 from the tank 10 according to the selection signal from the adsorbent selection mechanism 12, and sends the first adsorption tower 14A A first pump 20A that supplies the radioactive waste liquid 1 from the tank 10, and a second pump 20B that supplies the radioactive waste liquid 1 to the second adsorption tower 14B, and the processing liquid 2 that has been passed through the second adsorption tower 14B. A transfer pump 20T for supplying to the first adsorption tower 14A, a pipe connecting the tank 10 to the first and second pumps 20A and 20B, a second pump 20B, the second adsorption tower 14B, the first pump 20A and the first A pipe connecting the adsorption tower 14A and a pipe connecting the transfer pump 20T, the second adsorption tower 14B, and the first adsorption tower 14A are provided.

図３Ａにおいて、一点鎖線で示す配管は、吸着剤選定機構１２からの指令により第１吸着塔１４Ａのみを用いた処理を行う場合を示し、直線で示す配管は、吸着剤選定機構１２からの指令により第２吸着塔１４Ｂのみを用いた処理を行う場合を示す、破線で示す配管は、吸着剤選定機構１２からの指令により第２吸着塔１４Ｂと第１吸着塔１４Ａを用いる場合を示している。   In FIG. 3A, a pipe indicated by a dashed line indicates a case where processing using only the first adsorption tower 14 </ b> A is performed according to a command from the adsorbent selection mechanism 12, and a pipe indicated by a straight line indicates a command from the adsorbent selection mechanism 12. The line indicated by a broken line indicates a case where the process using only the second adsorption tower 14B is performed by using the second adsorption tower 14B and the first adsorption tower 14A according to a command from the adsorbent selection mechanism 12. .

本実施の形態においては、吸着剤Ａの吸着性能が予め定めた規定値ｙ以上にある放射性廃液１のｐＨの範囲と、吸着剤Ｂの吸着性能が予め定めた規定値ｙ以上にある放射性廃液１のｐＨの範囲とを算出し、重なり合うｐＨの範囲において、一方の吸着剤を通水した処理液２を他方の吸着剤に通水する処理を行うことを特徴とする。   In the present embodiment, the pH range of the radioactive waste liquid 1 in which the adsorption performance of the adsorbent A is equal to or higher than the predetermined specified value y, and the radioactive waste liquid in which the adsorption performance of the adsorbent B is equal to or higher than the predetermined specified value y A pH range of 1 is calculated, and a process of passing the treatment liquid 2 having passed one adsorbent through the other adsorbent is performed in the overlapping pH range.

本実施の形態における吸着剤選定機構１２の吸着剤ＡとＢの選定方法について説明する。図３Ｃに示すように、吸着剤Ａの吸着性能（Ｋｄ，Ａ）は、ｐＨ＝ａ１で最大値となり、ｐＨ値がａ１より増大あるいは減少することにより低下し、ｐＨ＝ａ２のときに予め設定された規定値ｙと分配係数Ｋｄが等しくなり、ｐＨ＞ａ２で、分配係数Ｋｄは規定値ｙ未満に低下する。一方、吸着剤Ｂの吸着性能（Ｋｄ，Ｂ）は、ｐＨ＝ａ２で最大値となり、ｐＨ値がａ２より増大あるいは減少することにより低下し、ｐＨ＝ａ１のときに予め設定された規定値ｙと分配係数Ｋｄが等しくなり、ｐＨ＜ａ１で、分配係数Ｋｄは規定値ｙ未満に低下する。ここで、ａ１＜ａ２である。なお、吸着剤選定機構１２には図３Ｃに示すような吸着剤ＡとＢの吸着性能のｐＨ依存性がデータベースとして保存されていて、これらを用いて吸着剤選定の処理を行う。なお、図３Ｂにおいては、放射性廃液１のｐＨをｐＨ＝ａとして示す。 A method of selecting the adsorbents A and B by the adsorbent selection mechanism 12 according to the present embodiment will be described. As shown in FIG. 3C, the adsorption performance (Kd, A) of the adsorbent A reaches a maximum value at pH = a1, decreases as the pH value increases or decreases from a1, and is preset when pH = a2. The specified value y and the distribution coefficient Kd become equal, and when pH> a2, the distribution coefficient Kd falls below the specified value y. On the other hand, the adsorption performance (Kd, B) of the adsorbent B reaches a maximum value at pH = a2, decreases as the pH value increases or decreases from a2, and a predetermined value y set at pH = a1. And the distribution coefficient Kd become equal, and at pH <a1, the distribution coefficient Kd falls below the specified value y. Here, a1 <a2. The adsorbent selection mechanism 12 stores the pH dependence of the adsorption performance of the adsorbents A and B as a database as shown in FIG. 3C, and performs an adsorbent selection process using these. In FIG. 3B, the pH of the radioactive liquid waste 1 is shown as pH = a.

吸着剤選定機構１２は、ｐＨ＝ａにおける吸着剤Ａと吸着剤Ｂの吸着性能が規定値ｙを超過するか否かを判断する（ステップＳ３１）。例えば、放射性廃液１のｐＨ＝ａが、ａ１＜ａ＜ａ２のとき、図３Ｃより吸着剤Ａと吸着剤Ｂの吸着性能（Ｋｄ，Ａ（ａ）、Ｋｄ，Ｂ（ａ））は、いずれも規定値ｙを超過する。換言すると、Ｋｄ，Ａ（ａ）＞ｙ、かつ、Ｋｄ，Ｂ（ａ）＞ｙか否かを判断する。ｐＨ＝ａにおける吸着剤Ａと吸着剤Ｂの吸着性能が規定値ｙを超過する場合には、ステップＳ３２へ進み、それ以外の場合にはステップＳ３３へ進む。   The adsorbent selecting mechanism 12 determines whether or not the adsorption performance of the adsorbent A and the adsorbent B at pH = a exceeds the specified value y (step S31). For example, when the pH = a of the radioactive waste liquid 1 satisfies a1 <a <a2, the adsorption performances (Kd, A (a), Kd, B (a)) of the adsorbent A and the adsorbent B are all shown in FIG. 3C. Also exceeds the specified value y. In other words, it is determined whether or not Kd, A (a)> y and Kd, B (a)> y. When the adsorption performance of the adsorbent A and the adsorbent B at pH = a exceeds the specified value y, the process proceeds to step S32, and otherwise, the process proceeds to step S33.

ステップＳ３１において、吸着剤Ａと吸着剤Ｂの吸着性能（Ｋｄ，Ａ（ａ）、Ｋｄ，Ｂ（ａ））がいずれも規定値ｙを超過する場合、吸着剤選定機構１２は、吸着剤ＡとＢを選択する（ステップＳ３２）。具体的には、第１吸着塔１４Ａと第２吸着塔１４Ｂとを用いる指令信号を廃液供給機構１３に出力して、放射性廃液１を第２吸着塔１４Ｂに通水した後、廃液供給機構１３の移送ポンプ２０Ｔにより第２吸着塔１４Ｂからの処理液２をさらに第１吸着塔１４Ａに通水する処理を行う。 In step S31, if the adsorption performances (Kd, A (a), Kd, B (a)) of the adsorbent A and the adsorbent B both exceed the specified value y, the adsorbent selection mechanism 12 sets the adsorbent A And B are selected (step S32). Specifically, a command signal for using the first adsorption tower 14A and the second adsorption tower 14B is output to the waste liquid supply mechanism 13, and the radioactive waste liquid 1 is passed through the second adsorption tower 14B. The treatment pump 2T performs a process of further passing the treatment liquid 2 from the second adsorption tower 14B to the first adsorption tower 14A.

ステップＳ３１において、ｐＨ＝ａにおける吸着剤Ａと吸着剤Ｂの吸着性能が規定値ｙを超過しない場合、吸着剤選定機構１２は、放射性廃液１のｐＨ＝ａにおける吸着剤Ａの吸着性能（Ｋｄ，Ａ（ａ））と、ｐＨ＝ａにおける吸着剤Ｂの吸着性能（Ｋｄ，Ｂ（ａ））を比較し、より高い分配係数を持つ吸着剤を選定する（ステップＳ３３）。具体的には、Ｋｄ，Ａ（ａ）＜Ｋｄ，Ｂ（ａ）か否かを判断する。ｐＨ＝ａにおける吸着剤Ｂの吸着性能が吸着剤Ａの吸着性能より高い場合にはステップＳ３４へ進み、それ以外の場合はステップＳ３５へ進む。   In step S31, when the adsorption performance of the adsorbent A and the adsorbent B at pH = a does not exceed the specified value y, the adsorbent selection mechanism 12 determines the adsorption performance of the adsorbent A at pH = a of the radioactive waste liquid 1 (Kd , A (a)) and the adsorption performance (Kd, B (a)) of the adsorbent B at pH = a, and select an adsorbent having a higher distribution coefficient (step S33). Specifically, it is determined whether or not Kd, A (a) <Kd, B (a). If the adsorption performance of the adsorbent B at pH = a is higher than the adsorption performance of the adsorbent A, proceed to step S34, otherwise proceed to step S35.

例えば、放射性廃液１のｐＨ＝ａがａ＞ａ２の時、図３Ｃより吸着剤Ｂの吸着性能のみが規定値ｙを超過する。この場合、吸着剤選定機構１２は、ステップＳ３４へ移行する。吸着剤選定機構１２は、吸着剤Ｂを選択する（ステップＳ３４）。具体的には、吸着剤選定機構１２は、吸着剤Ｂが充填された第２吸着塔１４Ｂのみを選択し、廃液供給機構１３の第２ポンプ２０Ｂにより放射性廃液１を通水する。   For example, when the pH = a of the radioactive waste liquid 1 is a> a2, only the adsorption performance of the adsorbent B exceeds the specified value y from FIG. 3C. In this case, the process proceeds to step S34. The adsorbent selection mechanism 12 selects the adsorbent B (Step S34). Specifically, the adsorbent selection mechanism 12 selects only the second adsorption tower 14B filled with the adsorbent B, and allows the radioactive waste liquid 1 to flow through the second pump 20B of the waste liquid supply mechanism 13.

ステップＳ３３において、ｐＨ＝ａにおける吸着剤Ｂの吸着性能が吸着剤Ａの吸着性能より高くない場合、吸着剤選定機構１２は、吸着剤Ａを選択する（ステップＳ３５）。例えば、放射性廃液１のｐＨ＝ａがａ＜ａ１のとき、図３Ｃより吸着剤Ａの吸着性能のみが規定値ｙを超過する。この場合、吸着剤選定機構１２は、ステップＳ３５へ移行する。具体的には、吸着剤選定機構１２は、吸着剤Ａが充填された第１吸着塔１４Ａのみを選択し、廃液供給機構１３の第１ポンプ２０Ａにより放射性廃液１を通水する。   In step S33, when the adsorption performance of the adsorbent B at pH = a is not higher than the adsorption performance of the adsorbent A, the adsorbent selection mechanism 12 selects the adsorbent A (step S35). For example, when pH = a of the radioactive waste liquid 1 satisfies a <a1, only the adsorption performance of the adsorbent A exceeds the specified value y from FIG. 3C. In this case, the sorbent selecting mechanism 12 proceeds to step S35. Specifically, the adsorbent selection mechanism 12 selects only the first adsorption tower 14A filled with the adsorbent A, and allows the radioactive waste liquid 1 to flow through the first pump 20A of the waste liquid supply mechanism 13.

上述した本発明の放射性廃液の処理方法及び処理装置の第３の実施の形態によれば、上述した第１の実施の形態と同様の効果を得ることができる。   According to the above-described third embodiment of the method and apparatus for treating a radioactive waste liquid of the present invention, the same effects as those of the first embodiment can be obtained.

また、上述した本発明の放射性廃液の処理方法及び処理装置の第３の実施の形態によれば、処理液２に含まれる目的物質の濃度をより低減できる。   Further, according to the above-described third embodiment of the method and apparatus for treating a radioactive waste liquid of the present invention, the concentration of the target substance contained in the treatment liquid 2 can be further reduced.

以下、本発明の放射性廃液の処理方法及び処理装置の第４の実施の形態を図面を用いて説明する。図４Ａは本発明の放射性廃液の処理方法及び処理装置の第４の実施の形態を構成する放射性廃液処理装置を示す概念図、図４Ｂは本発明の放射性廃液の処理方法及び処理装置の第４の実施の形態を構成する吸着剤及び廃液供給量選定機構の処理内容を示すフローチャート図、図４Ｃは本発明の放射性廃液の処理方法及び処理装置の第４の実施の形態における吸着剤の吸着性能のｐＨ依存性を示す特性図である。図４Ａ乃至４Ｃにおいて、図１Ａ乃至３Ｃに示す符号と同符号のものは同一部分であるので、その詳細な説明は省略する。   Hereinafter, a fourth embodiment of the method and apparatus for treating a radioactive waste liquid according to the present invention will be described with reference to the drawings. FIG. 4A is a conceptual diagram showing a radioactive waste liquid treatment apparatus and a fourth embodiment of the radioactive waste liquid treatment apparatus according to the fourth embodiment of the present invention, and FIG. FIG. 4C is a flowchart showing the processing contents of the adsorbent and waste liquid supply amount selection mechanism constituting the embodiment of the present invention. FIG. 4C is the adsorption performance of the adsorbent according to the fourth embodiment of the radioactive liquid processing method and the processing apparatus of the present invention. FIG. 3 is a characteristic diagram showing the pH dependence of the above. 4A to 4C, the same reference numerals as those shown in FIGS. 1A to 3C denote the same parts, and a detailed description thereof will be omitted.

本発明の放射性廃液の処理方法及び処理装置の第４の実施の形態は、大略第１の実施の形態と同様の機器で構成されるが、異なるｐＨの放射性廃液１Ａ，１Ｂが充填された第１槽１０Ａと第２槽１０Ｂを備えた点と、吸着剤及び廃液供給量選定機構１２Ａからの指令により、放射性廃液１Ａと放射性廃液１Ｂを任意の混合比率で混合する廃液供給機構１３Ａを備えた点が異なる。   The fourth embodiment of the method and the apparatus for treating a radioactive liquid waste according to the present invention is generally constituted by the same equipment as that of the first embodiment, but is filled with radioactive liquid wastes 1A and 1B having different pHs. A waste liquid supply mechanism 13A for mixing the radioactive waste liquid 1A and the radioactive waste liquid 1B at an arbitrary mixing ratio according to a point provided with the first tank 10A and the second tank 10B and an instruction from the adsorbent and waste liquid supply amount selection mechanism 12A. The points are different.

図４Ａに示すように、本実施の形態を構成する放射性廃液処理装置は、放射性廃液１Ａを格納する第１槽１０Ａと、放射性廃液１ＡのｐＨを測定するｐＨ測定機構１１Ａと、放射性廃液１Ｂを格納する第２槽１０Ｂと、放射性廃液１ＢのｐＨを測定するｐＨ測定機構１１Ｂと、吸着剤及び廃液供給量選定機構１２Ａと、廃液供給機構１３Ａと、吸着剤Ａを充填した第１吸着塔１４Ａと、吸着剤Ｂを充填した第２吸着塔１４Ｂとを備えている。   As shown in FIG. 4A, the radioactive liquid waste treatment apparatus according to the present embodiment includes a first tank 10A for storing the radioactive liquid 1A, a pH measuring mechanism 11A for measuring the pH of the radioactive liquid 1A, and a radioactive liquid 1B. The second tank 10B to be stored, the pH measurement mechanism 11B for measuring the pH of the radioactive waste liquid 1B, the adsorbent and waste liquid supply amount selection mechanism 12A, the waste liquid supply mechanism 13A, and the first adsorption tower 14A filled with the adsorbent A And a second adsorption tower 14B filled with the adsorbent B.

吸着剤及び廃液供給量選定機構１２Ａは、ｐＨ測定機構１１Ａと１１Ｂが測定した放射性廃液１Ａ及び１ＢのｐＨを入力し、予めデータベースとして格納されている吸着剤Ａ，ＢのｐＨに対する吸着性能を基に、放射性廃液１Ａと１Ｂの混合比率を演算するとともに、これら放射性廃液１Ａ，１Ｂや混合液を供給する吸着塔を選定し、廃液供給機構１３Ａへ吸着剤及び廃液供給量の選定信号を出力する。   The adsorbent and waste liquid supply amount selection mechanism 12A inputs the pH of the radioactive waste liquids 1A and 1B measured by the pH measurement mechanisms 11A and 11B, and based on the adsorption performance for the pH of the adsorbents A and B stored in advance as a database. Next, while calculating the mixing ratio of the radioactive waste liquids 1A and 1B, an adsorption tower for supplying the radioactive waste liquids 1A and 1B and the mixed liquid is selected, and a selection signal of the adsorbent and the waste liquid supply amount is output to the waste liquid supply mechanism 13A. .

廃液供給機構１３Ａは、第１槽１０Ａから放射性廃液１Ａを吸い込み、吸着剤及び廃液供給量選定機構１２Ａからの吸着剤及び廃液供給量の選定信号に従って、混合比率に応じた供給流量を調整可能な第１ポンプ２０Ａ’と、第２槽１０Ｂから放射性廃液１Ｂを吸い込み、吸着剤及び廃液供給量選定機構１２Ａからの吸着剤及び廃液供給量の選定信号に従って、混合比率に応じた供給流量を調整可能な第２ポンプ２０Ｂ’と、第１ポンプ２０Ａ’と第２ポンプ２０Ｂ’の吐出した混合した放射性廃液を第１吸着塔１４Ａまたは第２吸着塔１４Ｂへ供給するポンプ２０と、第１槽１０Ａと第１ポンプ２０Ａ’、及び第２槽１０Ｂと第２ポンプ２０Ｂ’とを接続する配管と、第１ポンプ２０Ａ’と第２ポンプ２０Ｂ’とポンプ２０とを接続する配管と、ポンプ２０と第１吸着塔１４Ａ及び第２吸着塔１４Ｂとを接続する配管とを備えている。   The waste liquid supply mechanism 13A sucks the radioactive waste liquid 1A from the first tank 10A, and can adjust the supply flow rate according to the mixing ratio in accordance with the adsorbent and waste liquid supply amount selection signal from the adsorbent and waste liquid supply amount selection mechanism 12A. The radioactive waste liquid 1B is sucked from the first pump 20A 'and the second tank 10B, and the supply flow rate according to the mixing ratio can be adjusted according to the adsorbent and waste liquid supply amount selection signal from the adsorbent and waste liquid supply amount selection mechanism 12A. A second pump 20B ', a pump 20 for supplying the mixed radioactive waste liquid discharged from the first pump 20A' and the second pump 20B 'to the first adsorption tower 14A or the second adsorption tower 14B, and a first tank 10A. A pipe connecting the first pump 20A ', the second tank 10B and the second pump 20B', and a pipe connecting the first pump 20A ', the second pump 20B' and the pump 20 are provided. When, and a pipe and which connects the pump 20 and the first adsorption tower 14A and the second adsorption tower 14B.

なお、混合比率に応じた供給流量を調整可能とする構成としては、例えば、２系統からの廃液を受け入れることのできる分岐を持つ管と、混合槽と、インラインミキサー等を備えても良いし、各ポンプの回転数を調整するようにしても良い。   In addition, as a configuration capable of adjusting the supply flow rate according to the mixing ratio, for example, a pipe having a branch capable of receiving waste liquid from two systems, a mixing tank, an in-line mixer, or the like may be provided. The rotation speed of each pump may be adjusted.

本実施の形態においては、第１槽１０Ａの放射性廃液１ＡのｐＨと、第２槽１０Ｂの放射性廃液１ＢのｐＨとのいずれにおいても、一方の吸着剤の吸着性能が高い場合に、異なるｐＨの放射性廃液１Ａ，１Ｂを混合してｐＨ調整して、一方の吸着剤の吸着性能が高いｐＨ領域で処理を行うことを特徴とする。   In the present embodiment, in both the pH of the radioactive waste liquid 1A of the first tank 10A and the pH of the radioactive waste liquid 1B of the second tank 10B, when the adsorption performance of one of the adsorbents is high, different pHs are set. The pH is adjusted by mixing the radioactive waste liquids 1A and 1B, and the treatment is performed in a pH range where the adsorption performance of one adsorbent is high.

本実施の形態における吸着剤及び廃液供給量選定機構１２Ａの実施する放射性廃液１Ａ，１Ｂの混合要否の判断方法について説明する。まず、吸着剤及び廃液供給量選定機構１２Ａには図４Ｃに示すような吸着剤ＡとＢの吸着性能のｐＨ依存性がデータベースとして保存されている。本実施の形態においては、第１槽１０Ａの放射性廃液１ＡのｐＨがｐＨ＝ａ３であり、第２槽１０Ｂの放射性廃液１ＢのｐＨがｐＨ＝ｂ３であり、ａ３＜ｂ３の場合を例に説明する。この場合、ｐＨ＝ａ３からｐＨ＝ｂ３までの領域において、吸着剤Ａの分配係数Ｋｄ，Ａが吸着剤Ｂの分配係数Ｋｄ，Ｂよりも高い。 A method of determining the necessity of mixing the radioactive waste liquids 1A and 1B performed by the adsorbent and waste liquid supply amount selection mechanism 12A according to the present embodiment will be described. First, the pH dependence of the adsorption performance of the adsorbents A and B as shown in FIG. 4C is stored as a database in the adsorbent and waste liquid supply amount selection mechanism 12A. In the present embodiment, a description will be given of an example in which the pH of the radioactive waste liquid 1A in the first tank 10A is pH = a3, the pH of the radioactive waste liquid 1B in the second tank 10B is pH = b3, and a3 <b3. I do. In this case, the partition coefficient Kd, A of the adsorbent A is higher than the partition coefficient Kd, B of the adsorbent B in the range from pH = a3 to pH = b3.

図４Ｂにおいて、吸着剤及び廃液供給量選定機構１２Ａは、ｐＨ＝a３、ｐＨ＝ｂ３いずれにおいても吸着剤Ａのほうがより高い吸着性能を示す領域であるか否かを判断する（ステップＳ４１）。具体的には、Ｋｄ，Ａ（ａ３）＞Ｋｄ，Ｂ（ａ３）、かつ、Ｋｄ，Ａ（ｂ３）＞Ｋｄ，Ｂ（ｂ３）か否かを判断する。ｐＨ＝a３、ｐＨ＝ｂ３いずれにおいても吸着剤Ａのほうがより高い吸着性能を示す領域である場合には、ステップＳ４２へ進み、それ以外の場合にはステップＳ４３へ進む。   In FIG. 4B, the adsorbent and waste liquid supply amount selection mechanism 12A determines whether the adsorbent A is in a region exhibiting higher adsorption performance at both pH = a3 and pH = b3 (step S41). Specifically, it is determined whether or not Kd, A (a3)> Kd, B (a3) and Kd, A (b3)> Kd, B (b3). When the adsorbent A shows the higher adsorption performance in both the pH = a3 and the pH = b3, the process proceeds to step S42, and otherwise, the process proceeds to step S43.

吸着剤及び廃液供給量選定機構１２Ａは、異なるｐＨの放射性廃液１Ａと１Ｂを混合することで、ｐＨを調整し、より吸着剤Ａの吸着性能が高い領域で処理を行う（ステップＳ４２）。具体的には、第１ポンプ２０Ａ’と第２ポンプ２０Ｂ’の混合比率を調整することで、吸着剤Ａの吸着性能が高いｐＨ領域の混合放射性廃液を生成し、この混合放射性廃液をポンプ２０により第１吸着塔１４Ａに供給する。これにより、放射性廃液１Ａと放射性廃液１Ｂを吸着剤の吸着性能がより高いｐＨ領域で処理することができ、吸着剤を有効利用できる。また、本実施の形態においては、放射性廃液１Ａと放射性廃液１Ｂの混合によりｐＨを調整することから、急激なｐＨの変化が生じない。このことにより、ｐＨ調整に伴う設備の腐食や析出が生じにくい。   The adsorbent and waste liquid supply amount selection mechanism 12A adjusts the pH by mixing the radioactive waste liquids 1A and 1B having different pHs, and performs processing in a region where the adsorption performance of the adsorbent A is higher (step S42). Specifically, by adjusting the mixing ratio of the first pump 20A ′ and the second pump 20B ′, a mixed radioactive waste liquid in a pH range where the adsorption performance of the adsorbent A is high is generated. To supply it to the first adsorption tower 14A. Thereby, the radioactive waste liquid 1A and the radioactive waste liquid 1B can be treated in the pH region where the adsorption performance of the adsorbent is higher, and the adsorbent can be used effectively. Further, in the present embodiment, since the pH is adjusted by mixing the radioactive waste liquid 1A and the radioactive waste liquid 1B, a rapid change in pH does not occur. As a result, corrosion and precipitation of equipment due to pH adjustment are unlikely to occur.

ステップＳ４１において、ｐＨ＝a３、ｐＨ＝ｂ３いずれにおいても吸着剤Ａのほうがより高い吸着性能を示す領域ではない場合、放射性廃液１Ａと放射性廃液１Ｂとを別個に処理する（ステップＳ４３）。例えば、第２槽１０Ｂの放射性廃液１ＢのｐＨがｐＨ＝ｂ３’であり、ｂ３＜ｂ３’の場合であって、ｐＨ＝ｂ３’においては、吸着剤Ｂの分配係数Ｋｄ，Ｂが吸着剤Ａの分配係数Ｋｄ，Ａよりも高い場合、吸着剤及び廃液供給量選定機構１２Ａは、放射性廃液１Ａと放射性廃液１Ｂの適した吸着剤がそれぞれ異なるので、それぞれ別個に吸着剤を通水する処理を行う。放射性廃液１Ａは第１吸着塔１４Ａへ供給され、放射性廃液１Ｂは第２吸着塔１４Ｂへ供給され、放射性廃液の混合は行われない。 In step S41, when the adsorbent A is not in a region exhibiting higher adsorption performance at both pH = a3 and pH = b3, the radioactive waste liquid 1A and the radioactive waste liquid 1B are separately processed (step S43). For example, the pH of the radioactive waste liquid 1B in the second tank 10B is pH = b3 ′, and b3 <b3 ′. At pH = b3 ′, the distribution coefficient Kd, B of the adsorbent B is If the distribution coefficient Kd, A is higher than the distribution coefficient Kd, A, the suitable adsorbents for the radioactive waste liquid 1A and the radioactive waste liquid 1B are different from each other. Do. The radioactive waste liquid 1A is supplied to the first adsorption tower 14A, the radioactive waste liquid 1B is supplied to the second adsorption tower 14B, and the mixing of the radioactive waste liquid is not performed.

なお、ステップＳ４１において、第１槽１０Ａの放射性廃液１ＡのｐＨがｐＨ＝ａ３’であり、第２槽１０Ｂの放射性廃液１ＢのｐＨがｐＨ＝ｂ３’であり、ａ３’＜ｂ３’であって、ｐＨ＝ａ３’からｐＨ＝ｂ３’までの領域において、吸着剤Ｂの分配係数Ｋｄ，Ｂが吸着剤Ａの分配係数Ｋｄ，Ａよりも高い場合には、ステップＳ４２へ進み、異なるｐＨの放射性廃液１Ａと１Ｂを混合することで、ｐＨを調整し、より吸着剤Ｂの吸着性能が高い領域の混合放射性廃液を生成し、この混合放射性廃液をポンプ２０により第２吸着塔１４Ｂに供給して処理を行う。 In step S41, the pH of the radioactive waste liquid 1A in the first tank 10A is pH = a3 ′, the pH of the radioactive waste liquid 1B in the second tank 10B is pH = b3 ′, and a3 ′ <b3 ′. If the distribution coefficient Kd, B of the adsorbent B is higher than the distribution coefficient Kd, A of the adsorbent A in the range from pH = a3 ′ to pH = b3 ′, the process proceeds to step S42, where the radioactivity of different pH By mixing the waste liquids 1A and 1B, the pH is adjusted to generate a mixed radioactive waste liquid in a region where the adsorption performance of the adsorbent B is higher, and this mixed radioactive waste liquid is supplied to the second adsorption tower 14B by the pump 20. Perform processing.

上述した本発明の放射性廃液の処理方法及び処理装置の第４の実施の形態によれば、上述した第１の実施の形態と同様の効果を得ることができる。   According to the above-described fourth embodiment of the method and apparatus for treating a radioactive liquid waste according to the present invention, the same effects as those of the first embodiment can be obtained.

また、上述した本発明の放射性廃液の処理方法及び処理装置の第４の実施の形態によれば、吸着剤Ａおよび吸着剤Ｂがより高い吸着性能をもつｐＨ領域で、放射性廃液を処理することができるので、吸着剤使用量をより低減することができる。   Further, according to the above-described fourth embodiment of the method and apparatus for treating a radioactive liquid waste according to the present invention, the radioactive liquid waste is treated in the pH region where the adsorbent A and the adsorbent B have higher adsorption performance. Therefore, the amount of the adsorbent used can be further reduced.

以下、本発明の放射性廃液の処理方法及び処理装置の第５の実施の形態を図面を用いて説明する。図５は本発明の放射性廃液の処理方法及び処理装置の第５の実施の形態を構成する放射性廃液処理装置を示す概念図である。図５において、図１Ａ乃至４Ｃに示す符号と同符号のものは同一部分であるので、その詳細な説明は省略する。   Hereinafter, a fifth embodiment of the method and apparatus for treating a radioactive waste liquid according to the present invention will be described with reference to the drawings. FIG. 5 is a conceptual diagram showing a radioactive waste liquid treatment apparatus constituting a fifth embodiment of the radioactive waste liquid treatment method and treatment apparatus of the present invention. 5, the same reference numerals as those shown in FIGS. 1A to 4C denote the same parts, and a detailed description thereof will be omitted.

本発明の放射性廃液の処理方法及び処理装置の第５の実施の形態は、大略第１の実施の形態と同様の機器で構成されるが、第１吸着塔１４Ａとポンプ２０の間に、第１ブースターポンプ２０Ａ”と第１ｐＨ緩衝塔１５Ａを配置し、第２吸着塔１４Ｂとポンプ２０の間に、第２ブースターポンプ２０Ｂ”と第２ｐＨ緩衝塔１５Ｂを配置し、第１及び第２ブースターポンプを制御するｐＨ緩衝判定機構１６を備えた点が異なる。   The fifth embodiment of the radioactive liquid treatment method and the treatment apparatus according to the present invention is generally configured with the same equipment as the first embodiment. The first booster pump 20A "and the first pH buffer tower 15A are arranged, and the second booster pump 20B" and the second pH buffer tower 15B are arranged between the second adsorption tower 14B and the pump 20, and the first and second booster pumps are arranged. In that it has a pH buffer determination mechanism 16 for controlling

第１ブースターポンプ２０Ａ”は、第１吸着塔１４Ａと一の配管で接続され、第１ｐＨ緩衝塔１５Ａと他の配管で接続されている。第１ｐＨ緩衝塔１５Ａを通過した放射性廃液１は、配管を介して第１吸着塔１４Ａに流入する。同様に、第２ブースターポンプ２０Ｂ”は、第２吸着塔１４Ｂと一の配管で接続され、第２ｐＨ緩衝塔１５Ｂと他の配管で接続されている。第２ｐＨ緩衝塔１５Ｂを通過した放射性廃液１は、配管を介して第２吸着塔１４Ｂに流入する。   The first booster pump 20A ″ is connected to the first adsorption tower 14A by one pipe, and is connected to the first pH buffer tower 15A by another pipe. The radioactive waste liquid 1 that has passed through the first pH buffer tower 15A is Similarly, the second booster pump 20B ″ is connected to the second adsorption tower 14B via one pipe, and is connected to the second pH buffer tower 15B via another pipe. . The radioactive waste liquid 1 that has passed through the second pH buffer tower 15B flows into the second adsorption tower 14B via a pipe.

ｐＨ緩衝判定機構１６は、放射性廃液１の第１及び第２ｐＨ緩衝塔１５Ａ，Ｂへの通水の有無を判定するものである。具体的には、放射性廃液１のｐＨにおいて吸着剤Ａと吸着剤Ｂの吸着性能が予め設定した規定値未満の場合に、放射性廃液１を第１及び第２ｐＨ緩衝塔１５Ａ，Ｂへ通水する。このことにより、放射性廃液１のｐＨは、吸着剤Ａあるいは吸着剤Ｂの吸着性能が規定値を満たす範囲のｐＨに調整される。   The pH buffer determination mechanism 16 determines whether or not the radioactive waste liquid 1 flows through the first and second pH buffer towers 15A and 15B. Specifically, when the adsorption performance of the adsorbent A and the adsorbent B is lower than a predetermined value at the pH of the radioactive waste liquid 1, the radioactive waste liquid 1 is passed through the first and second pH buffer towers 15A and 15B. . As a result, the pH of the radioactive waste liquid 1 is adjusted to a pH within a range in which the adsorption performance of the adsorbent A or the adsorbent B satisfies the specified value.

第１及び第２ｐＨ緩衝塔１５Ａ，Ｂは、急激なｐＨ変化の発生とｐＨ調整に伴う腐食や析出を防ぐ観点から、その内部に緩衝溶液や、固体の酸あるいは塩基を放出する材料（ｐＨ緩衝材）を充填して構成され、通水した放射性廃液１のｐＨを調整するものである。   The first and second pH buffer towers 15A and 15B are provided with a buffer solution or a material that releases a solid acid or base (pH buffer) from the viewpoint of preventing abrupt pH change and corrosion and precipitation accompanying pH adjustment. ) To adjust the pH of the radioactive waste liquid 1 that has passed through.

ｐＨ緩衝判定機構１６は、放射性廃液１のｐＨにおいて吸着剤Ａと吸着剤Ｂの吸着性能が規定値以上の場合には、放射性廃液１を第１及び第２ｐＨ緩衝塔１５Ａ，Ｂへは通水せず、吸着剤を充填した第１及び第２吸着塔１４Ａ，Ｂに直接通水する。このことにより、ｐＨ緩衝材の使用を最小限に抑制できる。   When the adsorption performance of the adsorbent A and the adsorbent B is equal to or higher than the specified value at the pH of the radioactive waste liquid 1, the pH buffer determination mechanism 16 passes the radioactive waste liquid 1 to the first and second pH buffer towers 15A and 15B. Instead, water is directly passed through the first and second adsorption towers 14A and 14B filled with the adsorbent. This can minimize the use of a pH buffer.

上述した本発明の放射性廃液の処理方法及び処理装置の第５の実施の形態によれば、上述した第１の実施の形態と同様の効果を得ることができる。   According to the above-described fifth embodiment of the method and apparatus for treating a radioactive liquid waste according to the present invention, the same effects as those of the first embodiment can be obtained.

また、上述した本発明の放射性廃液の処理方法及び処理装置の第５の実施の形態によれば、吸着剤の吸着性能がより高いｐＨ領域で処理が行え、吸着剤が有効利用できる。   Moreover, according to the above-described fifth embodiment of the method and apparatus for treating a radioactive waste liquid of the present invention, the treatment can be performed in a pH region where the adsorbent has a higher adsorption performance, and the adsorbent can be used effectively.

以下、本発明の放射性廃液の処理方法及び処理装置の第６の実施の形態を図面を用いて説明する。図６Ａは本発明の放射性廃液の処理方法及び処理装置の第６の実施の形態を構成する放射性廃液処理装置を示す概念図、図６Ｂは本発明の放射性廃液の処理方法及び処理装置の第６の実施の形態を構成する吸着剤及び廃液供給量選定機構の処理内容を示すフローチャート図である。図６Ａ及び６Ｂにおいて、図１Ａ乃至５に示す符号と同符号のものは同一部分であるので、その詳細な説明は省略する。   Hereinafter, a sixth embodiment of the method and apparatus for treating a radioactive liquid waste according to the present invention will be described with reference to the drawings. FIG. 6A is a conceptual diagram showing a radioactive waste liquid treatment apparatus and a radioactive waste liquid treatment apparatus according to a sixth embodiment of the present invention, and FIG. 6B is a sixth embodiment of the radioactive waste liquid treatment method and treatment apparatus of the present invention. It is a flowchart figure which shows the content of a process of the adsorbent and waste liquid supply amount selection mechanism which comprises Embodiment of this invention. 6A and 6B, the same reference numerals as those shown in FIGS. 1A to 5 denote the same parts, and a detailed description thereof will be omitted.

本発明の放射性廃液の処理方法及び処理装置の第６の実施の形態は、大略第１の実施の形態と同様の機器で構成されるが、放射性廃液１を格納する槽１０に、放射性廃液１の塩分濃度（Salinity concentration）を測定する塩分濃度測定機構１７を設けた点と、吸着剤Ｃを充填した第３吸着塔１４Ｃと吸着剤Ｄを充填した第４吸着塔１４Ｄと吸着剤Ｅを充填した第５吸着塔１４Ｅと吸着剤Ｆを充填した第６吸着塔１４Ｆとを設けた点と、ｐＨ測定機構１１と塩分濃度測定機構１７からの計測値を基に吸着剤選定機構１２が放射性廃液１を供給する吸着塔を選定し、廃液供給機構１３へ選定信号を出力する点が異なる。   The sixth embodiment of the method and apparatus for treating radioactive liquid waste according to the present invention is generally constituted by the same equipment as that of the first embodiment. A salinity concentration measuring mechanism 17 for measuring the salinity concentration, a third adsorption tower 14C filled with an adsorbent C, a fourth adsorption tower 14D filled with an adsorbent D, and an adsorbent E The adsorbent selection mechanism 12 determines the radioactive waste liquid based on the provision of the fifth adsorption tower 14E and the sixth adsorption tower 14F filled with the adsorbent F, and the measured values from the pH measurement mechanism 11 and the salt concentration measurement mechanism 17. 1 is different in that an adsorption tower for supplying 1 is selected and a selection signal is output to the waste liquid supply mechanism 13.

図６Ａに示すように、本実施の形態を構成する放射性廃液処理装置の廃液供給機構１３は、吸着剤選定機構１２からの選定信号に従って、槽１０から放射性廃液１を吸い込み第３吸着塔１４Ｃへ供給する第３ポンプ２０Ｃと、槽１０から放射性廃液１を吸い込み第４吸着塔１４Ｄへ供給する第４ポンプ２０Ｄと、槽１０から放射性廃液１を吸い込み第５吸着塔１４Ｅへ供給する第５ポンプ２０Ｅと、槽１０から放射性廃液１を吸い込み第６吸着塔１４Ｆへ供給する第６ポンプ２０Ｆと、槽１０と第３乃至第６ポンプ２０Ｃ〜Ｆとを接続する配管と、第３乃至第６ポンプ２０Ｃ〜Ｆと第３乃至第６吸着塔１４Ｃ〜Ｆとをそれぞれ接続する配管とを備えている。   As shown in FIG. 6A, the waste liquid supply mechanism 13 of the radioactive waste liquid treatment apparatus constituting the present embodiment draws in the radioactive waste liquid 1 from the tank 10 to the third adsorption tower 14C according to the selection signal from the adsorbent selection mechanism 12. A third pump 20C for supplying, a fourth pump 20D for sucking the radioactive waste liquid 1 from the tank 10 and supplying it to the fourth adsorption tower 14D, and a fifth pump 20E for sucking the radioactive waste liquid 1 from the tank 10 and supplying it to the fifth adsorption tower 14E. A sixth pump 20F that sucks in the radioactive waste liquid 1 from the tank 10 and supplies it to the sixth adsorption tower 14F; a pipe connecting the tank 10 to the third to sixth pumps 20C to 20F; To F and third to sixth adsorption towers 14C to 14F, respectively.

塩分濃度測定機構１７としては、例えば、イオン電極、電気伝導率計、イオンクロマトグラフィ、誘導結合プラズマ発光分析装置、誘導結合プラズマ質量分析装置、原子吸光光度計が用いられる。塩分濃度測定機構１７では、塩分濃度、Na濃度、Cl濃度の他に、例えば、K濃度、Cs濃度、Mg濃度、Ca濃度、Sr濃度、Ba濃度等を取得しても良い。   As the salt concentration measurement mechanism 17, for example, an ion electrode, an electric conductivity meter, ion chromatography, an inductively coupled plasma emission spectrometer, an inductively coupled plasma mass spectrometer, and an atomic absorption spectrophotometer are used. The salt concentration measuring mechanism 17 may acquire, for example, K concentration, Cs concentration, Mg concentration, Ca concentration, Sr concentration, Ba concentration, etc., in addition to the salt concentration, Na concentration, and Cl concentration.

ところで、吸着剤の吸着性能は上述した放射性廃液１のｐＨの値以外にも、放射性廃液１の塩分濃度によっても変化する。本実施の形態においては、塩分濃度が高い時に適した吸着剤Ｃ，Ｅを充填した第３及び第５吸着塔１４Ｃ，Ｅと、塩分濃度が低い時に適した吸着剤Ｄ，Ｆを充填した第４及び第６吸着塔１４Ｄ，Ｆと備え、吸着剤Ｃ，Ｄの好適ｐＨ範囲を酸性側として、吸着剤Ｅ，Ｆの好適ｐＨ範囲を塩基性側としている。このことにより、放射性廃液１のｐＨおよび塩分濃度において最も高い分配係数を持つ吸着剤を充填した吸着塔を選定し、この選定した吸着塔に放射性廃液１を通水して処理を行うことを特徴とする。   Incidentally, the adsorption performance of the adsorbent varies depending on the salt concentration of the radioactive waste liquid 1 in addition to the pH value of the radioactive waste liquid 1 described above. In the present embodiment, the third and fifth adsorption towers 14C and 14E filled with adsorbents C and E suitable when the salt concentration is high, and the third and fifth adsorption towers D and F filled with adsorbents suitable when the salt concentration is low. With the fourth and sixth adsorption towers 14D and 14F, the preferred pH range of the adsorbents C and D is set to the acidic side, and the preferable pH range of the adsorbents E and F is set to the basic side. Thus, an adsorption tower filled with an adsorbent having the highest partition coefficient at the pH and salt concentration of the radioactive waste liquid 1 is selected, and the radioactive waste liquid 1 is passed through the selected adsorption tower for treatment. And

本実施の形態における吸着剤選定機構１２の吸着剤Ｃ〜Ｆの選定方法について説明する。まず、吸着剤選定機構１２には吸着剤Ｃ，Ｄ，Ｅ，Ｆの各ｐＨおよび塩分濃度における目的物質の分配係数がデータベースとして保存されている。本実施の形態においては、槽１０の放射性廃液１ＡのｐＨがｐＨ＝ａであり、塩分濃度の値がＳｃである場合を例に説明する。   A method of selecting the adsorbents C to F by the adsorbent selection mechanism 12 in the present embodiment will be described. First, the adsorbent selection mechanism 12 stores a distribution coefficient of the target substance at each pH and salt concentration of the adsorbents C, D, E, and F as a database. In the present embodiment, a case where the pH of the radioactive waste liquid 1A in the tank 10 is pH = a and the value of the salt concentration is Sc will be described as an example.

図６Ｂにおいて、吸着剤選定機構１２は、放射性廃液１の塩分濃度の値Ｓｃが予め定めた規定値Ｚを超過しているか否かを判断する（ステップＳ６１）。具体的には、Ｓｃ＞Ｚか否かを判断する。放射性廃液１の塩分濃度の値Ｓｃが規定値Ｚを超過している場合には、ステップＳ６２へ進み、それ以外の場合にはステップＳ６５へ進む。   In FIG. 6B, the adsorbent selection mechanism 12 determines whether or not the salt concentration value Sc of the radioactive waste liquid 1 exceeds a predetermined value Z (step S61). Specifically, it is determined whether Sc> Z. When the value Sc of the salt concentration of the radioactive waste liquid 1 exceeds the specified value Z, the process proceeds to step S62, and otherwise, the process proceeds to step S65.

吸着剤選定機構１２は、塩分濃度が高い領域で吸着性能が高い吸着剤Ｃ，Ｅのうち、ｐＨ＝ａにおいてより高い吸着性能を示す吸着剤を選択する（ステップＳ６２）。具体的には、Ｋｄ，Ｃ（ａ）＜Ｋｄ，Ｅ（ａ）か否かを判断する。ｐＨ＝ａにおける吸着剤Ｅの吸着性能が吸着剤Ｃの吸着性能より高い場合にはステップＳ６３へ進み、それ以外の場合はステップＳ６４へ進む。   The adsorbent selecting mechanism 12 selects an adsorbent exhibiting higher adsorption performance at pH = a from the adsorbents C and E having high adsorption performance in the region where the salt concentration is high (step S62). Specifically, it is determined whether or not Kd, C (a) <Kd, E (a). If the adsorbing performance of the adsorbent E at pH = a is higher than the adsorbing performance of the adsorbent C, the process proceeds to step S63; otherwise, the process proceeds to step S64.

ステップＳ６２において、吸着剤Ｅの吸着性能が吸着剤Ｃの吸着性能より高い場合、吸着剤選定機構１２は、吸着剤Ｅを選択する（ステップＳ６３）。具体的には、吸着剤選定機構１２は、吸着剤Ｅが充填された第５吸着塔１４Ｅを選択し、廃液供給機構１３の第５ポンプ２０Ｅにより放射性廃液１を通水する。 If the adsorption performance of the adsorbent E is higher than the adsorption performance of the adsorbent C in step S62, the adsorbent selection mechanism 12 selects the adsorbent E (step S63). Specifically, the adsorbent selection mechanism 12 selects the fifth adsorption tower 14E filled with the adsorbent E, and allows the radioactive waste liquid 1 to flow through the fifth pump 20E of the waste liquid supply mechanism 13.

ステップＳ６２において、吸着剤Ｅの吸着性能が吸着剤Ｃの吸着性能より高くない場合、吸着剤選定機構１２は、吸着剤Ｃを選択する（ステップＳ６４）。具体的には、吸着剤選定機構１２は、吸着剤Ｃが充填された第３吸着塔１４Ｃを選択し、廃液供給機構１３の第３ポンプ２０Ｃにより放射性廃液１を通水する。   In step S62, when the adsorption performance of the adsorbent E is not higher than the adsorption performance of the adsorbent C, the adsorbent selection mechanism 12 selects the adsorbent C (step S64). Specifically, the adsorbent selection mechanism 12 selects the third adsorption tower 14C filled with the adsorbent C, and allows the radioactive waste liquid 1 to flow through the third pump 20C of the waste liquid supply mechanism 13.

ステップＳ６１において、放射性廃液１の塩分濃度Ｓｃが規定値Ｚを超過していない場合、吸着剤選定機構１２は、塩分濃度が低い領域で吸着性能が高い吸着剤Ｄ，Ｆのうち、ｐＨ＝ａにおいてより高い吸着性能を示す吸着剤を選択する（ステップＳ６５）。具体的には、Ｋｄ，Ｄ（ａ）＜Ｋｄ，Ｆ（ａ）か否かを判断する。ｐＨ＝ａにおける吸着剤Ｆの吸着性能が吸着剤Ｄの吸着性能より高い場合にはステップＳ６６へ進み、それ以外の場合はステップＳ６７へ進む。   In step S61, when the salt concentration Sc of the radioactive waste liquid 1 does not exceed the specified value Z, the adsorbent selecting mechanism 12 sets the pH = a of the adsorbents D and F having high adsorption performance in a low salt concentration region. In step S65, an adsorbent exhibiting higher adsorption performance is selected (step S65). Specifically, it is determined whether or not Kd, D (a) <Kd, F (a). If the adsorption performance of the adsorbent F at pH = a is higher than the adsorption performance of the adsorbent D, the process proceeds to step S66; otherwise, the process proceeds to step S67.

ステップＳ６５において、吸着剤Ｆの吸着性能が吸着剤Ｄの吸着性能より高い場合、吸着剤選定機構１２は、吸着剤Ｆを選択する（ステップＳ６６）。具体的には、吸着剤選定機構１２は、吸着剤Ｆが充填された第６吸着塔１４Ｆを選択し、廃液供給機構１３の第６ポンプ２０Ｆにより放射性廃液１を通水する。 If the adsorption performance of the adsorbent F is higher than the adsorption performance of the adsorbent D in step S65, the adsorbent selection mechanism 12 selects the adsorbent F (step S66). Specifically, the adsorbent selection mechanism 12 selects the sixth adsorption tower 14F filled with the adsorbent F, and allows the radioactive waste liquid 1 to flow through the sixth pump 20F of the waste liquid supply mechanism 13.

ステップＳ６５において、吸着剤Ｆの吸着性能が吸着剤Ｄの吸着性能より高くない場合、吸着剤選定機構１２は、吸着剤Ｄを選択する（ステップＳ６７）。具体的には、吸着剤選定機構１２は、吸着剤Ｄが充填された第４吸着塔１４Ｄを選択し、廃液供給機構１３の第４ポンプ２０Ｄにより放射性廃液１を通水する。   If the adsorption performance of the adsorbent F is not higher than the adsorption performance of the adsorbent D in step S65, the adsorbent selection mechanism 12 selects the adsorbent D (step S67). Specifically, the adsorbent selection mechanism 12 selects the fourth adsorption tower 14D filled with the adsorbent D, and allows the radioactive waste liquid 1 to flow through the fourth pump 20D of the waste liquid supply mechanism 13.

上述した本発明の放射性廃液の処理方法及び処理装置の第６の実施の形態によれば、上述した第１の実施の形態と同様の効果を得ることができる。   According to the above-described sixth embodiment of the method and apparatus for treating a radioactive waste liquid of the present invention, the same effects as those of the first embodiment can be obtained.

また、上述した本発明の放射性廃液の処理方法及び処理装置の第６の実施の形態によれば、吸着剤の吸着性能がより高いｐＨおよび塩分濃度の領域で処理が行え、吸着剤を有効利用できる。また、共存するCaやNaなどによる吸着部位の占有が低減するので、吸着剤における吸着部位の占有による目的物質の吸着性能の低下を抑制できる。   Further, according to the sixth embodiment of the method and apparatus for treating a radioactive liquid waste of the present invention described above, the treatment can be performed in a region where the adsorption performance of the adsorbent is higher and the pH and salt concentration are higher, and the adsorbent is effectively used. it can. In addition, since the occupation of the adsorption site by coexisting Ca, Na, or the like is reduced, a decrease in the adsorption performance of the target substance due to the occupation of the adsorption site in the adsorbent can be suppressed.

以下、本発明の放射性廃液の処理方法及び処理装置の第７の実施の形態を図面を用いて説明する。図７は本発明の放射性廃液の処理方法及び処理装置の第７の実施の形態を構成する放射性廃液処理装置を示す概念図である。図７において、図１Ａ乃至６Ｂに示す符号と同符号のものは同一部分であるので、その詳細な説明は省略する。   Hereinafter, a seventh embodiment of the method and apparatus for treating a radioactive waste liquid according to the present invention will be described with reference to the drawings. FIG. 7 is a conceptual diagram showing a radioactive waste liquid treatment apparatus constituting a seventh embodiment of the radioactive waste liquid treatment method and treatment apparatus of the present invention. 7, the same reference numerals as those shown in FIGS. 1A to 6B denote the same parts, and a detailed description thereof will be omitted.

本発明の放射性廃液の処理方法及び処理装置の第７の実施の形態は、大略第１乃至第６のいずれかの実施の形態に加えて、処理設備１８による処理を併用して行う点が異なる。図７に示すように、本実施の形態を構成する放射性廃液処理装置の槽１０の前段に設置する処理設備１８Ａ、吸着塔１４Ｃ、１４Ｄ、１４Ｅ、１４Ｆの後段に設置する処理設備１８Ｂのいずれか、あるいはその両方で放射性廃液１または２次処理液２Ａを処理する。   The seventh embodiment of the method and apparatus for treating a radioactive liquid waste of the present invention is different from the first to sixth embodiments in that the treatment by the treatment equipment 18 is performed in combination. . As shown in FIG. 7, any one of a processing facility 18A installed before the tank 10 and a processing facility 18B installed after the adsorption towers 14C, 14D, 14E, and 14F of the radioactive liquid waste treatment apparatus constituting the present embodiment. , Or both, to treat the radioactive waste liquid 1 or the secondary treatment liquid 2A.

処理設備１８Ａまたは１８Ｂとしては、例えば、ＭＦ(Microfiltration Membrane)膜、ＲＯ(Reverse Osmosis)膜、コロイド除去フィルタによるろ過処理装置、吸着剤を充填した吸着塔、酸の添加装置、攪拌装置、脱気装置を単独あるいは組み合わせたものが用いられる。吸着塔に充填する吸着剤は、例えば、イオン交換樹脂、キレート樹脂、活性炭、ゼオライトなどが使用できる。処理設備１８では、放射性廃液および処理液中から、イオンの状態の放射性物質、放射性物質を含む錯体、有機物、炭酸イオン、無機塩類を除去する。   Examples of the processing equipment 18A or 18B include, for example, a MF (Microfiltration Membrane) membrane, an RO (Reverse Osmosis) membrane, a filtration treatment apparatus using a colloid removal filter, an adsorption tower filled with an adsorbent, an acid addition apparatus, a stirring apparatus, and a degassing apparatus. A single device or a combination thereof is used. As the adsorbent to be filled in the adsorption tower, for example, an ion exchange resin, a chelate resin, activated carbon, zeolite and the like can be used. The treatment facility 18 removes radioactive substances in the form of ions, complexes containing radioactive substances, organic substances, carbonate ions, and inorganic salts from the radioactive waste liquid and the processing liquid.

放射性廃液１は処理設備１８Ａに通水された後、１次処理液３として槽１０に移送される。槽１０に移送された１次処理液は第１乃至第６のいずれかの実施の形態で処理される。なお、図７では一例として１次処理液３を第６の実施の形態で処理する場合を記載した。吸着塔１４Ｃ、１４Ｄ、１４Ｅ、１４Ｆのいずれかに通水された１次処理液３は、２次処理液２Ａとしてポンプ２０Ｇを通り、処理設備１８Ｂに移送される。処理設備１８Ｂでは２次処理液２Ａを通水して処理液２Ｂを得る。   After the radioactive waste liquid 1 is passed through the processing equipment 18A, it is transferred to the tank 10 as the primary processing liquid 3. The primary processing liquid transferred to the tank 10 is processed in any of the first to sixth embodiments. FIG. 7 shows an example in which the primary processing liquid 3 is processed according to the sixth embodiment. The primary processing liquid 3 that has passed through any of the adsorption towers 14C, 14D, 14E, and 14F is transferred to the processing equipment 18B as a secondary processing liquid 2A through a pump 20G. In the treatment equipment 18B, the treatment liquid 2B is obtained by passing water through the secondary treatment liquid 2A.

上述した本発明の放射性廃液の処理方法及び処理装置の第７の実施の形態によれば、上述した第１の実施の形態と同様の効果を得ることができる。   According to the above-described seventh embodiment of the method and apparatus for treating a radioactive liquid waste of the present invention, the same effects as those of the above-described first embodiment can be obtained.

また、上述した本発明の放射性廃液の処理方法及び処理装置の第７の実施の形態によれば、吸着剤の吸着性能がより高い液性で処理が行えるため、吸着剤が有効利用できる。また、吸着剤で除去できない物質や、処理液中に残留している放射性物質の濃度をより低下させることができる。   Moreover, according to the above-described seventh embodiment of the radioactive liquid treatment method and the treatment apparatus of the present invention, the treatment can be performed with a liquid having a higher adsorbent adsorption performance, so that the adsorbent can be used effectively. Further, the concentration of a substance that cannot be removed by the adsorbent or a radioactive substance remaining in the treatment liquid can be further reduced.

なお、本発明は上述した第１乃至第７の実施の形態に限られるものではなく、様々な変形例が含まれる。上記した実施形態は本発明をわかり易く説明するために詳細に説明したものであり、必ずしも説明した全ての構成を備えるものに限定されるものではない。例えば、ある実施形態の構成の一部を他の実施の形態の構成に置き換えることが可能であり、また、ある実施形態の構成に他の実施の形態の構成を加えることも可能である。また、各実施形態の構成の一部について、他の構成の追加、削除、置換をすることも可能である。   Note that the present invention is not limited to the above-described first to seventh embodiments, and includes various modifications. The above embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described above. For example, part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of one embodiment can be added to the configuration of another embodiment. Further, for a part of the configuration of each embodiment, it is also possible to add, delete, or replace another configuration.

１，１Ａ，１Ｂ：放射性廃液、２，２Ｂ：処理液、２Ａ：２次処理液、３：１次処理液、１０：槽、１０Ａ：第１槽、１０Ｂ：第２槽、１１：ｐＨ測定機構、１２：吸着剤選定機構、１２Ａ：吸着剤及び廃液供給量選定機構、１３，１３Ａ：廃液供給機構、１４Ａ：第１吸着塔、１４Ｂ：第２吸着塔、１４Ｃ：第３吸着塔、１４Ｄ：第４吸着塔、１４Ｅ：第５吸着塔、１４Ｆ：第６吸着塔、１５Ａ：第１ｐＨ緩衝塔、１５Ｂ：第２ｐＨ緩衝塔、１６：ｐＨ緩衝判定機構、１７：塩分濃度測定機構、２０：ポンプ、２０Ａ：第１ポンプ、２０Ｂ：第２ポンプ、２０Ｃ：第３ポンプ、２０Ｄ：第４ポンプ、２０Ｅ：第５ポンプ、２０Ｆ：第６ポンプ、２０Ｔ：移送ポンプ、２０Ａ’：混合比率に応じた供給流量を調整可能な第１ポンプ、２０Ｂ’：混合比率に応じた供給流量を調整可能な第２ポンプ、２０Ａ”：第１ブースターポンプ、２０Ｂ”：第２ブースターポンプ 1, 1A, 1B: radioactive waste liquid, 2 , 2B : processing liquid, 2A: secondary processing liquid, 3: primary processing liquid, 10: tank, 10A: first tank, 10B: second tank, 11: pH measurement Mechanism, 12: adsorbent selection mechanism, 12A: adsorbent and waste liquid supply amount selection mechanism, 13, 13A: waste liquid supply mechanism, 14A: first adsorption tower, 14B: second adsorption tower, 14C: third adsorption tower, 14D : Fourth adsorption tower, 14E: fifth adsorption tower, 14F: sixth adsorption tower, 15A: first pH buffer tower, 15B: second pH buffer tower, 16: pH buffer determination mechanism, 17: salt concentration measurement mechanism, 20: Pump, 20A: first pump, 20B: second pump, 20C: third pump, 20D: fourth pump, 20E: fifth pump, 20F: sixth pump, 20T: transfer pump, 20A ': according to mixing ratio Pump 20B ′ capable of adjusting the supply flow rate : A second pump capable of adjusting the supply flow rate according to the mixing ratio, 20A ″: a first booster pump, 20B ″: a second booster pump

Claims (6)

放射性物質を含む放射性廃液と、前記放射性物質を吸着する吸着剤であって、高い吸着性能を実現する前記放射性廃液のｐＨの範囲である好適ｐＨ範囲が異なる少なくとも２種類の吸着剤と、前記放射性廃液のｐＨを測定するｐＨ測定機構とを備えた放射性廃液の処理装置の処理方法において、
前記ｐＨ測定機構で前記放射性廃液のｐＨを測定する工程と、
測定した前記放射性廃液のｐＨに応じて、前記吸着剤を少なくとも１種類以上使用して前記放射性廃液を処理する工程とを備え、
前記放射性廃液の処理装置は、前記放射性廃液のｐＨが変化した際に、使用している前記吸着剤を他の吸着剤に変更する吸着剤選定機構を更に備え、
変化前の前記放射性廃液のｐＨにおける前記吸着剤の吸着性能を演算する工程と、
変化後の前記放射性廃液のｐＨにおける前記吸着剤の吸着性能を演算する工程と、
変化後の前記放射性廃液のｐＨにおける前記吸着剤の吸着性能に対する変化前の前記放射性廃液のｐＨにおける前記吸着剤の吸着性能の比率Ｒを演算する工程と、
前記比率Ｒと予め定めた規定値とを比較する工程と、
前記比率Ｒが前記規定値を上回る場合に前記吸着剤選定機構により使用している吸着剤を他の吸着剤に変更する工程とを備えた
ことを特徴とする放射性廃液の処理装置の処理方法。 A radioactive waste liquid containing a radioactive substance, and an adsorbent for adsorbing the radioactive substance, wherein at least two types of adsorbents having different suitable pH ranges, which are pH ranges of the radioactive waste liquid realizing high adsorption performance, In a treatment method of a radioactive waste liquid treatment device having a pH measurement mechanism for measuring the pH of the waste liquid,
Measuring the pH of the radioactive waste liquid with the pH measurement mechanism;
Treating the radioactive waste liquid using at least one kind of the adsorbent according to the measured pH of the radioactive waste liquid ,
The apparatus for treating a radioactive waste liquid further includes an adsorbent selecting mechanism for changing the used adsorbent to another adsorbent when the pH of the radioactive waste liquid changes,
Calculating the adsorption performance of the adsorbent at the pH of the radioactive liquid waste before the change,
Calculating the adsorption performance of the adsorbent at the pH of the radioactive waste liquid after the change,
Calculating the ratio R of the adsorption performance of the adsorbent at the pH of the radioactive waste liquid before the change to the adsorption performance of the adsorbent at the pH of the radioactive waste liquid after the change,
Comparing the ratio R with a predetermined specified value;
Changing the adsorbent used by the adsorbent selecting mechanism to another adsorbent when the ratio R exceeds the specified value . A method for treating an apparatus for treating radioactive waste liquid, the method comprising: 放射性物質を含む放射性廃液と、前記放射性廃液を格納する槽と、前記放射性廃液のｐＨを測定するｐＨ測定機構と、前記放射性物質を吸着する吸着剤であって、高い吸着性能を実現する前記放射性廃液のｐＨの範囲である好適ｐＨ範囲が異なる少なくとも２種類の吸着剤と、前記吸着剤をそれぞれに充填した少なくとも２個の吸着塔と、前記ｐＨ測定機構が測定した前記放射性廃液のｐＨに対して、高い吸着性能を示す吸着剤を選定する吸着剤選定機構と、
前記吸着剤選定機構が選定した吸着剤が充填された吸着塔に、前記槽に格納された前記放射性廃液を供給する廃液供給機構とを備えた放射性廃液の処理装置において、
前記吸着剤選定機構は、
前記ｐＨ測定機構が測定した前記放射性廃液のｐＨの履歴を記録する記録部と、
前記記録部に記録された前記放射性廃液のｐＨの履歴から、現在の前記放射性廃液のｐＨが変化した際に、変化後の前記放射性廃液のｐＨにおける前記吸着剤の吸着性能に対する変化前の前記放射性廃液のｐＨにおける前記吸着剤の吸着性能の比率Ｒと予め定めた規定値とを比較する演算部と、
前記演算部において前記比率Ｒが前記規定値を上回る場合に使用している吸着剤を他の吸着剤に変更する制御部とを備えた
ことを特徴とする放射性廃液の処理装置。 A radioactive waste liquid containing a radioactive substance, a tank for storing the radioactive waste liquid, a pH measurement mechanism for measuring the pH of the radioactive waste liquid, and an adsorbent for adsorbing the radioactive substance, wherein the radioactive substance realizing high adsorption performance At least two kinds of adsorbents having different preferred pH ranges that are the pH range of the waste liquid, at least two adsorption towers each filled with the adsorbent, and the pH of the radioactive waste liquid measured by the pH measurement mechanism. Adsorbent selection mechanism to select an adsorbent that exhibits high adsorption performance,
An adsorption tower filled with an adsorbent selected by the adsorbent selection mechanism, a waste liquid supply mechanism for supplying the radioactive waste liquid stored in the tank, a radioactive waste liquid treatment apparatus,
The adsorbent selection mechanism,
A recording unit that records the history of the pH of the radioactive liquid waste measured by the pH measurement mechanism,
From the history of the pH of the radioactive waste liquid recorded in the recording unit, when the current pH of the radioactive waste liquid changes, the radioactivity before the change in the adsorption performance of the adsorbent at the changed pH of the radioactive waste liquid An arithmetic unit for comparing the ratio R of the adsorption performance of the adsorbent at the pH of the waste liquid with a predetermined value,
Apparatus for treating a radioactive liquid waste, characterized in that a control unit for changing the adsorbent to the ratio R in the arithmetic unit is used when greater than the specified value to other adsorbents. 放射性物質を含む放射性廃液と、前記放射性廃液を格納する槽と、前記放射性廃液のｐＨを測定するｐＨ測定機構と、前記放射性物質を吸着する吸着剤であって、前記放射性廃液に対して高い吸着性能を実現するｐＨの範囲である好適ｐＨ範囲が異なる２種類の吸着剤と、前記吸着剤をそれぞれに充填した２個の吸着塔と、前記ｐＨ測定機構が測定した前記放射性廃液のｐＨにおける前記２種類の吸着剤の吸着性能が規定値を超過するか否かを判断し前記２種類の吸着剤の少なくとも１つを選定する吸着剤選定機構と、
前記吸着剤選定機構が選定した吸着剤が充填された選定吸着塔に、前記槽に格納された前記放射性廃液を供給する廃液供給機構とを備えた放射性廃液の処理装置において、
前記２個の吸着塔は直列に設置され、
前記２種類の吸着剤の吸着性能がいずれも前記規定値を超過する場合、
前記吸着剤選定機構は前記２種類の吸着剤を選定し、
前記廃液供給機構は、前記槽に格納された前記放射性廃液を、前記吸着剤選定機構が選定した前記２種類の吸着剤がそれぞれに充填された２個の選定吸着塔のうちの一の選定吸着塔に供給し、前記一の選定吸着塔からの処理液を前記２個の選定吸着塔のうちの他の選定吸着塔に供給し、
前記２種類の吸着剤の少なくとも１つの吸着性能が前記規定値を超過しない場合、
前記吸着剤選定機構は、前記２種類の吸着剤のうち前記ｐＨ測定機構が測定した前記放射性廃液のｐＨにおける吸着性能がより高い吸着剤を選定し、
前記廃液供給機構は、前記２個の吸着塔のうちの前記吸着剤選定機構が選定した吸着剤が充填された選定吸着塔に、前記槽に格納された前記放射性廃液を供給する
ことを特徴とする放射性廃液の処理装置。 A radioactive waste liquid containing a radioactive substance, a tank for storing the radioactive waste liquid, a pH measuring mechanism for measuring the pH of the radioactive waste liquid, and an adsorbent for adsorbing the radioactive substance, which has high adsorption to the radioactive waste liquid Two types of adsorbents having different preferred pH ranges that are ranges of pH for realizing performance, two adsorption towers each filled with the adsorbent, and the pH of the radioactive waste liquid measured by the pH measurement mechanism An adsorbent selection mechanism for determining whether or not the adsorption performance of the two adsorbents exceeds a specified value and selecting at least one of the two adsorbents;
In a radioactive waste liquid treatment apparatus, the selected adsorption tower filled with the adsorbent selected by the adsorbent selection mechanism includes a waste liquid supply mechanism that supplies the radioactive waste liquid stored in the tank .
Before two of the adsorption tower Symbol is placed in series,
When the adsorption performance of the two adsorbents both exceeds the specified value,
The adsorbent selection mechanism selects the two types of adsorbents,
The waste liquid supply mechanism, the radioactive liquid waste is stored in the tank, the one selected adsorption of one of the two selected adsorption tower in which the adsorbent selected mechanism is selected two adsorbent is filled in each It was fed to the column, supplying a process liquid from the one selected adsorption column to another selection adsorption tower of the previous SL two selected adsorption tower,
When at least one adsorption performance of the two types of adsorbent does not exceed the specified value,
The adsorbent selection mechanism selects an adsorbent having a higher adsorption performance at the pH of the radioactive waste liquid measured by the pH measurement mechanism among the two types of adsorbents,
The waste liquid supply mechanism, the two pieces of the adsorbent adsorbent selected mechanism is selected is filled a selected adsorption tower of the adsorption towers, supply the radioactive waste liquid stored in the tank
An apparatus for treating a radioactive liquid waste. 放射性物質を含む放射性廃液と、前記放射性廃液を格納する槽と、前記放射性廃液のｐＨを測定するｐＨ測定機構と、前記放射性物質を吸着する吸着剤であって、高い吸着性能を実現する前記放射性廃液のｐＨの範囲である好適ｐＨ範囲が異なる少なくとも２種類の吸着剤と、前記吸着剤をそれぞれに充填した少なくとも２個の吸着塔と、前記ｐＨ測定機構が測定した前記放射性廃液のｐＨに対して、高い吸着性能を示す吸着剤を選定する吸着剤選定機構と、
前記吸着剤選定機構が選定した吸着剤が充填された選定吸着塔に、前記槽に格納された前記放射性廃液を供給する廃液供給機構とを備えた放射性廃液の処理装置において、
前記放射性廃液は、少なくとも２種類以上の異なるｐＨの放射性廃液により構成され、
前記槽は、前記少なくとも２種類以上の異なるｐＨの放射性廃液が格納された少なくとも２個の槽を備え、
前記廃液供給機構は、前記少なくとも２個の槽に格納された前記放射性廃液を任意の比率で混合し、混合した放射性廃液を前記選定吸着塔に供給する
ことを特徴とする放射性廃液の処理装置。 A radioactive waste liquid containing a radioactive substance, a tank for storing the radioactive waste liquid, a pH measurement mechanism for measuring the pH of the radioactive waste liquid, and an adsorbent for adsorbing the radioactive substance, wherein the radioactive substance realizing high adsorption performance At least two kinds of adsorbents having different preferred pH ranges that are the pH range of the waste liquid, at least two adsorption towers each filled with the adsorbent, and the pH of the radioactive waste liquid measured by the pH measurement mechanism. Adsorbent selection mechanism to select an adsorbent that exhibits high adsorption performance,
In a radioactive waste liquid treatment apparatus, the selected adsorption tower filled with the adsorbent selected by the adsorbent selection mechanism includes a waste liquid supply mechanism that supplies the radioactive waste liquid stored in the tank .
The radioactive waste liquid is composed of at least two or more different types of radioactive waste liquid,
The tank is provided with at least two tanks radioactive liquid waste has been stored for at least two or more different pH,
The waste liquid supply mechanism, the mixing the radioactive liquid waste stored in at least two tanks in any ratio, you supplying a mixed radioactive liquid waste in the selected adsorption tower
An apparatus for treating a radioactive liquid waste. 放射性物質を含む放射性廃液と、前記放射性廃液を格納する槽と、前記放射性廃液のｐＨを測定するｐＨ測定機構と、前記放射性物質を吸着する吸着剤であって、高い吸着性能を実現する前記放射性廃液のｐＨの範囲である好適ｐＨ範囲が異なる少なくとも２種類の吸着剤と、前記吸着剤をそれぞれに充填した少なくとも２個の吸着塔と、前記ｐＨ測定機構が測定した前記放射性廃液のｐＨに対して、高い吸着性能を示す吸着剤を選定する吸着剤選定機構と、
前記吸着剤選定機構が選定した吸着剤が充填された吸着塔に、前記槽に格納された前記放射性廃液を供給する廃液供給機構とを備えた放射性廃液の処理装置において、
前記槽に格納された前記放射性廃液の塩分濃度を測定する塩分濃度測定機構を更に備え、
前記吸着剤選定機構は、前記ｐＨ測定機構が測定した前記放射性廃液のｐＨと、前記塩分濃度測定機構が測定した前記放射性廃液の塩分濃度に応じて高い吸着性能を示す吸着剤を選定する
ことを特徴とする放射性廃液の処理装置。 A radioactive waste liquid containing a radioactive substance, a tank for storing the radioactive waste liquid, a pH measurement mechanism for measuring the pH of the radioactive waste liquid, and an adsorbent for adsorbing the radioactive substance, wherein the radioactive substance realizing high adsorption performance At least two kinds of adsorbents having different preferred pH ranges that are the pH range of the waste liquid, at least two adsorption towers each filled with the adsorbent, and the pH of the radioactive waste liquid measured by the pH measurement mechanism. Adsorbent selection mechanism to select an adsorbent that exhibits high adsorption performance,
An adsorption tower filled with an adsorbent selected by the adsorbent selection mechanism, a waste liquid supply mechanism for supplying the radioactive waste liquid stored in the tank, a radioactive waste liquid treatment apparatus,
The apparatus further includes a salt concentration measuring mechanism for measuring a salt concentration of the radioactive waste liquid stored in the tank,
The adsorbent selection mechanism selects an adsorbent exhibiting high adsorption performance according to the pH of the radioactive waste liquid measured by the pH measurement mechanism and the salt concentration of the radioactive waste liquid measured by the salt concentration measurement mechanism. Characteristic radioactive waste liquid treatment equipment. 請求項２から５のいずれか１項に記載の放射性廃液の処理装置において、
前記槽の前段、前記吸着塔の後段の少なくとも１箇所に、ろ過処理装置、吸着剤を充填した吸着塔、酸の添加装置、攪拌装置、脱気装置のなかから少なくとも１種類の処理装置を備える
ことを特徴とする放射性廃液の処理装置。 An apparatus for treating a radioactive liquid waste according to any one of claims 2 to 5 ,
At least one of a filtration device, an adsorption column filled with an adsorbent, an acid addition device, a stirring device, and a deaeration device is provided at least at one location before the tank and after the adsorption tower. An apparatus for treating a radioactive liquid waste.
JP2016146904A 2016-07-27 2016-07-27 Method and apparatus for treating radioactive liquid waste Active JP6656108B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2016146904A JP6656108B2 (en) 2016-07-27 2016-07-27 Method and apparatus for treating radioactive liquid waste

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2016146904A JP6656108B2 (en) 2016-07-27 2016-07-27 Method and apparatus for treating radioactive liquid waste

Publications (3)

Publication Number Publication Date
JP2018017565A JP2018017565A (en) 2018-02-01
JP2018017565A5 JP2018017565A5 (en) 2019-03-07
JP6656108B2 true JP6656108B2 (en) 2020-03-04

Family

ID=61076159

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2016146904A Active JP6656108B2 (en) 2016-07-27 2016-07-27 Method and apparatus for treating radioactive liquid waste

Country Status (1)

Country Link
JP (1) JP6656108B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7068127B2 (en) * 2018-10-02 2022-05-16 株式会社東芝 Waste liquid treatment method and waste liquid treatment device
KR102624080B1 (en) * 2023-07-28 2024-01-12 한국건설기술연구원 Mobile radioactive contaminated water treatment system for simultaneous removal of high-concentration multi-nuclide

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63132199A (en) * 1986-11-21 1988-06-04 株式会社日立製作所 Method of processing waste liquor containing fission product
JP5880851B2 (en) * 2012-06-15 2016-03-09 株式会社神戸製鋼所 Radionuclide decontamination system and radionuclide decontamination method
JP6080534B2 (en) * 2012-09-19 2017-02-15 日立造船株式会社 Method of removing radioactive cesium from wastewater and storing it stably
JP2014163843A (en) * 2013-02-26 2014-09-08 Toshiba Corp Cleaning acid recycling method and recycling facility
GB2533497B (en) * 2013-08-23 2017-12-20 Hitachi Ge Nuclear Energy Ltd Method of treating radioactive liquid waste and radioactive liquid waste treatment apparatus
JP2015125072A (en) * 2013-12-26 2015-07-06 三菱重工業株式会社 Wastewater treatment device and wastewater treatment method

Also Published As

Publication number Publication date
JP2018017565A (en) 2018-02-01

Similar Documents

Publication Publication Date Title
US9799418B2 (en) Method of treating radioactive liquid waste and radioactive liquid waste treatment apparatus
BRPI0610715A2 (en) water treatment method and system and environment regeneration method in water treatment system with electrodeionization device
CN101218012A (en) Regenareation of adsorption media within an electrodeionization device
JP5880851B2 (en) Radionuclide decontamination system and radionuclide decontamination method
JP6656108B2 (en) Method and apparatus for treating radioactive liquid waste
JP6046582B2 (en) Method for treating radioactive liquid waste and apparatus for treating radioactive liquid waste
Hansen et al. Use of iron oxide-coated sand to remove strontium from simulated Hanford tank wastes
KR101551233B1 (en) Treatment method for radioactive wastewater generated in severe accident in nuclear power plant
WO2016178218A1 (en) Nitrate removal by ion exchange and bioregeneration
JP2016223905A (en) Radioactive liquid effluent processor and processing method thereof
JP6125960B2 (en) Method for treating radioactive liquid waste and apparatus for treating radioactive liquid waste
JP2019070581A (en) Contamination water processing method, contamination water processing system and sodium compound addition device used therefor
JP6651382B2 (en) Wastewater treatment method and wastewater treatment device
RU2442756C1 (en) Way to get desalted water and highly pure water for nuclear power plants in research centres
JP6688157B2 (en) Apparatus and method for treating radioactive waste liquid
JP6879791B2 (en) Radioactive contaminated water treatment equipment, radioactive contaminated water treatment system
JP7311322B2 (en) water purifier
JP7128139B2 (en) Radioactive waste liquid treatment method and radioactive waste liquid treatment system
KR102624080B1 (en) Mobile radioactive contaminated water treatment system for simultaneous removal of high-concentration multi-nuclide
JP2022164323A (en) Radioactive waste liquid treatment method
JP7068127B2 (en) Waste liquid treatment method and waste liquid treatment device
Figueiredo Microporous materials for Cs+ sensing and selective removal from aqueous solutions
JP6783192B2 (en) How to operate the boron recycling system and the boron recycling system
JP2020003248A (en) Radioactive waste liquid processor and method for processing radioactive waste liquid
JP2023017379A (en) Radioactive waste liquid treatment system, and method of radioactive waste liquid treatment

Legal Events

Date Code Title Description
A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20161201

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20190122

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20190122

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20190913

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20190924

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20191023

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20200121

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20200204

R150 Certificate of patent or registration of utility model

Ref document number: 6656108

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150