JPH0829591A - Method and container for containing radioactive contaminant - Google Patents
Method and container for containing radioactive contaminantInfo
- Publication number
- JPH0829591A JPH0829591A JP6164343A JP16434394A JPH0829591A JP H0829591 A JPH0829591 A JP H0829591A JP 6164343 A JP6164343 A JP 6164343A JP 16434394 A JP16434394 A JP 16434394A JP H0829591 A JPH0829591 A JP H0829591A
- Authority
- JP
- Japan
- Prior art keywords
- gas insertion
- gas
- insertion port
- container body
- container
- 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.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Packages (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、放射能汚染物の収納方
法及びその収納容器に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for accommodating radioactive contaminants and an accommodating container thereof.
【０００２】[0002]
【従来の技術】原子力発電プラント等で発生する放射能
汚染物を長期間保管する貯蔵庫の例として、実開平３−
１２５２９９号や特開平３−２７３１９３号に示す技術
が提案されている。2. Description of the Related Art As an example of a storage for long-term storage of radioactive pollutants generated in a nuclear power plant, etc.
The techniques shown in Japanese Patent No. 125299 and Japanese Patent Laid-Open No. 3-273193 have been proposed.
【０００３】前者の技術では、ガラス固化パッケージと
したものを収納管に収納して、収納管の回りに自然対流
により冷却空気を挿通させて、強制循環装置を使用する
ことなくガラス固化パッケージを冷却するようにしてい
る。後者の技術では、使用済燃料集合体をキャニスタに
装填したものを貯蔵庫の収納管に収納して、自然対流に
よる冷却に加えて収納管の内部空気を強制的に入れ替
え、冷却効率を向上させるようにしている。In the former technique, a vitrified package is stored in a storage tube, and cooling air is passed around the storage tube by natural convection to cool the vitrified package without using a forced circulation device. I am trying to do it. In the latter technology, the spent fuel assemblies loaded in the canister are stored in the storage tube of the storage, and in addition to cooling by natural convection, the internal air of the storage tube is forcibly replaced to improve cooling efficiency. I have to.
【０００４】そして、使用済み燃料集合体にあっては、
ウラン燃料の価格の低下やプルトニウムの需要の減少等
に基づいて、使用済燃料集合体を再処理することなく、
例えば原子炉の燃料プールに保管する対策が行なわれて
いるが、燃料プールの収容量に限度があるため、前述し
た貯蔵庫まで移送して収納する必要が生じる。And, in the spent fuel assembly,
Without reprocessing spent fuel assemblies based on lower prices for uranium fuel, lower demand for plutonium, etc.
For example, although measures have been taken to store the fuel in the fuel pool of the nuclear reactor, since the capacity of the fuel pool is limited, it is necessary to transfer it to the above-mentioned storage and store it.
【０００５】一方、使用済み燃料集合体を貯蔵庫に収納
する場合には、使用済み燃料集合体を収納容器に装填す
るとともに、収納容器の内部にヘリウムガスを充填して
熱伝達性を高めた状態で密封することが望ましい。ヘリ
ウムガスを収納容器に充填する方法として、例えば特開
昭５９−１６３５９９号や特開昭５９−１６８３９７号
が提案されている。On the other hand, when the spent fuel assembly is stored in the storage, the spent fuel assembly is loaded into the storage container, and the inside of the storage container is filled with helium gas to enhance the heat transfer property. It is desirable to seal with. As a method of filling a helium gas into a storage container, for example, JP-A-59-163599 and JP-A-59-168397 have been proposed.
【０００６】[0006]
【発明が解決しようとする課題】しかし、上述例のヘリ
ウムガス充填方法を採用した場合、収納容器の内部にヘ
リウムガスを充填して漏洩検査を行なうことができる
が、ヘリウムガスを１００％充填することが困難で、空
気等の他の気体が残留してしまうという課題が残され
る。また、上記した特開昭５９−１６３５９９号に記載
されている一技術例のように、収納容器に蓋を途中まで
被せて間隙に挿入したノズルから容器内にヘリウムガス
を吹き込む方法であっても、空気を１００％ヘリウムガ
スに置換することは困難である。However, when the helium gas filling method of the above-mentioned example is adopted, the inside of the container can be filled with helium gas for leakage inspection, but 100% of helium gas is filled. However, there is a problem that other gas such as air remains. Further, as in the above-mentioned technical example described in JP-A-59-163599, a method of blowing a helium gas into the container from a nozzle inserted in a gap with a lid partially covering the container is also possible. However, it is difficult to replace air with 100% helium gas.
【０００７】本発明は、かかる事情に鑑みてなされたも
ので、以下の目的を達成しようとしている。 ａ）不活性ガス充填時の空気との置換性を高め作業性を
向上させること。 ｂ）開口部を吊り具と兼用状態の１箇所のみとして構造
の単純化を図ること。The present invention has been made in view of such circumstances, and aims to achieve the following objects. a) To enhance workability by enhancing the replaceability with air when filling the inert gas. b) The structure should be simplified with only one opening that is also used as a suspender.
【０００８】[0008]
【課題を解決するための手段】放射能汚染物を容器本体
の内部に密閉状態に収納する方法として、容器本体の内
部に放射能汚染物を装填する工程と、容器本体に上蓋を
溶接してガス挿通口の部分を除いて密封する工程と、ガ
ス挿通口を介して容器本体の内部空気を排除する工程
と、容器本体の内部に不活性ガスを充填してガス挿通口
を閉塞する工程と、ガス挿通口における閉塞部分より外
方に溶接プラグを挿入しガス挿通口の内縁部との間のシ
ール溶接部の形成により密封状態とする工程とを有する
技術が採用される。上記の方法に加えて、ガス挿通口を
閉塞する工程における閉塞手段として、ガス挿通口に内
向き状態に配された弁座に、弾発部材の弾発力により弁
体を外方に移動させて緊密に接触させる技術や、内部空
気の排除時及び不活性ガスの充填時に、弁体を内方に移
動させてガス挿通口を挿通状態とする技術が採用され
る。放射能汚染物の収納容器として、放射能汚染物を収
納する容器本体と、該容器本体のガス挿通口の内部に配
され弾発部材による外方への弾発力によりガス挿通口を
閉鎖状態とする弁体と、ガス挿通口に挿入状態に配され
ガス挿通口の内縁部とのシール溶接部の形成により密封
状態とする溶接プラグとを具備する構成が採用される。
この放射能汚染物の収納容器に、弁体に溶接プラグが一
体化状態に配される技術や、ガス挿通口が上方に突出状
態に形成されるとともに、ガス挿通口の回りに上部を拡
径した吊持部が配される技術が付加される。[MEANS FOR SOLVING THE PROBLEMS] As a method for hermetically storing radioactive contaminants inside a container body, a step of loading the radioactive contaminants inside the container body and welding an upper lid to the container body. A step of sealing except for the gas insertion port, a step of eliminating the internal air of the container body through the gas insertion port, and a step of filling the inside of the container body with an inert gas to close the gas insertion port. , A step of inserting a welding plug outside the closed portion of the gas insertion port and forming a seal welding portion between the gas insertion port and the inner edge portion of the gas insertion port to establish a sealed state. In addition to the above method, as a closing means in the step of closing the gas insertion opening, a valve seat arranged inwardly in the gas insertion opening is moved outward by the elastic force of the elastic member. And a technique for bringing the gas insertion port into an inserted state by moving the valve body inward when the internal air is removed and the inert gas is filled. As a container for storing radioactive contaminants, a container main body for storing radioactive contaminants, and a state in which the gas insertion port is closed by an outward elastic force of an elastic member arranged inside the gas insertion port of the container main body And a welding plug that is placed in the gas insertion port and is sealed by forming a seal weld with the inner edge of the gas insertion port.
In this radioactive contaminant storage container, a technology in which a welding plug is integrated with the valve body, a gas insertion port is formed to project upward, and the upper part is expanded around the gas insertion port. A technique for arranging the suspended portion is added.
【０００９】[0009]
【作用】放射能汚染物を容器本体の内部に密閉する際に
は、容器本体の内部に放射能汚染物を装填した状態で、
容器本体に上蓋を溶接するとともに、容器本体の内部空
気をガス挿通口を介して吸引することにより排除した
後、不活性ガスを充填してガス挿通口を閉塞することに
より行なわれる。そして、ガス挿通口に溶接プラグを挿
入し、ガス挿通口の内縁部との間にシール溶接部を形成
することにより、二重に密封した状態となる。弾発部材
により弁体を移動させて、ガス挿通口を閉塞しておくこ
とにより、定常状態における容器本体の密封性が確保さ
れる。内部空気を排除する際には、弁体を弾発力に抗し
て内方に移動させて弁座を開放した状態で、内部空気の
吸引により真空度を高め、弁座を開放した状態で不活性
ガスを真空雰囲気中に充填することが行なわれ、弁体を
解放すると、弾発部材によってガス挿通口が弁座の部分
で閉塞される。ガス挿通口を閉塞したまま挿通口に溶接
プラグを挿入して、ガス挿通口の縁部との間にシール溶
接部を形成すると、溶接金属が間隙を埋めることにより
ガス挿通口の閉塞と溶接プラグの一体化とが行なわれ
る。ガス挿通口の回りに配した吊持部により放射能汚染
物を容器に収納した状態で、吊持運搬等が行なわれる。[Function] When the radioactive contaminants are sealed inside the container body, the radioactive contaminants are loaded inside the container body,
This is performed by welding the upper lid to the container body, removing the air inside the container body by sucking it through the gas insertion port, and then filling it with an inert gas to close the gas insertion port. Then, a welding plug is inserted into the gas insertion port, and a seal weld is formed between the gas insertion port and the inner edge portion of the gas insertion port, whereby a double sealed state is achieved. The valve body is moved by the elastic member to close the gas insertion port, so that the container main body can be hermetically sealed in a steady state. When removing the internal air, move the valve body inward against the elastic force to open the valve seat, and increase the degree of vacuum by sucking the internal air to open the valve seat. When a vacuum atmosphere is filled with an inert gas and the valve body is released, the gas insertion port is closed at the valve seat portion by the elastic member. When a welding plug is inserted into the insertion port while the gas insertion port is closed and a seal weld is formed between the gas insertion port and the edge of the gas insertion port, the weld metal fills the gap and closes the gas insertion port and the welding plug. Are integrated. Suspending and transporting is carried out with the radioactive contaminant contained in the container by the suspending section arranged around the gas insertion port.
【００１０】[0010]
【実施例】以下、本発明に係る放射能汚染物の収納方法
及びその収納容器の一実施例について、図１ないし図５
に示す工程順に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a method for storing radioactive contaminants and a container for storing the same according to the present invention will be described below with reference to FIGS.
The steps will be described in order.
【００１１】図１は、ステンレス鋼等の金属製の容器本
体１の内部に、使用済み燃料等の放射能汚染物Ｘを装填
する工程の実施状況を示すものである。該放射能汚染物
Ｘの装填工程にあっては、上蓋２を外した状態で行なわ
れる。FIG. 1 shows a state of implementation of a step of loading a radioactive contaminant X such as a spent fuel into a container body 1 made of metal such as stainless steel. The step of loading the radioactive contaminant X is performed with the upper lid 2 removed.
【００１２】図２は、放射能汚染物Ｘを装填した状態の
容器本体１に、上蓋２を被せる工程の実施状況を示すも
のである。該上蓋２を被せる工程の後、容器本体１と上
蓋２との合わせ目に溶接を施し、周溶接部３の形成によ
り両者の一体化とガス挿通口４の部分を除く密封が行な
われる。FIG. 2 shows an implementation state of the step of covering the container body 1 loaded with the radioactive contaminant X with the upper lid 2. After the step of covering the upper lid 2, welding is performed at the joint between the container body 1 and the upper lid 2, and the peripheral welded portion 3 is formed so that they are integrated and sealed except for the gas insertion port 4.
【００１３】図３は、容器本体１の内部空気の排除によ
る真空引き工程と、その後の不活性ガス充填工程の実施
状況を示すものである。ガス挿通口４に、配管５及び制
御弁６Ａ，６Ｂを経由して真空ポンプ７及び不活性ガス
供給手段８を接続しておいて、以下の工程が実施され
る。FIG. 3 shows the state of implementation of the vacuuming process by eliminating the internal air of the container body 1 and the subsequent inert gas filling process. The vacuum pump 7 and the inert gas supply means 8 are connected to the gas insertion port 4 via the pipe 5 and the control valves 6A and 6B, and the following steps are carried out.
【００１４】真空ポンプ７の作動、制御弁６Ａの開放及
び制御弁６Ｂの閉塞により、ガス挿通口４を介して容器
本体１の内部空気を吸引して排除し、容器本体１の内部
を高真空状態とする。By operating the vacuum pump 7, opening the control valve 6A and closing the control valve 6B, the air inside the container body 1 is sucked and eliminated through the gas insertion port 4, and the inside of the container body 1 is exposed to a high vacuum. State.
【００１５】所望の真空度が得られた後、制御弁６Ａの
閉塞、不活性ガス供給手段８の作動、制御弁６Ｂの開放
により、真空雰囲気の容器本体１の内部にガス挿通口４
を経由して不活性ガスを充填する。この際の不活性ガス
供給手段８は、ヘリウムガスボンベ等とされ、純度の高
いヘリウムガスを容器本体１の内部に充填することによ
り、容器本体１の内部がヘリウムガス雰囲気に置換され
る。After the desired degree of vacuum is obtained, by closing the control valve 6A, operating the inert gas supply means 8 and opening the control valve 6B, the gas insertion port 4 is inserted into the container body 1 in a vacuum atmosphere.
Fill with inert gas via. The inert gas supply means 8 at this time is a helium gas cylinder or the like, and the interior of the container body 1 is replaced with a helium gas atmosphere by filling the interior of the container body 1 with high-purity helium gas.
【００１６】ここで、ガス挿通口４の構造について説明
する。ガス挿通口４は、上蓋２の一部を構成するように
予め配されるものであり、図４に示すように、外方（上
方）に突出状態に形成されるとともに、内外を連通状態
とする流路１１の途中に弁室１２が形成され、該弁室１
２における外方位置に下向き状態の弁座１３が設けら
れ、弁室１２の内部に、弾発部材１４の弾発力により外
方に付勢された状態の弁体１５が設けられる。なお、弁
室１２には、弁体１５の直線移動を案内するとともに、
弾発部材１４のずれを抑制するためのスリーブ状等のガ
イド１６Ａ，１６Ｂが設けられる。Now, the structure of the gas insertion port 4 will be described. The gas insertion port 4 is arranged in advance so as to form a part of the upper lid 2, and as shown in FIG. 4, it is formed in a protruding state outward (upward) and has a communication state between the inside and the outside. The valve chamber 12 is formed in the middle of the flow path 11
A valve seat 13 in a downward state is provided at an outer position of 2, and a valve body 15 is provided inside the valve chamber 12 in a state of being urged outward by an elastic force of an elastic member 14. In addition to guiding the linear movement of the valve body 15 to the valve chamber 12,
Sleeve-shaped guides 16A and 16B for suppressing the displacement of the elastic member 14 are provided.
【００１７】そして、ガス挿通口４の回りには、上部を
拡径した鍔状の吊持部１７が配され、該吊持部１７を利
用して放射能汚染物Ｘを収納した状態の容器の吊持が行
なわれるとともに、ガス挿通口４の先端内縁部には、肉
を薄くした状態の溶接リップ１８が設けられる。Around the gas insertion port 4, a brim-shaped suspending portion 17 having an enlarged upper portion is arranged, and the container in which the radioactive contaminant X is stored by using the suspending portion 17. And the welding lip 18 with thin meat is provided at the inner edge of the tip of the gas insertion port 4.
【００１８】また、ガス挿通口４の流路１１には、弁体
１５を操作するための接続具１９や、図５に示す溶接プ
ラグ２０が選択的に挿入あるいは固定される。Further, a connection tool 19 for operating the valve body 15 and a welding plug 20 shown in FIG. 5 are selectively inserted or fixed in the flow path 11 of the gas insertion port 4.
【００１９】前記接続具１９にあっては、図４に示すよ
うに、前述した配管５に接続される小径管部１９ａの下
端部に、小径管部１９ａの内外を接続した状態に接続孔
１９ｂが形成され、小径管部１９ａの上部位置に、フラ
ンジ部１９ｃ及びシール部材１９ｄが配される。そし
て、フランジ部１９ｃ及びシール部材１９ｄにあって
は、小径管部１９ａの先端が弁体１５に接触した状態
で、ガス挿通口４の上端部に対して間隙Ｇを形成する寸
法関係に設定される。In the connector 19, as shown in FIG. 4, the connection hole 19b is connected to the lower end of the small-diameter pipe portion 19a connected to the pipe 5 as described above. Is formed, and the flange portion 19c and the seal member 19d are arranged at the upper position of the small diameter pipe portion 19a. The flange portion 19c and the seal member 19d are set to have a dimensional relationship that forms a gap G with respect to the upper end portion of the gas insertion port 4 in a state where the tip of the small diameter pipe portion 19a is in contact with the valve body 15. It
【００２０】以下、容器本体１の真空引き工程と不活性
ガス充填工程との詳細について説明する。容器本体１の
真空引き作業は、図４に示すように、ガス挿通口４に、
配管５に接続状態の接続具１９を挿入するとともに、間
隙Ｇの分だけ鎖線で示す位置まで接続具１９を押し下げ
て、弁体１５の下降により流路１１を開放するととも
に、フランジ部１９ｃ及びシール部材１９ｄをガス挿通
口４の上端部（図４にあっては溶接リップ１８）に押圧
してシール性を生じさせてから、図３に示す真空ポンプ
７の作動により行なわれる。容器本体１の内部を高真空
状態とした後、制御弁６Ａ，６Ｂの切り替え及び不活性
ガス供給手段８の作動により、不活性ガスの充填が行な
われる。Details of the vacuuming process and the inert gas filling process for the container body 1 will be described below. For vacuuming the container body 1, as shown in FIG.
The connection tool 19 in the connected state is inserted into the pipe 5, and the connection tool 19 is pushed down to the position indicated by the chain line by the gap G, the valve body 15 is lowered to open the flow path 11, and the flange portion 19c and the seal are provided. The member 19d is pressed against the upper end portion (the welding lip 18 in FIG. 4) of the gas insertion port 4 to generate the sealing property, and then the vacuum pump 7 shown in FIG. 3 operates. After the inside of the container body 1 is set to a high vacuum state, the inert gas is filled by switching the control valves 6A and 6B and operating the inert gas supply means 8.
【００２１】不活性ガスの充填後、接続具１９を速やか
に引き上げると、弾発部材１４の弾発力により弁体１５
が図４の実線の位置に瞬時に戻されて、ガス挿通口４が
閉塞状態に復元する。When the connecting tool 19 is quickly pulled up after filling with the inert gas, the valve element 15 is driven by the elastic force of the elastic member 14.
Is instantly returned to the position indicated by the solid line in FIG. 4, and the gas insertion port 4 is restored to the closed state.
【００２２】一方、前記溶接プラグ２０にあっては、図
５に示すように、ガス挿通口４に挿入してシール溶接部
２１を形成することにより密封状態を得るものであり、
上端部に、溶接リップ１８に対して溶接時の熱容量を合
わせるためのリップ部２２が設けられるとともに、該リ
ップ部２２の外周部に、溶接金属を流下させるための切
欠部２３が形成されている。On the other hand, in the welding plug 20, as shown in FIG. 5, a sealed state is obtained by inserting the welding plug 20 into the gas insertion port 4 and forming a seal welding portion 21.
A lip portion 22 for adjusting the heat capacity at the time of welding to the welding lip 18 is provided at the upper end portion, and a notch portion 23 for allowing the weld metal to flow down is formed on the outer peripheral portion of the lip portion 22. .
【００２３】したがって、接続具１９を撤去した後に、
図５の左半分に示すように、ガス挿通口４に溶接プラグ
２０を挿入して、溶接リップ１８とリップ部２２との間
の溶接を行ない、図５の右半分に示すシール溶接部２１
を形成することにより、溶接プラグ２０の閉塞と固定と
が行なわれる。この際に、切欠部２３が形成されている
と、シール溶接部２１の形成時の溶接金属が、切欠部２
３及びクリアランスＣに流下して埋め、図５の右半分に
示すように、ガス挿通口４と溶接プラグ２０との一体化
が図られるとともに、シール溶接部２１のシール性が確
保される。Therefore, after removing the connector 19,
As shown in the left half of FIG. 5, the welding plug 20 is inserted into the gas insertion port 4 to weld between the welding lip 18 and the lip portion 22, and the seal welding portion 21 shown in the right half of FIG.
By forming the, the plug 20 is closed and fixed. At this time, if the notch 23 is formed, the weld metal at the time of forming the seal weld 21 is not the notch 2
As shown in the right half of FIG. 5, the gas insertion port 4 and the welding plug 20 are integrated with each other, and the sealing property of the seal welding portion 21 is secured.
【００２４】なお、放射能汚染物Ｘを弁体１５及び溶接
プラグ２０で二重に密閉した容器、つまり、放射能汚染
物収納体Ｐは、遠隔操作等により吊持部１７を使用して
吊持され、必要箇所への移送等にが実施される。The container in which the radioactive contaminant X is doubly sealed by the valve element 15 and the welding plug 20, that is, the radioactive contaminant container P is hung by the suspending section 17 by remote control or the like. It will be carried and will be transferred to the necessary places.
【００２５】次いで、図６は、本発明に係る放射能汚染
物の収納容器の他の実施例を示すもので、弁体１５と溶
接プラグ２０とを一体化状態としたものが適用される。
該他の実施例にあっては、予め溶接プラグ２０が弁体１
５に組み込まれているため、溶接プラグ２０の部分の挿
入作業が省略されるものの、その他については前述の一
実施例に準じて実施される。Next, FIG. 6 shows another embodiment of the radioactive contaminant storage container according to the present invention, in which the valve body 15 and the welding plug 20 are integrated.
In the other embodiment, the welding plug 20 is previously attached to the valve body 1.
5, the insertion work of the portion of the welding plug 20 is omitted, but the rest is performed according to the above-described embodiment.
【００２６】[0026]
【発明の効果】本発明に係る放射能汚染物の収納方法及
びその収納容器によれば、以下の効果を奏する。 （１） ガス挿通口の部分を除いて密封しておいて、容
器本体の内部空気を排除するとともに、容器本体の内部
に不活性ガスを充填してガス挿通口を閉塞した後、ガス
挿通口に溶接プラグを挿入してシール溶接部の形成によ
り密封状態とするものであるから、不活性ガス充填時の
空気との置換性を飛躍的に向上させることができる。 （２） 内向き状態に配された弁座に、弾発力により弁
体を外方に移動させてガス挿通口を閉塞することによ
り、閉塞を容易にして不活性ガス充填時の作業性を向上
させることができる。 （３） 弁座及び弁体を組み合わせ、弁体を内方に移動
させてガス挿通口を挿通状態とすることにより、内部空
気の排除及び不活性ガスの充填作業に関連する接続及び
その解除を効率よく実施することができる。 （４） 弁体と溶接プラグとを一体化状態とすることに
より、構造の単純化とガス挿通口の閉塞作業の省力化と
を図ることができる。 （５） ガス挿通口が突出状態に形成され、ガス挿通口
の回りに上部を拡径した吊持部が配されることにより、
開口部を吊り具と兼用状態の１箇所のみとして構造の単
純化を図ることができる。EFFECTS OF THE INVENTION The method of storing radioactive contaminants and the container for storing the same according to the present invention have the following effects. (1) The gas insertion port is sealed except for the air inside the container body, and the inside of the container body is filled with an inert gas to close the gas insertion port, and then the gas insertion port is closed. Since a welding plug is inserted into the to form a sealed welded portion so as to form a sealed state, it is possible to dramatically improve the replaceability with air when the inert gas is filled. (2) The valve seat is arranged in the inward direction, and the valve body is moved outward by the elastic force to close the gas insertion port, thereby facilitating the closing and improving the workability when filling the inert gas. Can be improved. (3) By combining the valve seat and the valve body and moving the valve body inward so that the gas insertion port is in the inserted state, connection and disconnection related to the removal of the internal air and the inert gas filling work are performed. It can be implemented efficiently. (4) By integrating the valve body and the welding plug, the structure can be simplified and labor for closing the gas insertion port can be saved. (5) Since the gas insertion port is formed in a protruding state and the suspension part having an enlarged upper portion is arranged around the gas insertion port,
It is possible to simplify the structure by providing only one place where the opening is also used as the hanging tool.
【図１】本発明に係る放射能汚染物の収納方法の一実施
例における放射能汚染物の装填状況を示す正断面図であ
る。FIG. 1 is a front sectional view showing a loading state of radioactive contaminants in an embodiment of a method for storing radioactive contaminants according to the present invention.
【図２】本発明に係る放射能汚染物の収納方法の一実施
例における容器本体に上蓋を被せる工程の実施状況を示
す正断面図である。FIG. 2 is a front sectional view showing an implementation state of a step of covering a container body with an upper lid in an embodiment of the method for storing radioactive contaminants according to the present invention.
【図３】本発明に係る放射能汚染物の収納方法の一実施
例における真空引き工程及び不活性ガス充填工程の実施
状況を示すブロック図を併記した正断面図である。FIG. 3 is a front cross-sectional view showing a block diagram together with a block diagram showing an implementation state of a vacuuming step and an inert gas filling step in an embodiment of the radioactive contaminant storage method according to the present invention.
【図４】本発明に係る放射能汚染物の収納容器の一実施
例における要部を示す正断面図である。FIG. 4 is a front sectional view showing a main part of an embodiment of a container for storing radioactive contaminants according to the present invention.
【図５】本発明に係る放射能汚染物の収納容器の一実施
例におけるガス挿通口の閉塞状況を左右に分けて示す正
断面図である。FIG. 5 is a front cross-sectional view showing the closed state of the gas insertion port in the embodiment of the radioactive contaminant storage container according to the present invention, which is divided into left and right.
【図６】本発明に係る放射能汚染物の収納容器の他の一
実施例におけるガス挿通口の閉塞状況を示す正断面図で
ある。FIG. 6 is a front cross-sectional view showing a closed state of a gas insertion port in another embodiment of the storage container for radioactive contaminants according to the present invention.
Ｘ 放射能汚染物 Ｇ 間隙 Ｃ クリアランス Ｐ 放射能汚染物収納体 １ 容器本体 ２ 上蓋 ３ 周溶接部 ４ ガス挿通口 ５ 配管 ６Ａ，６Ｂ 制御弁 ７ 真空ポンプ ８ 不活性ガス供給手段 １１ 流路 １２ 弁室 １３ 弁座 １４ 弾発部材 １５ 弁体 １６Ａ，１６Ｂ ガイド １７ 吊持部 １８ 溶接リップ １９ 接続具 １９ａ 小径管部 １９ｂ 接続孔 １９ｃ フランジ部 １９ｄ シール部材 ２０ 溶接プラグ ２１ シール溶接部 ２２ リップ部 ２３ 切欠部 X Radioactive contaminant G Gap C Clearance P Radioactive contaminant container 1 Container body 2 Upper lid 3 Circumferential weld 4 Gas insertion port 5 Piping 6A, 6B Control valve 7 Vacuum pump 8 Inert gas supply means 11 Flow path 12 Valve Chamber 13 Valve seat 14 Repulsive member 15 Valve body 16A, 16B Guide 17 Suspension part 18 Welding lip 19 Connector 19a Small diameter tube part 19b Connection hole 19c Flange part 19d Sealing member 20 Welding plug 21 Seal welding part 22 Lip part 23 Notch Department
Claims (6)
内部に密閉状態に収納する方法であって、容器本体の内
部に放射能汚染物を装填する工程と、容器本体に上蓋
（２）を溶接してガス挿通口（４）の部分を除いて密封
する工程と、ガス挿通口を介して容器本体の内部空気を
排除する工程と、容器本体の内部に不活性ガスを充填し
てガス挿通口を閉塞する工程と、ガス挿通口における閉
塞部分より外方に溶接プラグ（２０）を挿入しガス挿通
口の内縁部との間のシール溶接部（２１）の形成により
密封状態とする工程とを有することを特徴とする放射能
汚染物の収納方法。1. A method of hermetically housing a radioactive contaminant (X) inside a container body (1), comprising the step of loading the container body with the radioactive contaminant and an upper lid of the container body. Welding (2) and sealing it except for the gas insertion port (4), removing internal air from the container body through the gas insertion port, and filling the inside of the container body with an inert gas. To seal the gas insertion opening, and a welding plug (20) is inserted outside the closed portion of the gas insertion opening to form a seal welding portion (21) between the gas insertion opening and the inner edge of the gas insertion opening. A method for storing radioactive contaminants, comprising:
る閉塞手段が、ガス挿通口に内向き状態に配された弁座
（１３）に、弾発部材（１４）の弾発力により弁体（１
５）を外方に移動させて緊密に接触させるものであるこ
とを特徴とする請求項１記載の放射能汚染物の収納方
法。2. The closing means in the step of closing the gas insertion opening (4) is provided with a valve seat (13) disposed inwardly in the gas insertion opening, by a resilient force of a resilient member (14). Body (1
5. The method for storing radioactive contaminants according to claim 1, wherein the step (5) is moved outwardly and brought into intimate contact.
時に、弁体（１５）を内方に移動させてガス挿通口
（４）を挿通状態とすることを特徴とすることを特徴と
する請求項請求項２記載の放射能汚染物の収納方法。3. The valve body (15) is moved inward so that the gas insertion port (4) is inserted when the internal air is removed and the inert gas is filled. The method for storing radioactive contaminants according to claim 2.
（１）と、該容器本体のガス挿通口（４）の内部に配さ
れ弾発部材（１４）による外方への弾発力によりガス挿
通口を閉鎖状態とする弁体（１５）と、ガス挿通口に挿
入状態に配されガス挿通口の内縁部とのシール溶接部
（２１）の形成により密封状態とする溶接プラグ（２
０）とを具備する放射能汚染物の収納容器。4. A container body (1) for accommodating radioactive contaminants (X), and an elastic member (14) disposed inside the gas insertion port (4) of the container body, and elastically ejects the material outward. A valve plug (15) that closes the gas insertion opening by force and a welding plug (15) that is placed in the gas insertion opening and is sealed by forming a seal weld (21) with the inner edge of the gas insertion opening ( Two
0) and a container for storing radioactive contaminants.
体化状態に配されることを特徴とする請求項４記載の放
射能汚染物の収納容器。5. The radioactive contaminant storage container according to claim 4, wherein the valve plug (15) and the welding plug (20) are integrated with each other.
成されるとともに、ガス挿通口の回りに上部を拡径した
吊持部（１７）が配されることを特徴とする請求項４ま
たは５記載の放射能汚染物の収納容器。6. The gas insertion port (4) is formed so as to project upward, and a suspension part (17) having an enlarged upper diameter is arranged around the gas insertion port. Storage container for radioactive contamination according to 4 or 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16434394A JP3370782B2 (en) | 1994-07-15 | 1994-07-15 | Method of storing radioactive contaminants and storage container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16434394A JP3370782B2 (en) | 1994-07-15 | 1994-07-15 | Method of storing radioactive contaminants and storage container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0829591A true JPH0829591A (en) | 1996-02-02 |
| JP3370782B2 JP3370782B2 (en) | 2003-01-27 |
Family
ID=15791372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16434394A Expired - Lifetime JP3370782B2 (en) | 1994-07-15 | 1994-07-15 | Method of storing radioactive contaminants and storage container |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3370782B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2803427A1 (en) * | 1999-12-29 | 2001-07-06 | Framatome Sa | METHOD AND INSTALLATION FOR STORING IRRADIATED PRODUCTS AND IN PARTICULAR IRRADIATED NUCLEAR FUEL ASSEMBLIES |
| KR101109686B1 (en) * | 2010-12-21 | 2012-01-31 | 한국수력원자력 주식회사 | Lid for leak test of radioactive material transport package |
| CN109637688A (en) * | 2018-12-25 | 2019-04-16 | 中国原子能科学研究院 | A kind of radioactive solid waste storage barrel of anti-tritium diffusion |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53160596U (en) * | 1977-05-23 | 1978-12-15 | ||
| JPS5866899A (en) * | 1981-09-28 | 1983-04-21 | ドイツチエ・ゲゼルシヤフト・フユ−ル・ヴイ−ダ−アウフアルバイツンク・フオン・ケルンブレンシユトツフエン・ミツト・ベシユレンクテル・ハフツング | Container for storing radioactive matter and method of tightly closing same |
| JPS5983096A (en) * | 1982-11-02 | 1984-05-14 | 木村化工機株式会社 | Radioactive material transporting cask and its leakage test |
-
1994
- 1994-07-15 JP JP16434394A patent/JP3370782B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53160596U (en) * | 1977-05-23 | 1978-12-15 | ||
| JPS5866899A (en) * | 1981-09-28 | 1983-04-21 | ドイツチエ・ゲゼルシヤフト・フユ−ル・ヴイ−ダ−アウフアルバイツンク・フオン・ケルンブレンシユトツフエン・ミツト・ベシユレンクテル・ハフツング | Container for storing radioactive matter and method of tightly closing same |
| JPS5983096A (en) * | 1982-11-02 | 1984-05-14 | 木村化工機株式会社 | Radioactive material transporting cask and its leakage test |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2803427A1 (en) * | 1999-12-29 | 2001-07-06 | Framatome Sa | METHOD AND INSTALLATION FOR STORING IRRADIATED PRODUCTS AND IN PARTICULAR IRRADIATED NUCLEAR FUEL ASSEMBLIES |
| WO2001050479A1 (en) * | 1999-12-29 | 2001-07-12 | Framatome Anp | Method and installation for storing irradiated products, especially irradiated nuclear fuel assemblies |
| KR101109686B1 (en) * | 2010-12-21 | 2012-01-31 | 한국수력원자력 주식회사 | Lid for leak test of radioactive material transport package |
| CN109637688A (en) * | 2018-12-25 | 2019-04-16 | 中国原子能科学研究院 | A kind of radioactive solid waste storage barrel of anti-tritium diffusion |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3370782B2 (en) | 2003-01-27 |
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