JPH08189982A - Production of ceramic fuel particle - Google Patents
Production of ceramic fuel particleInfo
- Publication number
- JPH08189982A JPH08189982A JP7000356A JP35695A JPH08189982A JP H08189982 A JPH08189982 A JP H08189982A JP 7000356 A JP7000356 A JP 7000356A JP 35695 A JP35695 A JP 35695A JP H08189982 A JPH08189982 A JP H08189982A
- Authority
- JP
- Japan
- Prior art keywords
- solution
- ceramic
- gelling
- gelled
- internal
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ウラン、トリウム、超
ウラン元素から選択されたセラミックス構成金属からな
る原子炉用セラミックス燃料粒子等の微小球状セラミッ
クス粒子を調製する方法の一つである内部ゲル化法にお
いて使用される内部ゲル化原液の調製・供給方法に関す
るものである。The present invention relates to an internal gel which is one of the methods for preparing fine spherical ceramic particles such as ceramics fuel particles for nuclear reactors which are composed of ceramic constituent metals selected from uranium, thorium and transuranium elements. The present invention relates to a method for preparing and supplying an internal gelling stock solution used in a chemical method.
【０００２】[0002]
【従来の技術】従来、原子炉用セラミックス燃料粒子の
分野において利用されている燃料ゲル粒子の製造方法の
一つである内部ゲル化法においては、ウラン等の燃料金
属を含む被ゲル化液とゲル化液とを予め冷却・混合した
内部ゲル化原液の液滴を何等かの方法で造り、それを加
熱して液滴内部のヘキサメチレンテトラミン（ＨＭＴ
Ａ）の熱分解で発生するアンモニアを被ゲル化物に作用
させてゲル粒子を得ている。2. Description of the Related Art In the internal gelation method, which is one of the methods for producing fuel gel particles conventionally used in the field of ceramics fuel particles for nuclear reactors, a gelling liquid containing a fuel metal such as uranium is used. A droplet of the internal gelling stock solution prepared by previously cooling and mixing with the gelling solution is prepared by some method, and heated to heat hexamethylenetetramine (HMT) inside the droplet.
Ammonia generated by the thermal decomposition of A) is caused to act on the substance to be gelled to obtain gel particles.
【０００３】[0003]
【発明が解決しようとする課題】従来技術では、被ゲル
化液とゲル化液とを予め冷却・混合した内部ゲル化原液
をノズル部に供給して液滴を形成をするので、原液タン
ク、供給ポンプ、ノズル部等の原液供給ライン全体を冷
却することが不可欠であった。しかし、この冷却は、ゲ
ル化装置全体の構造を複雑にするのみならず、大気中の
湿気がノズル部で凝縮し、そこでできた水滴がノズル先
端で内部ゲル化原液と合流して液滴が不均質になるとい
う不利に加えて、滴下方向が鉛直方向からずれる場合が
あるという問題点があった。このずれは、ゲル化のため
の加熱方法に高速誘電加熱法［特願平６−７５７８９
号］を適用する場合においては特にトラブルの原因とな
る。In the prior art, since the internal gelling stock solution in which the liquid to be gelled and the gelling solution are cooled and mixed in advance is supplied to the nozzle portion to form droplets, the stock solution tank, It was essential to cool the entire stock solution supply line such as the supply pump and nozzle. However, this cooling not only complicates the entire structure of the gelling apparatus, but moisture in the atmosphere condenses at the nozzle portion, and water droplets formed there merge with the internal gelled stock solution at the nozzle tip to form droplets. In addition to the disadvantage of becoming inhomogeneous, there is a problem that the dropping direction may deviate from the vertical direction. This deviation is caused by a high-speed dielectric heating method as a heating method for gelation [Japanese Patent Application No. 6-75789].
No.] will cause trouble especially.
【０００４】そこで、本発明の目的は、被ゲル化液とゲ
ル化液のいずれをも冷却することなく、ゲル化原液の液
滴形成・滴下が可能になる方法を提供することにある。Therefore, an object of the present invention is to provide a method capable of forming and dropping liquid droplets of a gelled stock solution without cooling both the liquid to be gelled and the gelled liquid.
【０００５】[0005]
【課題を解決するための手段】本願発明者が鋭意研究の
結果、目的とする課題の解決のために採用した手段は次
のとおりである。Means for Solving the Problems As a result of earnest research by the inventor of the present application, the means adopted for solving the intended problems are as follows.
【０００６】第１は、被ゲル化液とゲル化液の混合部か
らノズル先端までの内部ゲル化原液供給ラインの容積を
可能な限り小さくすることによって、混合後液滴滴下ま
での所要時間を可能な限り短縮し、その滴下前に内部ゲ
ル化が始まらないようにしたことである。First, the volume of the internal gelled stock solution supply line from the mixing part of the liquid to be gelled and the gelled liquid to the tip of the nozzle is made as small as possible, so that the time required for dropping liquid drops after mixing is reduced. It is as short as possible so that internal gelation does not start before the dropping.
【０００７】第２は、上記の小容積の部分を被ゲル化液
とゲル化液を混合した粘性の高い内部ゲル化原液が通過
する極く短時間の間に、実用上問題のない程度にまで両
液を均一に混合するために、上記の小容積の一部として
極く細長い管を配置したことである。Second, within a very short period of time during which a highly viscous internal gelling stock solution, which is a mixture of the gelling solution and the gelling solution, passes through the above-mentioned small volume portion, to the extent that there is no practical problem. In order to uniformly mix both liquids up to this point, an extremely elongated tube is arranged as a part of the above small volume.
【０００８】[0008]
【実施例】実施例について本発明を具体的に説明する。
ただし、本発明は実施例によって限定されるものではな
い。EXAMPLES The present invention will be specifically described with reference to examples.
However, the present invention is not limited to the examples.
【０００９】[0009]
【実施例１】被ゲル化液とゲル化液の混合部は、内径
０.５ｍｍのテフロン製Ｔ型ジョイントの相対する方向
から両液を正面衝突させ双方に垂直のもう一つの方向に
設けたノズル部に供給する構造とした。ノズル部は、そ
の先端は外径０.７ｍｍ内径０.４ｍｍのステンレス管と
し、途中に内径０.１ｍｍ長さ５０ｍｍのテフロン管を
配置し、混合部からノズル先端までの全容積を０.００
４１ｍｌとした。[Example 1] The mixing portion of the liquid to be gelled and the gelling liquid was provided in the other direction in which both liquids collide head-on from opposite directions of a Teflon T-joint having an inner diameter of 0.5 mm and are perpendicular to both. The structure is such that it is supplied to the nozzle portion. The tip of the nozzle is a stainless steel tube with an outer diameter of 0.7 mm and an inner diameter of 0.4 mm, and a Teflon tube with an inner diameter of 0.1 mm and a length of 50 mm is placed in the middle, and the total volume from the mixing section to the nozzle tip is 0.00.
It was 41 ml.
【００１０】被ゲル化液として酸不足型硝酸ウラニル溶
液（Ｕ濃度＝２.５ｍｏｌ／ｌ、ＮＯ3 -／Ｕモル比＝１.
５５）を１.２ｍｌ／分、ゲル化液としてＨＭＴＡ−尿
素混合溶液（濃度各３ｍｏｌ／ｌ）を１.８ｍｌ／分の
速度で前記の混合部で合流させ、ノズル部に供給した結
果、ノズル先端までにゲル化が開始せずトラブルなく滴
下できた。これを前記の高速誘電加熱法で加熱・ゲル化
し、希アンモニア水（０.５ｍｏｌ／ｌ）中に問題なく
健全なゲル微小球として回収できた。An acid-deficient uranyl nitrate solution as the liquid to be gelled (U concentration = 2.5 mol / l, NO 3 − / U molar ratio = 1.
55 ml) and 1.2 ml / min of HMTA-urea mixed solution (concentration 3 mol / l each) as a gelling liquid were merged at the mixing part at a rate of 1.8 ml / min, and the result was supplied to the nozzle part. Gelation did not start up to the tip, and it was possible to drop without trouble. This was heated and gelled by the high-speed dielectric heating method described above, and could be recovered as healthy gel microspheres in dilute aqueous ammonia (0.5 mol / l) without any problem.
【００１１】[0011]
【実施例２】実施例１と同一の混合部ノズル部を用い
て、被ゲル化液として酸不足型硝酸ウラニル溶液（Ｕ濃
度＝１.３６ｍｏｌ／ｌ、ＮＯ3 -／Ｕモル比＝１.５５）
を１.５ｍｌ／分、ゲル化液としてＨＭＴＡ−尿素混合
溶液（濃度各３ｍｏｌ／ｌ）を１.５ｍｌ／分の速度で
前記の混合部で合流させ、ノズル部に供給した結果、ゲ
ル化する前にノズル先端よりトラブルなく滴下できた。
これを実施例１と同様にして加熱・ゲル化し、問題なく
健全なゲル微小球として回収できた。Example 2 Using the same mixing section nozzle section as in Example 1, an acid-deficient uranyl nitrate solution (U concentration = 1.36 mol / l, NO 3 − / U molar ratio = 1. 55)
Of 1.5 ml / min, and an HMTA-urea mixed solution (concentration: 3 mol / l) as a gelling solution were merged at the mixing part at a rate of 1.5 ml / min and supplied to the nozzle part, resulting in gelation. I was able to drip from the tip of the nozzle without any trouble.
This was heated and gelated in the same manner as in Example 1 and could be recovered as sound gel microspheres without any problem.
【００１２】[0012]
【発明の効果】第１に、従来の内部ゲル化法の技術で
は、ゲル化原液を室温より低い零度近くに冷却する冷却
装置とゲル化のための加熱装置という相反する機能を有
する二つの主要装置が必要であった。しかし、本発明の
結果、冷却装置が不要となり、全体の装置のスリム化を
可能とした。First, in the technique of the conventional internal gelation method, there are two main functions having contradictory functions, that is, a cooling device for cooling the undiluted gelling solution to near zero below room temperature and a heating device for gelation. Equipment was needed. However, as a result of the present invention, the cooling device is not required, and the entire device can be made slim.
【００１３】第２に、冷却の結果生ずるノズル部での湿
気の凝縮に基づくトラブルからの解放を可能とした。Secondly, it is possible to eliminate the trouble caused by the condensation of moisture in the nozzle portion resulting from the cooling.
【００１４】第３に、ゲル化に必要な温度までの温度上
昇程度の軽減を可能とした。加熱に前記の高速誘電加熱
法を採用する場合には、マイクロ波電力を約３／４に軽
減でき、それに伴う加熱用共振器内の電界強度の低減を
可能とし、放電発生限界に対する余裕度の増大を可能と
した。また、加熱に通常の高温の油カラムを用いる場合
には、カラムの長さを短縮でき、その面での装置のスリ
ム化をも可能とした。Third, it is possible to reduce the temperature rise up to the temperature required for gelation. When the above-mentioned high-speed dielectric heating method is used for heating, the microwave power can be reduced to about 3/4, the electric field strength in the heating resonator can be reduced accordingly, and the margin for the discharge generation limit can be reduced. Made possible. In addition, when using a normal high temperature oil column for heating, the length of the column can be shortened, and the device can be slimmed in that respect.
【図１】被ゲル化液とゲル化液の混合部及びノズル部を
備えたセラミックス燃料粒子の製造装置を示した図であ
る。FIG. 1 is a view showing an apparatus for producing ceramics fuel particles, which is provided with a mixing part of a liquid to be gelled and a gelling liquid and a nozzle part.
１：被ゲル化液とゲル化液の混合部、２：ノズル部、
３：内部ゲル化原液供給ライン1: a mixing part of a liquid to be gelled and a gelling liquid, 2: a nozzle part,
3: Internal gelled stock solution supply line
Claims (2)
するための内部ゲル化法において、被ゲル化物であるセ
ラミックス構成金属含有溶液（以下、被ゲル化液とす
る）とゲル化剤であるヘキサメチレンテトラミンを含む
溶液（以下、ゲル化液と略記する）とを冷却することな
く別々の容器に蓄え、そこから別々のポンプで室温の混
合部に供給・混合した後、冷却していないノズル部で極
短時間に液滴を形成することを特徴とする内部ゲル化原
液の調製・供給方法。1. In an internal gelation method for producing ceramic particles via gel particles, a ceramic-containing metal-containing solution (hereinafter referred to as a gelled liquid) which is a gelled substance and hexamethylene which is a gelling agent. A solution containing tetramine (hereinafter abbreviated as gelling solution) is stored in different containers without cooling, and from there, supplied and mixed by a separate pump to the mixing section at room temperature, and then in the uncooled nozzle section. A method for preparing and supplying an undiluted solution for internal gelation, which comprises forming droplets in an extremely short time.
ウム、超ウラン元素の群から成る選ばれた１種またはそ
れ以上の核燃料物質である請求項１記載の内部ゲル化原
液の調製・供給方法。2. The method for preparing and supplying an internal gelling stock solution according to claim 1, wherein the ceramic constituent metal is one or more nuclear fuel substances selected from the group consisting of uranium, thorium and transuranium elements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7000356A JP3015696B2 (en) | 1995-01-05 | 1995-01-05 | Method for producing ceramic fuel particles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7000356A JP3015696B2 (en) | 1995-01-05 | 1995-01-05 | Method for producing ceramic fuel particles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08189982A true JPH08189982A (en) | 1996-07-23 |
| JP3015696B2 JP3015696B2 (en) | 2000-03-06 |
Family
ID=11471546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7000356A Expired - Fee Related JP3015696B2 (en) | 1995-01-05 | 1995-01-05 | Method for producing ceramic fuel particles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3015696B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016160124A (en) * | 2015-02-27 | 2016-09-05 | 富士フイルム株式会社 | Method for production of cupric oxide particulate, and cupric oxide particulate |
-
1995
- 1995-01-05 JP JP7000356A patent/JP3015696B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016160124A (en) * | 2015-02-27 | 2016-09-05 | 富士フイルム株式会社 | Method for production of cupric oxide particulate, and cupric oxide particulate |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3015696B2 (en) | 2000-03-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |