JP2735304B2 - Molten salt electrorefining equipment - Google Patents
Molten salt electrorefining equipmentInfo
- Publication number
- JP2735304B2 JP2735304B2 JP20967289A JP20967289A JP2735304B2 JP 2735304 B2 JP2735304 B2 JP 2735304B2 JP 20967289 A JP20967289 A JP 20967289A JP 20967289 A JP20967289 A JP 20967289A JP 2735304 B2 JP2735304 B2 JP 2735304B2
- Authority
- JP
- Japan
- Prior art keywords
- molten salt
- molten
- metal
- salt electrolyte
- fuel
- 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.)
- Expired - Fee Related
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
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Landscapes
- Manufacture And Refinement Of Metals (AREA)
- Electrolytic Production Of Metals (AREA)
Description
【発明の詳細な説明】 ［発明の目的］ （産業上の利用分野） 本発明は高速増殖炉の使用済金属燃料を再処理するた
めの溶融塩電解精製装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a molten salt electrorefining apparatus for reprocessing spent metal fuel in a fast breeder reactor.
（従来の技術） 従来、高速増殖炉発電プラントから発生する使用済金
属燃料を再処理して燃料中に含まれるウラン，プルトニ
ウムなどの有用な燃料成分を濃縮回収し、かつ不要な核
分裂生成物を分離する装置として、第４図に示すような
溶融塩電解精製装置が考えられている。(Prior art) Conventionally, spent metal fuel generated from a fast breeder reactor power plant is reprocessed to concentrate and recover useful fuel components such as uranium and plutonium contained in the fuel and to remove unnecessary fission products. As a device for separation, a molten salt electrorefining device as shown in FIG. 4 has been considered.
すなわち、この溶融塩電解精製装置はカドミウム等の
溶融金属１を陽極とし、この溶融金属１中に溶解した使
用済金属燃料をKC1−LiClなどの溶融塩電解質２中に配
置された陰極３に電解析出させて使用済金属燃料に含ま
れるウラン，プルトニウムなどの燃料成分を陰極析出物
９として回収するものである。なお、図中４は電解槽、
５は断熱材、６はヒータ、７は使用済金属燃料片、８は
使用済金属燃料片７を収容するためのかご状容器であ
る。That is, this molten salt electrorefining apparatus uses a molten metal 1 such as cadmium as an anode, and applies a spent metal fuel dissolved in the molten metal 1 to a cathode 3 disposed in a molten salt electrolyte 2 such as KC1-LiCl. The fuel components such as uranium and plutonium contained in the spent metal fuel are analyzed and recovered as the cathode deposit 9. In addition, 4 in the figure is an electrolytic cell,
5 is a heat insulating material, 6 is a heater, 7 is a spent metal fuel piece, and 8 is a basket-shaped container for accommodating the spent metal fuel piece 7.
（発明が解決しようとする課題） このように構成される溶融塩電解精製装置では陰極３
への電解析出を効率よく行なうために、溶融金属１およ
び溶融塩電解質２を撹拌装置10で撹拌し、これらの金属
相および電解質相中のウランまたはプルトニウムの濃度
分布を均一にする必要がある。このとき、溶融金属１と
溶融塩電解質２の界面をできるだけ乱さないように撹拌
を行なう必要があり、そのために従来は金属相と電解質
相をそれぞれ別々の撹拌装置で撹拌することが考えられ
ている。(Problem to be Solved by the Invention) In the molten salt electrorefining apparatus configured as described above, the cathode 3
In order to carry out the electrolytic deposition on the metal efficiently, it is necessary to stir the molten metal 1 and the molten salt electrolyte 2 with a stirrer 10 to make the concentration distribution of uranium or plutonium in these metal phase and electrolyte phase uniform. . At this time, it is necessary to perform stirring so that the interface between the molten metal 1 and the molten salt electrolyte 2 is not disturbed as much as possible. For this reason, conventionally, it has been considered that the metal phase and the electrolyte phase are respectively stirred by separate stirring devices. .
しかしながら、このような方法によると金属相と電解
質相の両方の撹拌を独立に制御できるという利点はある
ものの、２本の撹拌軸を電解槽４内に入れるので撹拌装
置の占めるスペースが大きく、装置を大型化させる要因
となっていた。However, according to such a method, although there is an advantage that the stirring of both the metal phase and the electrolyte phase can be controlled independently, the space occupied by the stirring device is large because the two stirring shafts are placed in the electrolytic cell 4. Was a factor in increasing the size.
本発明はこのような事情に鑑みてなされたもので、そ
の目的は撹拌装置の占める空間を削減でき、装置の小型
化と簡素化を図れる溶融塩電解精製装置を提供すること
にある。The present invention has been made in view of such circumstances, and an object of the present invention is to provide a molten salt electrorefining apparatus that can reduce the space occupied by a stirring device and can reduce the size and simplification of the device.
［発明の構成］ （課題を解決するための手段） 上記目的を達成するために、本発明は、使用済金属燃
料が溶融したカドミウム等の溶融金属を陽極とし、下面
がこの溶融金属の上面に接した溶融塩電解質中に陰極を
配置し、溶融金属に溶融した使用済金属燃料を陰極に電
解析出させて使用済金属燃料に含まれる燃料成分を精製
回収すると共に、撹拌装置で溶融金属と溶融塩電解質と
を撹拌する溶融塩電解精製装置において、 撹拌装置を、溶融金属と溶融塩電解質とに跨がる１本
の撹拌軸と、この撹拌軸における溶融金属と溶融塩電解
質との間の界面を挟む位置に取付けられた一対のインペ
ラと、撹拌軸における各インペラの界面側に取付けられ
た一対のバッフル板とで構成している。[Constitution of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention provides a method in which a molten metal such as cadmium in which spent metal fuel is melted is used as an anode, and a lower surface is formed on an upper surface of the molten metal. A cathode is disposed in the molten salt electrolyte in contact with the molten metal, and the spent metal fuel melted in the molten metal is electrolytically deposited on the cathode to purify and recover the fuel component contained in the spent metal fuel. In a molten salt electrorefining apparatus that stirs a molten salt electrolyte, a stirrer is connected to a single stirring shaft extending over the molten metal and the molten salt electrolyte, and between the molten metal and the molten salt electrolyte in the stirring shaft. It is composed of a pair of impellers attached at positions sandwiching the interface, and a pair of baffle plates attached to the interface side of each impeller on the stirring shaft.
（作 用） 本発明においては、撹拌装置のバッフル板を溶融金属
と溶融塩電解質の界面を挟むように配置して撹拌を行な
うことにより、溶融金属および溶融塩電解質が撹拌軸に
沿って界面と反対方向に流動するので、界面の乱れを防
止することができる。従って、溶融金属と溶融塩電解質
の界面を乱すことなく１本の撹拌軸で溶融金属および溶
融塩電解質を撹拌できるので、撹拌装置の占める空間を
削減でき、溶融塩電解精製装置の小型化と簡素化を図る
ことができる。(Operation) In the present invention, the baffle plate of the stirrer is disposed so as to sandwich the interface between the molten metal and the molten salt electrolyte and stirring is performed, whereby the molten metal and the molten salt electrolyte come into contact with the interface along the stirring axis. Since the fluid flows in the opposite direction, disturbance at the interface can be prevented. Therefore, the molten metal and the molten salt electrolyte can be agitated by one stirring shaft without disturbing the interface between the molten metal and the molten salt electrolyte, so that the space occupied by the stirring device can be reduced, and the molten salt electrolytic refining device can be reduced in size and simplified. Can be achieved.
（実施例） 以下、図面を参照して本発明の実施例を説明する。(Example) Hereinafter, an example of the present invention is described with reference to drawings.
第１図ないし第３図は本発明の一実施例を示し、第１
図は溶融塩電解精製装置の概略を示したものである。同
図において、１は溶融金属、２は溶融塩電解質、３は陰
極、４は電解槽、５は断熱材、６はヒータ、７は使用済
金属燃料片、８はかご状容器、９は陰極析出物であり、
これらは第４図に示したものと同一のものである。1 to 3 show one embodiment of the present invention.
The figure shows an outline of the molten salt electrorefining apparatus. In the figure, 1 is a molten metal, 2 is a molten salt electrolyte, 3 is a cathode, 4 is an electrolytic cell, 5 is a heat insulating material, 6 is a heater, 7 is a spent metal fuel piece, 8 is a cage, and 9 is a cathode. Is a precipitate,
These are the same as those shown in FIG.
また、10は撹拌装置であり、この撹拌装置10は第２図
および第３図に示すように１本の撹拌軸11に２つのイン
ペラ12a,12bを取付けている。これらのインペラ12a,12b
はそれぞれネジ14にて撹拌軸10に固定されており、イン
ペラ12a,12bの取付位置を調整できるようになってい
る。また、上記撹拌軸11には２枚のバッフル板13a,13b
がインペラ12aと12bとの間に設けられている。これらの
バッフル板13a,13bはインペラ12a,12bと同様にネジ14に
て撹拌軸11に固定されており、バッフル板13a,13bの取
付位置を調整できるようになっている。Reference numeral 10 denotes a stirrer. The stirrer 10 has two impellers 12a and 12b mounted on one stirrer shaft 11, as shown in FIGS. These impellers 12a, 12b
Are fixed to the stirring shaft 10 by screws 14, respectively, so that the mounting positions of the impellers 12a and 12b can be adjusted. The stirring shaft 11 has two baffle plates 13a and 13b.
Is provided between the impellers 12a and 12b. These baffle plates 13a, 13b are fixed to the stirring shaft 11 with screws 14 like the impellers 12a, 12b, so that the mounting positions of the baffle plates 13a, 13b can be adjusted.
このように構成される撹拌装置10により撹拌を行なう
場合は、第１図に示すようにバッフル板13a,13bを溶融
金属１と溶融塩電解質２の界面を挟むように配置して撹
拌を行なう。このようにバッフル板13a,13bを溶融金属
１と溶融塩電解質２の界面を挟むように配置することに
より、溶融金属１および溶融塩電解質２は撹拌軸11に沿
って界面と反対方向に流動するので、海面の乱れを防止
することができる。When stirring is performed by the stirring device 10 configured as described above, the stirring is performed by arranging the baffle plates 13a and 13b so as to sandwich the interface between the molten metal 1 and the molten salt electrolyte 2 as shown in FIG. By arranging the baffle plates 13a and 13b so as to sandwich the interface between the molten metal 1 and the molten salt electrolyte 2, the molten metal 1 and the molten salt electrolyte 2 flow along the stirring shaft 11 in the direction opposite to the interface. Therefore, disturbance of the sea surface can be prevented.
従って、本実施例では溶融金属１と溶融塩電解質２の
界面を乱すことなく１本の撹拌軸11で溶融金属１および
溶融塩電解質２を撹拌できるので、撹拌装置の占める空
間を削減でき、溶融塩電解精製装置の小型化と簡素化を
図ることができる。Therefore, in this embodiment, the molten metal 1 and the molten salt electrolyte 2 can be stirred by one stirring shaft 11 without disturbing the interface between the molten metal 1 and the molten salt electrolyte 2, so that the space occupied by the stirring device can be reduced, The miniaturization and simplification of the salt electrorefining apparatus can be achieved.
また、陰極３の側面近くにインペラ12aがあると、イ
ンペラ12aによる流動の影響を強く受け、陰極析出物９
の形成を阻害する。このため、溶融塩電解質２中のイン
ペラ12aを陰極３の少なくとも下面に位置させることに
より析出物９の形成を効率よく行なうことができる。If the impeller 12a is located near the side surface of the cathode 3, the impeller 12a is strongly affected by the flow, and the cathode deposit 9a
Inhibit the formation of Therefore, the deposit 9 can be efficiently formed by positioning the impeller 12a in the molten salt electrolyte 2 at least on the lower surface of the cathode 3.
なお、析出物９の形成を効率よくするために、溶融金
属１と溶融塩電解質２の各相に配置されるインペラ12a,
12b及びバッフル板13a,13bの寸法、形状を変えて、前記
各相での撹拌条件を異ならせてもよい。Note that, in order to efficiently form the precipitate 9, the impellers 12a,
The size and shape of 12b and baffle plates 13a and 13b may be changed to change the stirring conditions for each phase.
［発明の効果］ 以上説明したように本発明は、カドミウム等の溶融金
属を陽極とし、この溶融金属中に溶解した使用済金属燃
料を溶融塩電解質中に配置された陰極に電解析出させて
使用済金属燃料に含まれる燃料成分を精製回収する溶融
塩電解精製装置において、１本の撹拌軸に２つのインペ
ラとその間に２枚のバッフル板を有する撹拌装置を具備
したものである。しかも、撹拌装置のバッフル板を溶融
金属と溶融塩電解質の界面を挟むように配置して撹拌を
行なうことにより、界面の乱れを防止することができ、
１本の撹拌軸で溶融金属および溶融塩電解質の両相を撹
拌することができるので、撹拌装置の占める空間を削減
でき、溶融塩電解精製装置の小型化と簡素化を図ること
ができる。[Effects of the Invention] As described above, the present invention provides a method in which a molten metal such as cadmium is used as an anode, and a spent metal fuel dissolved in the molten metal is electrolytically deposited on a cathode disposed in a molten salt electrolyte. A molten salt electrorefining apparatus for refining and recovering a fuel component contained in a spent metal fuel is provided with a stirring apparatus having two impellers on a single stirring shaft and two baffle plates between them. Moreover, by disposing the baffle plate of the stirring device so as to sandwich the interface between the molten metal and the molten salt electrolyte and performing stirring, it is possible to prevent disturbance of the interface,
Since both phases of the molten metal and the molten salt electrolyte can be stirred with one stirring shaft, the space occupied by the stirring device can be reduced, and the size and simplification of the molten salt electrorefining device can be achieved.
第１図ないし第３図は本発明の一実施例を示し、第１図
は溶融塩電解精製装置の断面図、第２図は撹拌装置の詳
細図、第３図は第２図のIII−III矢視断面図、第４図は
従来の溶融塩電解精製装置の断面図である。 １……溶融陽極金属、２……溶融塩電解質、３……陰
極、４……電解槽、５……断熱材、６……ヒータ、７…
…使用済金属燃料片、８……かご状容器、９……陰極析
出物、10……撹拌装置、11……撹拌軸、12a,12b……イ
ンペラ、13a,13b……バッフル板、14……ネジ。1 to 3 show an embodiment of the present invention. FIG. 1 is a sectional view of a molten salt electrorefining apparatus, FIG. 2 is a detailed view of a stirring apparatus, and FIG. FIG. 4 is a sectional view of a conventional molten salt electrorefining apparatus. 1 ... Molten anode metal, 2 ... Molten salt electrolyte, 3 ... Cathode, 4 ... Electrolyzer, 5 ... Insulation material, 6 ... Heater, 7 ...
... Spent metal fuel pieces, 8 ... Cage-shaped container, 9 ... Cathode deposit, 10 ... Stirring device, 11 ... Stirring shaft, 12a, 12b ... Impeller, 13a, 13b ... Baffle plate, 14 ... …screw.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 掛樋 勲 東京都港区芝浦１丁目１番１号 株式会 社東芝本社事務所内 (72)発明者 菊田 和幸 神奈川県川崎市川崎区浮島町４―１ 日 本原子力事業株式会社研究所内 (72)発明者 東海林 裕一 神奈川県川崎市川崎区浮島町４―１ 日 本原子力事業株式会社研究所内 (72)発明者 隅田 幸生 神奈川県川崎市川崎区浮島町４―１ 日 本原子力事業株式会社研究所内 (56)参考文献 米国特許4814046（ＵＳ，Ａ) ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Isao Kakehi 1-1-1, Shibaura, Minato-ku, Tokyo Inside the head office of Toshiba Corporation (72) Inventor Kazuyuki Kikuta 4-1 Ukishima-cho, Kawasaki-ku, Kawasaki-ku, Kawasaki-shi, Kanagawa Inside the Japan Atomic Energy Research Institute (72) Inventor Yuichi Tokaibayashi 4-1 Ukishima-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Inside the Japan Nuclear Power Corporation Research Institute (72) Yukio Sumida 4, Ukishima-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa -1 Atomic Energy Research Institute, Japan (56) Reference US Patent 4,814,046 (US, A)
Claims (1)
溶融金属を陽極とし、下面がこの溶融金属の上面に接し
た溶融塩電解質中に陰極を配置し、前記溶融金属に溶融
した使用済金属燃料を前記陰極に電解析出させて前記使
用済金属燃料に含まれる燃料成分を精製回収すると共
に、撹拌装置で前記溶融金属と溶融塩電解質とを撹拌す
る溶融塩電解精製装置において、 前記撹拌装置は、 前記溶融金属と溶融塩電解質とに跨がる１本の撹拌軸
と、この撹拌軸における前記溶融金属と溶融塩電解質と
の間の界面を挟む位置に取付けられた一対のインペラ
と、前記撹拌軸における前記各インペラの界面側に取付
けられた一対のバッフル板とを具備した ことを特徴とする溶融塩電解精製装置。1. A molten metal, such as cadmium, in which spent metal fuel is melted, and a cathode is disposed in a molten salt electrolyte having a lower surface in contact with an upper surface of the molten metal. In a molten salt electrorefining apparatus, wherein a fuel is electrolytically deposited on the cathode to purify and recover a fuel component contained in the spent metal fuel, and the molten metal and the molten salt electrolyte are stirred by a stirrer, A stirring shaft extending over the molten metal and the molten salt electrolyte, a pair of impellers attached to a position sandwiching the interface between the molten metal and the molten salt electrolyte on the stirring shaft, An electrolytic refining apparatus for molten salt, comprising: a pair of baffle plates attached to an interface of each of the impellers on a stirring shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20967289A JP2735304B2 (en) | 1989-08-15 | 1989-08-15 | Molten salt electrorefining equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20967289A JP2735304B2 (en) | 1989-08-15 | 1989-08-15 | Molten salt electrorefining equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0373897A JPH0373897A (en) | 1991-03-28 |
| JP2735304B2 true JP2735304B2 (en) | 1998-04-02 |
Family
ID=16576697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20967289A Expired - Fee Related JP2735304B2 (en) | 1989-08-15 | 1989-08-15 | Molten salt electrorefining equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2735304B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4814046A (en) | 1988-07-12 | 1989-03-21 | The United States Of America As Represented By The United States Department Of Energy | Process to separate transuranic elements from nuclear waste |
-
1989
- 1989-08-15 JP JP20967289A patent/JP2735304B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4814046A (en) | 1988-07-12 | 1989-03-21 | The United States Of America As Represented By The United States Department Of Energy | Process to separate transuranic elements from nuclear waste |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0373897A (en) | 1991-03-28 |
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