JPH0375590A - Molding of metal fuel slag - Google Patents
Molding of metal fuel slagInfo
- Publication number
- JPH0375590A JPH0375590A JP1210765A JP21076589A JPH0375590A JP H0375590 A JPH0375590 A JP H0375590A JP 1210765 A JP1210765 A JP 1210765A JP 21076589 A JP21076589 A JP 21076589A JP H0375590 A JPH0375590 A JP H0375590A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- molten metal
- fuel
- slag
- oxidizing atmosphere
- 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.)
- Pending
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 40
- 239000002184 metal Substances 0.000 title claims abstract description 40
- 239000000446 fuel Substances 0.000 title claims abstract description 38
- 239000002893 slag Substances 0.000 title claims abstract description 19
- 238000000465 moulding Methods 0.000 title claims description 12
- 238000000034 method Methods 0.000 claims abstract description 17
- 230000001590 oxidative effect Effects 0.000 claims abstract description 9
- 229910045601 alloy Inorganic materials 0.000 abstract description 10
- 239000000956 alloy Substances 0.000 abstract description 10
- 238000005266 casting Methods 0.000 abstract description 8
- 239000007789 gas Substances 0.000 abstract description 6
- 239000002699 waste material Substances 0.000 abstract description 6
- 230000008018 melting Effects 0.000 abstract description 4
- 238000002844 melting Methods 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 4
- 239000012530 fluid Substances 0.000 abstract description 3
- 239000000428 dust Substances 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000470 constituent Substances 0.000 abstract 1
- 238000007711 solidification Methods 0.000 abstract 1
- 230000008023 solidification Effects 0.000 abstract 1
- 239000004071 soot Substances 0.000 abstract 1
- 239000002912 waste gas Substances 0.000 abstract 1
- 239000002914 transuranic radioactive waste Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229910052778 Plutonium Inorganic materials 0.000 description 2
- 229910052770 Uranium Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- OYEHPCDNVJXUIW-UHFFFAOYSA-N plutonium atom Chemical compound [Pu] OYEHPCDNVJXUIW-UHFFFAOYSA-N 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000010763 heavy fuel oil Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005058 metal casting Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- 239000002901 radioactive waste Substances 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
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
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、例えば高速増殖炉等に用いて好適な金属ウラ
ンや金属プルトニウムあるいはその合金等を棒状に成形
する金属燃料スラグの成形法に関する。更に詳述すると
、本発明は、金属燃料スラグの成型工程で用いる鋳型の
材料に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for forming metal fuel slag, which is suitable for use in, for example, fast breeder reactors, by forming metal uranium, metal plutonium, or alloys thereof into a rod shape. More specifically, the present invention relates to a mold material used in a metal fuel slag molding process.
（従来の・技術）
従来、金属燃料スラグの成型は、るつぼに装入した原料
を真空中で溶解し、一端を封じた石英管製の鋳型の開口
部を上方より溶湯中に浸漬した後、加圧気体をるつぼ内
に導入して溶湯表面を力ａ圧することにより真空の鋳型
内を溶湯で満たし、その後冷却、凝固させることによっ
て燃料スラグを得るようにしている。(Conventional technology) Conventionally, metal fuel slag is formed by melting raw materials charged in a crucible in a vacuum, then immersing the opening of a quartz tube mold with one end sealed into the molten metal from above. Pressurized gas is introduced into the crucible to apply pressure a to the surface of the molten metal, thereby filling the vacuum mold with the molten metal, which is then cooled and solidified to obtain fuel slag.
（発明が解決しようとする課題）
しかしながら、石英管から成る鋳型は鋳造およびその後
の離型工程中に破損し易い、また使用済鋳型はその内面
に燃料金属（ウラン、プルトニウム）が付着しているた
め、ＴＲＵ廃棄物として取り扱わなければならず、−回
の鋳造毎にかなりの量のＴＲＵ廃棄物が発生する。この
放射性廃棄物量の低減は、金属燃料再処理プロセスにお
いて最も重要な課題の一つである。(Problem to be solved by the invention) However, molds made of quartz tubes are easily damaged during casting and the subsequent mold release process, and used molds have fuel metals (uranium, plutonium) attached to their inner surfaces. Therefore, it must be treated as TRU waste, and a significant amount of TRU waste is generated for every casting. Reducing the amount of radioactive waste is one of the most important issues in the metal fuel reprocessing process.
本発明は、ＴＲＵ廃棄物を低減させる金属燃料スラグの
射出成型法を提供することを目的とする。The present invention aims to provide a method for injection molding metal fuel slag that reduces TRU waste.
（課題を解決するための手段）
かかる目的を達成するため、本発明の金属燃料スラグの
成型法は、紙製の鋳型を用い非酸化性雰囲気中において
鋳型内に溶融金属を注入するようにしている。(Means for Solving the Problems) In order to achieve the above object, the metal fuel slag molding method of the present invention uses a paper mold and injects molten metal into the mold in a non-oxidizing atmosphere. There is.
（作用）
したがって、鋳造・離型後、紙製鋳型は、焼却によって
気体化され燃料合金と分離される。そして、焼却できな
い残留燃料合金や灰分だけをＴＲＵ廃棄物として産出す
る。紙Ｖ鋳型は、成型中に溶融金属に触れても非酸化性
雰囲気中であるため燃焼することはなく、また軟化も変
形もすることなく、所定形状の燃料スラグを成型できる
。(Function) Therefore, after casting and mold release, the paper mold is gasified by incineration and separated from the fuel alloy. Only the residual fuel alloy and ash that cannot be incinerated are produced as TRU waste. Even if the paper V mold comes into contact with molten metal during molding, it will not burn because it is in a non-oxidizing atmosphere, and it can mold fuel slag into a predetermined shape without softening or deforming.
（実施例）
以下、本発明の構成を図面に示す実施例に基づいて詳細
に説明する。(Example) Hereinafter, the configuration of the present invention will be described in detail based on an example shown in the drawings.
第１図に本発明の金属燃料スラグの成型並びにその後の
鋳型廃棄物処理の工程原理図を示す。FIG. 1 shows a process principle diagram of the molding of metal fuel slag and the subsequent treatment of mold waste according to the present invention.
金属燃料スラグの鋳造は、例えばるつぼ３に装入した原
料・燃料合金２を真空雰囲気４中で溶解し、そこに一端
が閉じられた紙製鋳型１の開口部側を浸漬した後に加圧
流体を導入し、溶湯表面を加圧して真空の紙製鋳型１内
に注入する。ここで、加圧流体としては不活性ガスある
いは還元性ガスか挙げられ、例えばアルゴン（Ａｒ）ガ
スの使用が現実的である。尚、鋳造方法としては上述の
方法に限定されず、例えば紙製鋳型１に非酸化性雰囲気
中で燃料合金の溶湯を重力流下によって注ぎ込むように
しても良い。Casting of metal fuel slag is carried out, for example, by melting the raw material/fuel alloy 2 charged in a crucible 3 in a vacuum atmosphere 4, immersing the opening side of a paper mold 1 with one end closed therein, and then applying pressurized fluid. is introduced, pressurizes the surface of the molten metal, and injects it into the vacuum paper mold 1. Here, the pressurized fluid may be an inert gas or a reducing gas, and for example, it is practical to use argon (Ar) gas. The casting method is not limited to the above-mentioned method; for example, the molten fuel alloy may be poured into the paper mold 1 in a non-oxidizing atmosphere by gravity flow.
紙製鋳型１は、成型中に溶融金属と接触してもち非酸化
性雰囲気４例えば真空や不活性雰囲気あるいは還元性雰
囲気中であれば燃焼することはなく、また軟化、変形す
ることもない、したがって鋳造時の内圧と外圧の差（即
ち加圧気体で満された管外と真空の管内との圧力差）に
耐え、かつ鋳型ｌ内の真空のリークを最小限に抑えるた
めに十分な強度と肉厚を持ち使用後に燃焼・気体化でき
るようなものであれば、どのような材質を用いてもよい
、また、紙製鋳型１の内面には金属燃料スラグの離型を
容易にするため、金属燃料に無害な離型剤が塗布されて
いる。If the paper mold 1 comes into contact with molten metal during molding and is placed in a non-oxidizing atmosphere 4, such as a vacuum, an inert atmosphere, or a reducing atmosphere, it will not burn, nor will it soften or deform. Therefore, it is strong enough to withstand the difference between internal and external pressure during casting (i.e., the pressure difference between the outside of the tube filled with pressurized gas and the inside of the tube filled with vacuum) and to minimize vacuum leakage inside the mold. Any material may be used as long as it has a wall thickness that allows it to be burned and gasified after use.In addition, the inner surface of the paper mold 1 is provided with a metal fuel slag to facilitate release of the metal fuel slag. , the metal fuel is coated with a harmless mold release agent.
離型後、燃料スラグ２１は燃料要素、集合体組立工程に
送られる。一方、紙製鋳型１は焼却され気体化されて廃
棄される。このとき発生する燃焼ガスの主成分は二酸化
炭素および水であり、集塵装置を通過した後、大気中に
放出される。また、焼却によって紙製鋳型１から分離さ
れた残留合金はＴＲＵ廃棄物として銅などの合金マトリ
ックス固化処理などにより処理されるか、あるいは成型
の溶解原料として再使用される。また、紙製鋳型１の灰
分はＴＲＵ廃棄物として廃棄される。After demolding, the fuel slug 21 is sent to the fuel element and assembly assembly process. On the other hand, the paper mold 1 is incinerated, gasified, and discarded. The main components of the combustion gas generated at this time are carbon dioxide and water, and after passing through a dust collector, it is released into the atmosphere. Further, the residual alloy separated from the paper mold 1 by incineration is treated as TRU waste by solidifying an alloy matrix of copper or the like, or is reused as a melted raw material for molding. Moreover, the ash content of the paper mold 1 is discarded as TRU waste.
尚、上述の実施例は本考案の好適な実施の一例ではある
がこれに限定されるものではなく本考案の要旨を逸脱し
ない範囲において種々変形実施可能である０例えば、本
発明はウラン・プルトニウム合金燃料に限定されるもの
ではなく、融点の高い酸化物燃料や炭化物燃料を除く金
属燃料全般に用いて好適である。Although the above-mentioned embodiment is a preferred embodiment of the present invention, it is not limited thereto, and various modifications can be made without departing from the gist of the present invention. For example, the present invention The present invention is not limited to alloy fuels, but is suitable for use with all metal fuels except oxide fuels and carbide fuels with high melting points.
（発明の効果〉
以上の説明より明らかなように、本発明の金属燃料スラ
グの成型方法は、紙製鋳型を用い非酸化性雰囲気中で紙
製鋳型への溶融金属燃料の注入を行なうようにしたので
、使用後に鋳型を焼却し気体化することにより、残留金
属燃料を容易に分離することができる。また、鋳型の焼
却によって、金属燃料と灰分だけが残留するので、ＴＲ
Ｕ廃棄物量を著しく減少させることができる。また、鋳
型燃焼後に残った残留金属は再び成型の溶解材料として
再利用可能である。(Effects of the Invention) As is clear from the above description, the method for molding metal fuel slag of the present invention uses a paper mold and injects molten metal fuel into the paper mold in a non-oxidizing atmosphere. Therefore, by incinerating the mold and gasifying it after use, the residual metal fuel can be easily separated.Also, by incinerating the mold, only the metal fuel and ash remain, so TR
The amount of U waste can be significantly reduced. Furthermore, the residual metal remaining after mold combustion can be reused as melted material for molding.
第１図は本発明の金属燃料スラグの成型法並びにその後
の鋳型廃棄物処理を示す工程原理図である。
１・・・紙製鋳型、
２・・・金属燃料の溶湯、
２′・・・金属燃料スラグ、
３・・・るつぼ、
４・・・非酸化性雰囲気。FIG. 1 is a process principle diagram showing the metal fuel slag molding method of the present invention and the subsequent treatment of mold waste. 1... Paper mold, 2... Molten metal fuel, 2'... Metal fuel slag, 3... Crucible, 4... Non-oxidizing atmosphere.
Claims (1)
非酸化性雰囲気中で前記鋳型へ溶融金属燃料を注入する
ことを特徴とする金属燃料スラグの成型法。In the metal fuel slag molding process, paper molds are used,
A method for molding metal fuel slag, comprising injecting molten metal fuel into the mold in a non-oxidizing atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1210765A JPH0375590A (en) | 1989-08-17 | 1989-08-17 | Molding of metal fuel slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1210765A JPH0375590A (en) | 1989-08-17 | 1989-08-17 | Molding of metal fuel slag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0375590A true JPH0375590A (en) | 1991-03-29 |
Family
ID=16594763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1210765A Pending JPH0375590A (en) | 1989-08-17 | 1989-08-17 | Molding of metal fuel slag |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0375590A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006112838A (en) * | 2004-10-13 | 2006-04-27 | Nuclear Fuel Ind Ltd | Method for manufacturing fuel compact for high-temperature gas-cooled reactor |
| JP2014139559A (en) * | 2012-09-13 | 2014-07-31 | Ge-Hitachi Nuclear Energy Americas Llc | Methods of fabricating metallic fuel from surplus plutonium |
-
1989
- 1989-08-17 JP JP1210765A patent/JPH0375590A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006112838A (en) * | 2004-10-13 | 2006-04-27 | Nuclear Fuel Ind Ltd | Method for manufacturing fuel compact for high-temperature gas-cooled reactor |
| JP2014139559A (en) * | 2012-09-13 | 2014-07-31 | Ge-Hitachi Nuclear Energy Americas Llc | Methods of fabricating metallic fuel from surplus plutonium |
| US10280527B2 (en) | 2012-09-13 | 2019-05-07 | Ge-Hitachi Nuclear Energy Americas Llc | Methods of fabricating metallic fuel from surplus plutonium |
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