JP2648655B2 - Method for producing electrode for producing metal beryllium pebble - Google Patents
Method for producing electrode for producing metal beryllium pebbleInfo
- Publication number
- JP2648655B2 JP2648655B2 JP5017556A JP1755693A JP2648655B2 JP 2648655 B2 JP2648655 B2 JP 2648655B2 JP 5017556 A JP5017556 A JP 5017556A JP 1755693 A JP1755693 A JP 1755693A JP 2648655 B2 JP2648655 B2 JP 2648655B2
- Authority
- JP
- Japan
- Prior art keywords
- metal beryllium
- electrode
- beryllium
- manufacturing
- pebble
- 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 - Lifetime
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
- Y02E30/10—Nuclear fusion reactors
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、核融合炉ブランケット
容器内に充填される小石状の金属ベリリウム（以下、
「金属ベリリウムペブル」という）を製造するために用
いる電極の製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pebble metal beryllium (hereinafter, referred to as a beryllium) filled in a fusion reactor blanket vessel.
(Referred to as “metal beryllium pebbles”).
【０００２】[0002]
【従来の技術】従来より、金属ベリリウムペブルを製造
する方法としては、特開平３−２２６５０８号公報に開
示されるように、金属ベリリウム製の消耗電極と対をな
す溶解電極との間にアークまたはプラズマを発生させ、
その熱で消耗電極を溶融し、この溶融した金属ベリリウ
ム溶滴を遠心力により遠心方向に飛散させ、不活性ガス
中で急冷凝固させ金属ベリリウムペブル粒子を製造する
回転電極法が本出願人により提案されている。2. Description of the Related Art Conventionally, as a method for manufacturing a metal beryllium pebble, as disclosed in Japanese Patent Application Laid-Open No. 3-226508, an arc or a consumable electrode made of metal beryllium is paired with a dissolving electrode forming a pair. Generates plasma,
The applicant proposes a rotating electrode method in which the consumable electrode is melted by the heat, the melted metal beryllium droplets are scattered in the centrifugal direction by centrifugal force, and rapidly solidified in an inert gas to produce metal beryllium pebble particles. Have been.
【０００３】この回転電極法に用いる金属ベリリウム製
消耗電極を製造する従来の方法としては、例えば図３に
示す製造工程によって製造されていた。図３において、
まずフッ化ベリリウムを溶解しこの溶湯をマグネシウム
により還元し金属ベリリウムペブルをステップ２０で得
る。ステップ２０で得た金属ベリリウムをステップ２１
で真空溶解し金属ベリリウムインゴットを得る。次い
で、ステップ２２で金属ベリリウムインゴットを破砕
し、ステップ２３で粉末にした後、この粉末をステップ
２４でホットプレスして所定形状のブロックとした後、
ステップ２５で機械加工により金属ベリリウム製消耗電
極を得る。[0003] As a conventional method of manufacturing a consumable electrode made of metal beryllium used in the rotating electrode method, for example, it is manufactured by a manufacturing process shown in FIG. In FIG.
First, beryllium fluoride is dissolved, and this molten metal is reduced with magnesium to obtain a metal beryllium pebble in step 20. The metal beryllium obtained in Step 20 is used in Step 21
To obtain a metal beryllium ingot. Next, the metal beryllium ingot is crushed in step 22 and powdered in step 23, and the powder is hot pressed in step 24 to form a block of a predetermined shape.
In step 25, a consumable electrode made of metal beryllium is obtained by machining.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、このよ
うな金属ベリリウム製消耗電極の製造方法によると、金
属ベリリウムインゴットを破砕する工程でコバルト等の
放射化物質が混入するおそれがあり、また酸化ベリリウ
ムが増大するため、ホットプレスで得られた金属ベリリ
ウム製消耗電極の純度が低下するという問題がある。金
属ベリリウム製消耗電極の純度が低下すると、この電極
を回転電極法に用いて製造される金属ベリリウムペブル
の純度も低下する。However, according to such a method of manufacturing a consumable electrode made of metal beryllium, there is a risk that an activated substance such as cobalt may be mixed in the step of crushing the metal beryllium ingot, and that beryllium oxide may be used. This increases the purity of the metal beryllium consumable electrode obtained by hot pressing. As the purity of the metal beryllium consumable electrode decreases, the purity of the metal beryllium pebbles manufactured using this electrode in the rotating electrode method also decreases.
【０００５】そのため、この金属ベリリウムペブルを核
融合炉ブランケット容器に充填した場合にはトリチウム
の生成量が低下し核融合炉燃料サイクルの効率が悪くな
るという問題が生じる。またコバルト等の含有率が高く
なることから、中性子照射による放射化が問題となる。
本発明は、このような問題点を解決し、さらに金属ベリ
リウムペブルの製造コストを下げるためになされたもの
で、純度が９９．５％以上の高純度の金属ベリリウム製
消耗電極を得る方法を提供することを目的とする。[0005] Therefore, when this metal beryllium pebble is filled in a fusion reactor blanket container, there arises a problem that the production amount of tritium decreases and the efficiency of the fusion reactor fuel cycle deteriorates. In addition, since the content of cobalt and the like becomes high, activation by neutron irradiation becomes a problem.
The present invention has been made in order to solve such problems and further reduce the manufacturing cost of metal beryllium pebbles, and provides a method for obtaining a high-purity metal beryllium consumable electrode having a purity of 99.5% or more. The purpose is to do.
【０００６】[0006]
【課題を解決するための手段】前記課題を解決するため
の本発明による金属ベリリウムペブル製造用電極の製造
方法は、金属ベリリウムペブルを回転電極法にて製造す
るために用いる電極の製造方法であって、金属ベリリウ
ムをマグネシウム還元により製造する工程、前記工程よ
り得られた金属ベリリウムを真空溶解する工程、前記工
程より得られた金属ベリリウムを真空鋳造する工程、真
空鋳造後に鋳型より鋳造体を取出す工程とからなること
を特徴とする。A method of manufacturing an electrode for manufacturing a metal beryllium pebble according to the present invention for solving the above-mentioned problems is a method of manufacturing an electrode used for manufacturing a metal beryllium pebble by a rotating electrode method. Producing a metal beryllium by magnesium reduction, vacuum melting the metal beryllium obtained from the above step, vacuum casting the metal beryllium obtained from the above step, and taking out a casting from the mold after vacuum casting And characterized by the following.
【０００７】[0007]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。まず、図１に示すステップ１に示すように、フッ
化ベリリウムを溶解し、これにマグネシウムを添加して
マグネシウム還元により溶湯中に金属ベリリウムを浮遊
させ、この得られた浮遊金属ベリリウムを取出す。次い
でステップ１からステップ２に進み、得られた金属ベリ
リウムについて第１回目の真空溶解を施す。真空溶解
は、例えば図２（Ａ）に示すように、密閉容器１１中を
真空に保持し、この真空中のるつぼ１２内にて行なう。
得られた溶融金属ベリリウム１３の純度は高純度とな
る。次いで、図１に示すステップ３に進み第２回目の真
空溶解を施し、さらに金属ベリリウムの純度を上げる。
ここで精錬の効果が十分認められた場合は１回のみの真
空溶解でよい。次いでステップ４に進み真空中で所望の
形状に真空鋳造する。図２に示す（Ｂ）において鋳型１
４内にるつぼ１２内の溶融金属ベリリウム１３を鋳込
む。鋳型１４から得られた電極形状の金属ベリリウム鋳
造品は、図２（Ｃ）に示すとおり、消耗電極１５として
取出される。Embodiments of the present invention will be described below with reference to the drawings. First, as shown in Step 1 shown in FIG. 1, beryllium fluoride is dissolved, magnesium is added thereto, and metal beryllium is suspended in the molten metal by magnesium reduction, and the obtained floating metal beryllium is taken out. Next, the process proceeds from Step 1 to Step 2, where the first vacuum melting is performed on the obtained metal beryllium. The vacuum melting is performed, for example, as shown in FIG. 2A, by keeping the inside of the sealed container 11 at a vacuum and in the crucible 12 under the vacuum.
The purity of the obtained molten metal beryllium 13 is high. Next, the process proceeds to step 3 shown in FIG. 1, and a second vacuum melting is performed to further increase the purity of the metal beryllium.
Here, if the effect of the refining is sufficiently recognized, only one vacuum melting is sufficient. Next, the process proceeds to step 4 where vacuum casting is performed in a desired shape in a vacuum. In (B) shown in FIG.
The molten metal beryllium 13 in the crucible 12 is cast into the crucible 4. The electrode-shaped metal beryllium casting obtained from the mold 14 is taken out as a consumable electrode 15 as shown in FIG.
【０００８】図１および図２に示す工程の製造方法によ
ると、真空溶解ならびに真空鋳造により直接製造される
ため、外部から不純物の混入がなくなるとともに、精錬
効果も有しており、高純度の金属ベリリウム製消耗電極
１５が得られる。従って、この高純度の金属ベリリウム
製消耗電極を回転電極法に用い、溶融した金属ベリリウ
ム液滴を遠心力により遠心方向に飛散させ、不活性ガス
中で急冷凝固させて得られる金属ベリリウムペブルは高
純度となる。この金属ベリリウムペブルを核融合炉ブラ
ンケット容器に充填することで、トリチウムの生成量を
増大させることができる。さらにはコバルト等の含有率
も低下するため、中性子照射による放射化が避けられる
という効果がある。According to the manufacturing method of the steps shown in FIGS. 1 and 2, since it is manufactured directly by vacuum melting and vacuum casting, there is no mixing of impurities from the outside, and it also has a refining effect. A beryllium consumable electrode 15 is obtained. Therefore, a metal beryllium pebble obtained by using this consumable electrode made of high-purity metal beryllium in the rotating electrode method, causing molten metal beryllium droplets to scatter in the centrifugal direction by centrifugal force, and rapidly solidifying in an inert gas is high. Purity. By filling this metal beryllium pebble into a fusion reactor blanket container, the amount of tritium generated can be increased. Further, since the content of cobalt and the like also decreases, there is an effect that activation by neutron irradiation can be avoided.
【０００９】[0009]
【発明の効果】以上説明したように、本発明の金属ベリ
リウムペブル製造用電極の製造方法によると、簡単な工
程で高純度の金属ベリリウム製消耗電極が得られるた
め、金属ベリリウムペブルの製造コストを下げることが
できるとともに、核融合炉ブランケット容器に充填して
用いた場合のトリチウム生成量が増大され、核融合炉の
燃料サイクルが向上するという効果がある。さらには中
性子照射による放射化が極めて少ないという効果もあ
る。As described above, according to the method for manufacturing an electrode for manufacturing metal beryllium pebbles of the present invention, a high-purity metal beryllium consumable electrode can be obtained in a simple process. In addition to the above, the amount of tritium generated when used in a fusion reactor blanket container can be increased, and the fuel cycle of the fusion reactor can be improved. Furthermore, there is also an effect that activation by neutron irradiation is extremely small.
【図１】本発明の実施例による金属ベリリウムペブル製
造用電極の製造方法を示す工程図である。FIG. 1 is a process diagram illustrating a method of manufacturing an electrode for manufacturing a metal beryllium pebble according to an embodiment of the present invention.
【図２】本発明の実施例による製造工程を示す模式図で
ある。FIG. 2 is a schematic view illustrating a manufacturing process according to an embodiment of the present invention.
【図３】従来の金属ベリリウムペブル製造用電極の製造
方法を示す工程図である。FIG. 3 is a process chart showing a conventional method of manufacturing an electrode for manufacturing a metal beryllium pebble.
１１ 密閉容器 １２ るつぼ １３ 鋳型 11 Closed container 12 Crucible 13 Mold
Claims (1)
製造するために用いる電極の製造方法であって、 金属ベリリウム原料をマグネシウム還元により製造する
工程、 前記工程より得られた金属ベリリウムを真空溶解する工
程、 前記工程より得られた金属ベリリウムを真空鋳造する工
程、 真空鋳造後に鋳型より鋳造体を取出す工程とからなるこ
とを特徴とする金属ベリリウムペブル製造用電極の製造
方法。1. A method for manufacturing an electrode used for manufacturing a metal beryllium pebble by a rotating electrode method, comprising: manufacturing a metal beryllium raw material by magnesium reduction; and vacuum melting the metal beryllium obtained from the step. A method for producing a metal beryllium pebble electrode, comprising: a step of vacuum casting metal beryllium obtained from the above step; and a step of removing a casting from a mold after vacuum casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5017556A JP2648655B2 (en) | 1993-02-04 | 1993-02-04 | Method for producing electrode for producing metal beryllium pebble |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5017556A JP2648655B2 (en) | 1993-02-04 | 1993-02-04 | Method for producing electrode for producing metal beryllium pebble |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06228675A JPH06228675A (en) | 1994-08-16 |
| JP2648655B2 true JP2648655B2 (en) | 1997-09-03 |
Family
ID=11947195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5017556A Expired - Lifetime JP2648655B2 (en) | 1993-02-04 | 1993-02-04 | Method for producing electrode for producing metal beryllium pebble |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2648655B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5927697B2 (en) * | 2012-03-30 | 2016-06-01 | 国立研究開発法人日本原子力研究開発機構 | Method for producing berylide pebble |
| CN102994779B (en) * | 2013-01-09 | 2017-03-01 | 九洲资源控股集团有限公司 | Tunnel-type double-circulation vacuum smelting furnace and its method |
-
1993
- 1993-02-04 JP JP5017556A patent/JP2648655B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06228675A (en) | 1994-08-16 |
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