Development of low-activation vanadium alloy for recycling within 10 years after use in fusion reactors
Project/Area Number |
15K14284
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Research Category |
Grant-in-Aid for Challenging Exploratory Research
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Allocation Type | Multi-year Fund |
Research Field |
Nuclear fusion studies
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Research Institution | National Institute for Fusion Science |
Principal Investigator |
Nagasaka Takuya 核融合科学研究所, ヘリカル研究部, 准教授 (40311203)
|
Co-Investigator(Kenkyū-buntansha) |
田中 照也 核融合科学研究所, ヘリカル研究部, 准教授 (30353444)
|
Project Period (FY) |
2015-04-01 – 2018-03-31
|
Project Status |
Completed (Fiscal Year 2017)
|
Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
|
Keywords | 廃炉・リサイクル技術 / 接触線量率 / 高純度化 / 高温強度 / 金属精製 |
Outline of Final Research Achievements |
The present study examined (1) reduction in the amount of harmful radioactive impurities generating long half-life nuclides, (2) minimization of the concentration of the alloying element Ti, which is also one of the harmful radioactive elements, and (3) removal of noble gaseous and volatile gaseous radioactive impurities. For the topic (1), harmful radioactive impurities, Co and Mo, were successfully reduced by 50 % and 90 %, respectively, compared with the current alloys. For (2), it was revealed that the alloys maintained ductility even if Ti concentration was reduced in to 1 mass% from the current amount, 4 mass%. For (3), it was demonstrated that the concentration of the impurities, Co, Ni, Cu, Al and Mn, could be reduced by refining with electron beam melting. Ar concentration was below the detection limit, 10 mass ppm, irrespective of the refining, indicating Ar must be effectively removed by melting.
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Report
(4 results)
Research Products
(6 results)
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[Presentation] 核融合炉で使用後10年以内に再利用可能な低放射化バナジウム合金の開発2018
Author(s)
長坂琢也, 田中照也, 後藤拓也, 室賀健夫, 相良明男, 野村和宏, 櫻井星児, 吉 永英雄, 菅原孝昌, 湯葢邦夫, 松川義孝, 笠田竜太, 藪内聖皓, 木村晃彦
Organizer
日本原子力学会2018年春の年会
Related Report
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