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首页> 外文会议>Annual meeting of the Institute of Nuclear Materials Management >The Status of the Japanese Project on Material Accountancy of Fuel Debris and U.S.Japan Cooperation on Survey of Technologies for Nuclear Material Accountancy at Fukushima Daiichi Nuclear Power Plant
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The Status of the Japanese Project on Material Accountancy of Fuel Debris and U.S.Japan Cooperation on Survey of Technologies for Nuclear Material Accountancy at Fukushima Daiichi Nuclear Power Plant

机译：日本燃料碎片物资核算项目的现状和美国在福岛第一核电站核材料核算技术调查方面的日本合作

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The Great East Japan Earthquake and Tsunami in 2011 led to the accident at the Fukushima Daiichi Nuclear Power Plant (IF) and subsequent meltdown of the reactor cores of Units 1,2, and 3. The Japanese project on material accountancy technology development for fuel debris of Units 1-3 of IF has been implemented under the roadmap, "Mid-and-long-Term Roadmap towards the Decommissioning of Fukushima Daiichi Nuclear Power Units 1-4" with recovery of the fuel debris starting in 2020. At the time of accident, about 270 tons of fuel were in Units 1-3 reactor cores. Up to that time, material accountancy was implemented as an item facility for adequate material control and for the International Atomic Energy Agency's safeguards verification. Fuel debris contains nuclear fuel materials, fission products and reactor core structural materials, etc. Fuel debris will need to be controlled adequately after removal from the reactors, but material accountancy measures as an item facility no longer can be applied because of meltdown of the fuel. Development of measurement technologies for fuel debris may be required for adequate material control and accountancy of special nuclear material in the fuel debris at Fukushima Daiichi. Japan Atomic Energy Agency (JAEA) and United States Department of Energy / National Nuclear Security Administration (DOE/NNSA) have agreed to collaborate to investigate past experience on material control at severe accidents involving reactor core fuels and potential measurement technologies for fuel debris measurement. Besides DOE/NNSA and JAEA, Japanese Government, Tokyo Electric Power Company (TEPCO), Central Research Institute of Electric Power Industry (CRIEPI) and the U.S. National Laboratories have been collaborating in this effort. This paper describes the purpose, objectives, structure and process of this collaboration.
机译：2011年的东日本大地震和海啸导致福岛第一核电站（IF）发生事故，随后导致1,2和3号机组的反应堆堆芯熔化。 IF的1-3号机组已经按照路线图“福岛第一核电1-4号机组退役的中长期路线图”实施，并于2020年开始回收燃料碎片。事故中，1-3号反应堆堆芯中约有270吨燃料。到那时为止，物质会计被作为一项项目设施实施，以进行适当的物质控制和国际原子能机构的保障核查。燃料碎片包含核燃料材料，裂变产物和反应堆核心结构材料等。从反应堆中移出后，燃料碎片将需要得到充分控制，但由于燃料的熔化，不再可以使用物料核算措施作为一项设施。福岛第一核电站可能需要开发燃料碎片测量技术，以对材料进行适当的材料控制和核算特种燃料中的特殊核材料。日本原子能机构（JAEA）和美国能源部/国家核安全局（DOE / NNSA）已同意合作调查过去在涉及反应堆堆芯燃料的严重事故中进行材料控制的经验，以及用于燃料碎片测量的潜在测量技术。除DOE / NNSA和JAEA外，日本政府，东京电力公司（TEPCO），中央电力工业研究所（CRIEPI）和美国国家实验室也在开展这项工作。本文描述了这种合作的目的，目标，结构和过程。

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