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軽水炉実機水環境模擬照射装置の整備と試験運転

Establishment and test operation of irradiation facility for LWR water environment simulation tests

佐谷戸 夏紀 ; 大塚 薫 ; 冬島 拓実 ; 遠藤 泰一; 大塚 紀彰 ; 北岸 茂  ; 飛田 正浩*; 磯崎 太*; 松本 聡*; 竹本 紀之 

Sayato, Natsuki; Otsuka, Kaoru; Fuyushima, Takumi; Endo, Yasuichi; Otsuka, Noriaki; Kitagishi, Shigeru; Tobita, Masahiro*; Isozaki, Futoshi*; Matsumoto, Satoshi*; Takemoto, Noriyuki

文部科学省が行う最先端研究基盤事業の補助対象事業として、材料試験炉JMTR(Japan Materials Testing Reactor, 50MW)では「世界最先端研究用原子炉の高度利用による国際的研究開発拠点の整備」が採択された。本事業の一環として、JMTRでは平成22年度から「軽水炉実機水環境模擬照射装置」を整備した。本装置は、温度、圧力、水質(溶存酸素、溶存水素等)を制御し、軽水炉(BWR及びPWR)条件の水環境を模擬しながら、炉内構造材等の中性子照射が行える照射装置である。さらにPWR条件用の照射装置には、ホウ素やリチウムを添加するための薬液注入機能を追加した。本装置の整備後は試験運転を実施し、本装置の性能を確認した。本報告書は、軽水炉実機水環境模擬照射装置の整備及び整備後に実施した本装置の試験運転についてまとめたものである。

Japan Materials Testing Reactor (JMTR, 50MW) was selected as a project to be subsidized by the Ministry of Education, Culture, Sports, Science and Technology (MEXT) for the "Establishment of an International Research and Development Center through Advanced Utilization of the World's Most Advanced Research Reactor". As part of this project, JMTR has installed "LWR Water Environment Simulation Tests" since 2010. This facility can control temperature, pressure, and water quality (dissolved oxygen, dissolved hydrogen, etc.) to simulate the water environment of light water reactors (BWR and PWR) and perform neutron irradiation of in-core structural materials, etc. In addition, this facility is also designed for PWR conditions. Chemical injection system for adding boron and lithium was added to the facility for PWR conditions. After the equipment was installed, test operation was carried out to confirm the performance of the facility. This report summarizes the establishment and test operation of LWR Water Environment Simulation Tests after the establishment.

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