Waste management scenario in the hot cell and waste storage for DEMO
染谷 洋二; 飛田 健次; 柳原 敏*; 近藤 正聡*; 宇藤 裕康; 朝倉 伸幸; 星野 一生; 中村 誠; 坂本 宜照
Someya, Yoji; Tobita, Kenji; Yanagihara, Satoshi*; Kondo, Masatoshi*; Uto, Hiroyasu; Asakura, Nobuyuki; Hoshino, Kazuo; Nakamura, Makoto; Sakamoto, Yoshiteru
In the replacement period of a fusion power reactor, the assembly of blanket or divertor modules need to be removed from the reactor in order to minimize remote maintenance in the vacuum vessel and to attain a reasonable plant availability. In the hot cell, the modules will be removed from the backplate of the assembly. Here, note that the active cooling must be done by a way that does not cause contamination of the hot cell environment due to dispersion of tritium and tungsten dust. In this sense, the cooling scenario is adopted that the existing pipe of cooling water in the assembly is connected to a different cooling water system in the hot cell. In this scenario, the temperature of the assembly is maintained about 40-100$$^{circ}$$C. On the other hand, the structural material (RAFM) of the blanket and divertor is not recycled due to its high contact dose rate. It should be crushed into small pieces to reduce volume of the waste and required storage space. Here, the decay heat must be removed by natural convection to keep the temperature below 65$$^{circ}$$C for preventing water evaporation from the mortar. The RAFM is kept in the interim storage during 12 years until the required temperature conditions for mortar are ensured and then is disposed of.
使用言語 : English
掲載資料名 : Fusion Engineering and Design
: 89
: 9-10
ページ数 : p.2033 - 2037
発行年月 : 2014/10
出版社名 : Elsevier
発表会議名 : 11th International Symposium on Fusion Nuclear Technology (ISFNT-11)
開催年月 : 2013/09
開催都市 : Barcelona
開催国 : Spain
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登録番号 : BB20131533
抄録集掲載番号 : 42001271
論文投稿番号 : 14910
Accesses  (From Jun. 2, 2014)
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