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Title
Japanese: 
English:Waste management scenario in the hot cell and waste storage for DEMO 
Author
Japanese: 染谷 洋二, 飛田 健二, 近藤正聡, 柳原 敏.  
English: yoji Someya, kenji Tobita, Masatoshi Kondo, Satoshi Yanagihara.  
Language English 
Journal/Book name
Japanese: 
English:Fusion Engineering and Design 
Volume, Number, Page Vol. 89        pp. 2033-2037
Published date May 14, 2014 
Publisher
Japanese: 
English:Elsevier 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL http://dx.doi.org/10.1016/j.fusengdes.2014.04.059
 
Abstract Management strategy of radioactive waste generated in periodic replacement may be important in the point of view of fusion reactor design, because it has a large impact on the design of the hot cell and waste storage in the plant. In the replacement period of a fusion power reactor, the assembly of blanket or divertor modules needs to be removed from the reactor in order to minimize remote maintenance in the vacuum vessel and to attain reasonable plant availability. In the hot cell, the modules will be removed from the back plate 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. On the other hand, it is assumed that the structural material (F82H) 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. In this paper, the basic idea of the waste management scenario and the conceptual design in the hot cell and waste storage for DEMO has been proposed.

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