Waste management scenario in the hot cell and waste storage for DEMO

Youji Someya, Kenji Tobita, Satoshi Yanagihara, Masatoshi Kondo, Hiroyasu Utoh, Nobuyuki Asakura, Kazuo Hoshino, Makoto Nakamura, Yoshiteru Sakamoto

Research output: Contribution to journalArticle

5 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)2033-2037
Number of pages5
JournalFusion Engineering and Design
Volume89
Issue number9-10
DOIs
Publication statusPublished - 2014 Oct
Externally publishedYes

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Keywords

  • DEMO
  • Hot cell
  • Radioactive waste
  • Waste storage

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Mechanical Engineering

Cite this

Someya, Y., Tobita, K., Yanagihara, S., Kondo, M., Utoh, H., Asakura, N., Hoshino, K., Nakamura, M., & Sakamoto, Y. (2014). Waste management scenario in the hot cell and waste storage for DEMO. Fusion Engineering and Design, 89(9-10), 2033-2037. https://doi.org/10.1016/j.fusengdes.2014.04.059