Key aspects of the safety study of a water-cooled fusion DEMO reactor

Makoto Nakamura, Kenji Tobita, Youji Someya, Hisashi Tanigawa, Werner Gulden, Yoshiteru Sakamoto, Takao Araki, Kazuhito Watanabe, Hisato Matsumiya, Kyoko Ishii, Hiroyasu Utoh, Haruhiko Takase, Takumi Hayashi, Akira Satou, Taisuke Yonomoto, Gianfranco Federici, Kunihiko Okano

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10 Citations (Scopus)

Abstract

Key aspects of the safety study of a water-cooled fusion DEMO reactor is reported. Safety requirements, dose target, DEMO plant model and confinement strategy of the safety study are briefly introduced. The internal hazard of a water-cooled DEMO, i.e. identification of hazardous inventories, identification of stored energies that can mobilize these hazardous inventories and identification of accident initiators and scenarios, are evaluated. It is pointed out that the enthalpy in the first wall/blanket cooling loops, the decay heat and the energy potentially released by the Be-steam chemical reaction are of special concern for the water-cooled DEMO. An ex-vessel loss-of-coolant accident (ex-VV LOCA) of the first wall/blanket cooling loop is also quantitatively analyzed. The integrity of the building against the ex-VV LOCA is discussed.

Original languageEnglish
Article number1405139
JournalPlasma and Fusion Research
Volume9
DOIs
Publication statusPublished - 2014

Keywords

  • Accident scenario analysis
  • Hazard analysis
  • Safety study
  • Safety system
  • Water-cooled fusion DEMO

ASJC Scopus subject areas

  • Condensed Matter Physics

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    Nakamura, M., Tobita, K., Someya, Y., Tanigawa, H., Gulden, W., Sakamoto, Y., Araki, T., Watanabe, K., Matsumiya, H., Ishii, K., Utoh, H., Takase, H., Hayashi, T., Satou, A., Yonomoto, T., Federici, G., & Okano, K. (2014). Key aspects of the safety study of a water-cooled fusion DEMO reactor. Plasma and Fusion Research, 9, [1405139]. https://doi.org/10.1585/pfr.9.1405139