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Report No.
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Blanket-related safety characteristics of a fusion DEMO reactor

Tanigawa, Hisashi; Nakamura, Makoto; Someya, Yoji; Masui, Akihiro; Watanabe, Kazuhito

Blanket in fusion nuclear reactor has three functions such as neutron shielding, heat recovery and tritium breeding. The blanket in ITER is called as Shielding blanket because it has only a function of neutron shielding. The blanket with heat recovery and tritium breeding functions will be equipped with fusion DEMO reactor for the first time. Therefore it is important to study event sequences and their effects related to the blanket for understandings of safety characteristics in DEMO plants. For both of ITER and DEMO, it is the same that a vacuum vessel is treated as the first container against radioactive materials. Safety-related events including in-vessel LOCA and in-box LOCA are analyzed and their effects on the vacuum vessel are assessed.

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