Abstract
Decay heat in the blanket and shield of the Fusion Experimental Reactor (FER) was calculated using a newly developed radioactivation calculation code system THIDA-2. The decay heat at various time periods after shutdown were calculated. The decay heat level in the FER blanket was found to be at least one order of magnitude lower than in fission reactors at all time periods after shutdown. The necessity of following the transport of decay γ-rays in obtaining the detailed distribution of decay heat in the blanket was demonstrated. The validity of the γ-ray kerma factors used in the evaluation was also shown.
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