SEAFP-2 bounding accident analyses

Analyses have been performed of the potential consequences to the public of hypothetical loss-of-coolant accidents in conceptual fusion power plant de signs. In order to establish upper bounds to the consequences of such event s, a case has been studied in which total loss of all active cooling has be en assumed, with no remedial intervention for the duration of the accident sequence. The analyses are based on three conceptual power plant designs, t wo of them similar to those assumed in the earlier safety and environmental assessment of fusion power (SEAFP) study (Raeder et al., 1995), with updat ing of assumed structural materials. The three models studied provide a bro ad range of design options. In all cases the decay-heat driven temperature: transients are well below the level at which structural melting would begi n. Based on conservative assumptions, mobilisation. release and dose calcul ations show that potential maximum doses to the public are very far below t he levels at which evacuation might be considered. (C) 2000 Elsevier Scienc e S.A. All rights reserved.