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SEAFP-2 bounding accident analyses

N.P Taylor, I Cook, C.B.A Forty, W.E Han, P Taylor2000年Fusion Engineering and DesignIF 1.7出版社

AbstractAnalyses have been performed of the potential consequences to the public of hypothetical loss-of-coolant accidents in conceptual fusion power plant designs. In order to establish upper bounds to the consequences of such events, a case has been studied in which total loss of all active cooling has been assumed, with no remedial intervention for the duration of the accident sequence. The analyses are based on three conceptual power plant designs, two of them similar to those assumed in the earlier safety and environmental assessment of fusion power (SEAFP) study (Raeder et al., 1995), with updating of assumed structural materials. The three models studied provide a broad range of design options. In all cases the decay-heat driven temperature transients are well below the level at which structural melting would begin. Based on conservative assumptions, mobilisation, release and dose calculations show that potential maximum doses to the public are very far below the levels at which evacuation might be considered.

日本語訳

核融合発電所の概念設計における仮想的な冷却材喪失事故が公衆へ及ぼす潜在的な影響についての解析が実施された。そのような事象の影響の上限を確定するために、事故シーケンスの期間中、能動的な冷却がすべて喪失し、是正措置が一切取られないケースが検討された。本解析は3つの概念発電所設計に基づいており、そのうちの2つは、構造材料の想定を更新した上で、以前のSEAFP(核融合出力の安全性および環境影響評価)研究(Raeder et al., 1995)で想定されたものと類似している。検討した3つのモデルは、幅広い設計オプションを提供するものである。すべてのケースにおいて、崩壊熱による温度過渡変化は、構造材料の溶融が始まるレベルをはるかに下回っていた。保守的な仮定に基づく移動率、放出率、および線量計算により、公衆への潜在的最大線量は、避難が検討されるレベルをはるかに下回ることが示された。

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