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A melcor-based model to Calculate vapor natural Circulation in pressurized Water reactor high-pressure Severe accidents

机译:基于melcor的压水堆高压严重事故蒸气自然循环计算模型

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摘要

The ability of the probabilistic safety assessment code MELCOR 1.8.2 to deal with station blackout accidents, Characterized by prolonged in-vessel and primary sys- Tem vapor natural circulation, is analyzed. Results of the Analysis reconmmended a modification of the gravita- Tional term in the momentum equation and the inclusion Of the convective term to capture in-vessel natural circu- Lation. Moreover, certain gudielines to build the thermal- Hydraulic and core degradation numerical meshes must Be respected.
机译:分析了概率安全评估代码MELCOR 1.8.2处理车站停电事故的能力,其特征是长时间的船内和主要系统蒸气自然循环。分析结果建议对动量方程式中的引力项进行修改,并包括对流项以捕获容器内自然循环。此外,必须遵循某些准则来建立热力-水力和岩心退化数值网格。

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