管壁减薄对严重事故工况下传热管断裂的影响及缓解措施的有效性

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Analyses of Effect of SG Tube Thickness on Induced-SGTR and Effectiveness of Mitigation Measures

摘要: 严重事故的恶劣条件(反复的冷热交替及一、二回路之间的压差)可能导致蒸汽发生器(SG)传热管发生蠕变断裂。本文基于一级概率安全分析(PSA)的分析结果确定的典型事故序列,计算分析SG传热管壁减薄对严重事故工况下诱发蒸汽发生器传热管断裂(SGTR)的影响,给出严重事故缓解措施,例如一回路降压和给SG补水的有效性计算。
- 诱发SGTR /
- 传热管壁厚 /
- 严重事故缓解措施
Abstract: The adverse conditions in a severe accident,such as repeated alternation of cold and hot conditions or the pressure difference between RCS（Reactor Coolant System） and the secondary side,may induce the creep rupture of steam generator tubes.Based on the typical accident sequences defined by level 1 PSA analysis,this study identifies the effect of thickness reduction of steam generator tubes on inducing SGTR and analyzes the effectiveness of severe accidents mitigation measures,such as RCS depressurization and recovery of feedwater to SG.
- Induced-SGTR /
- Thickness of SG tube /
- Severe accident mitigation measures