自然循环冷却的钢制安全壳压力响应敏感性分析

非能动安全壳空气冷却系统(PAS)是模块化小型堆的重要组成部分,也是安全壳设计的核心。该系统保证安全壳压力不超过设计限值,保证安全壳完整性。本文采用拉丁超立方抽样(LHS)的方法对可能影响安全壳压力响应过程的13个参数进行了系统的敏感性分析。研究结果表明壳内初始温度、壳外气体温度对安全壳压力响应过程最为敏感。本文首次使用通用的最佳估算安全壳分析软件和统计分析方法进行安全壳压力响应敏感性分析,该研究结果为安全壳设计、安全分析和安全评审提供技术支持。

Sensitivity Analysis of Pressure Response in Containment Cooled by Natural Circulation

Passive containment air cooling system(PAS) is a very important system of modularized small nuclear power plants, which is the key part in the design of the containment. This system can ensure that the pressure is below the design limit and guarantee the integrity of the containment. This paper analyzes the sensitivity of 13 parameters that may influence the containment pressure response, using the Latin hypercube sampling(LHS). The results showed that the initial temperature in the containment and the temperature of the environment are most sensitive to the pressure response. In this paper, the sensitivity analysis of the containment pressure is carried out by using a general best estimate software and a statistical analysis method in the first time. This result can support the design of the containment, the safety analysis and the safety review.