近年来,国内外进行多项研究堆概率安全分析,其中管道破口导致的失水事故是堆芯损坏的重要风险来源。本文参考管道破口计算程序PRAISE(Piping Reliability Analysis Including Seismic Events)方法,选取压力壳型研究堆——高通量工程试验堆(High Flux Engineering Test Reactor,HFETR)的运行工况,对其反应堆冷却剂出口管道的焊缝进行分析,得到运行中该处焊缝发生各类破口的频率。 In recent years, a number of research reactors have carried out probability and safety analyzes both at home and abroad. Among them, the water loss accident caused by pipeline breakage is an important risk source of core damage. In this paper, the PRAISE (Piping Reliability Analysis Including Seismic Events) method is used to select the operating conditions of High-Flux Engineering Test Reactor (HFETR) Agent outlet pipe weld analysis, where the operation of the weld where the frequency of various types of break.