为了指导中国自主开发的严重事故一体化分析程序的验证工作，开展了压水堆严重事故现象识别与排序表（phenomenon identification and ranking tables, PIRT）方法研究及实践。基于对严重事故现象学研究和PIRT开发流程梳理，参考国际现有研究基础，确定了压水堆严重事故PIRT开发流程，及其实施过程所需要的具体筛选原则、评价准则和评级方法等操作依据；并据此建立了压水堆严重事故PIRT表。研究成果可为压水堆严重事故分析程序的验证以及相关实验研究工作提供指导。

In order to guide the validation of the domestic autonomous integrated analysis code for severe accidents, research and practice on the phenomenon identification and ranking tables (PIRT) method for severe accidents in pressurized water reactors were carried out. Based on the study of severe accident phenomenology and the development process of PIRT, and referring to existing international research foundations, the development process of PIRT for severe accidents in pressurized water reactors was determined, along with the specific screening principles, evaluation criteria, and rating methods required for implementation. On the basis of the above research, the PIRT table for severe accidents in pressurized water reactors was established. The research results can provide guidance for the validation of severe accident analysis code for pressurized water reactors and related experimental research work.