概率安全分析(Probabilistic Safety Analysis,PSA)已经广泛的应用于核电厂,它对核电厂设计、运行的作用日益受到重视。然而,PSA在研究堆中的应用却不像在核电厂中应用的那样广泛,世界各国对其要求也不同。调研了国内外PSA在研究堆中的应用情况,分析了应用的目标、范围和依据。PSA在研究堆中的应用常根据实际需要来决定分析的 Probabilistic Safety Analysis (PSA) has been widely used in nuclear power plants. Its role in the design and operation of nuclear power plants is gaining more and more attention. However, the application of PSA in research reactors is not as extensive as that applied in nuclear power plants, and the requirements of countries in the world are different. The application of PSA in research reactor at home and abroad was investigated, and the target, scope and basis of the application were analyzed. The application of PSA in research reactors is often based on actual needs