BETHSY装置是法国建造的一个体积比为1/100的三环路压水堆整体模拟台架。ISP-27是OECD原子能机构组织的一次以BETHSY装置上的一个标准实验为基础的国际程序评价活动,重点评价当今世界上广泛使用的反应堆热工水力最佳估算程序RELAP5的物理模型,同时检验各国用户使用程序的能力。标准实验是0.5%冷端破 BETHSY device is a French built a volume ratio of 1/100 of the Third Ring PWR whole analog bench. ISP-27 is an international program evaluation activity based on a standard experiment on the BETHSY device organized by the OECD Agency. It focuses on the physical model of RELAP5, which is the most widely used reactor thermal-hydraulic estimation program widely used in the world, The ability of the user to use the program. The standard experiment is 0.5% cold-end broken