Konvoi NPP Generic PSA evaluated for EDG reliability data in different scenarios

Based on PSA simulations from https://data.mendeley.com/datasets/4nmvpnst8h/1, the generic PSA was slightly modified, including two basic events, for the Common Cause Failure (CCF) to start of all 4 Emergency Diesel Generators (EDGs) of subsystem EDG 1 to 4 (1XKXJFSCCF_ALL ) and of subsystem EDG 5 to 8 (5XKXJFSCCF_ALL). The modified PSA was evaluated to consider the testing adverse effects of EDG fail to start events (independent and common cause failures) in several scenarios combining aging, test degradation and two values of test efficiency (80% and 90%). Two CCF models were analyzed for the EDG Common Cause Failure rate; the traditional considering only the standby time and an expanded model that considers, additionally, the contribution derived from the repair time unavailability of the components belonging to the CCF group. The Database includes the results of 22 simulations, one half for the traditional CCF model and the other half for the expanded CCF model.

基于https://data.mendeley.com/datasets/4nmvpnst8h/1提供的PSA（概率安全分析）模拟，对通用PSA进行了轻微调整，包括两个基本事件，以触发子系统EDG 1至4（1XKXJFSCCF_ALL）以及子系统EDG 5至8（5XKXJFSCCF_ALL）的全部4个应急柴油发电机组（EDG）的共因故障（CCF）。经评估，该调整后的PSA旨在考虑EDG无法启动事件（独立故障和共因故障）的测试不利影响，这些影响通过结合老化、测试退化和两种测试效率值（80%和90%）的多个场景进行综合分析。针对EDG的共因故障率，分析了两种CCF模型：一种是传统的仅考虑备用时间的模型，另一种是扩展模型，该模型除考虑备用时间外，还考虑了CCF组内组件维修时间不可用性的贡献。数据库包含了22次模拟的结果，其中一半用于传统的CCF模型，另一半用于扩展的CCF模型。