CPR1000延长ILRT周期研究

10 a一次的安全壳整体密封性试验（ILRT）必须占用大修关键路径，时长约100 h。美国94台核电机组已基于安全壳性能评价将ILRT周期延长至15 a。本研究介绍了美国相关安全壳性能评价要求，分析了CPR1000机组延长ILRT周期历史中试验、检查数据的可用性，并以岭澳核电站二期为例计算了延长ILRT周期后的风险，风险增量非常小。结果表明，CPR1000机组基本具备延长ILRT周期的条件。 

Study on Extension of Containment ILRT Cycle of CPR1000

The containment ILRT for 10 years occupies the critical path of refueling for about 100 hours. 94 nuclear power units in the United States have extended the containment ILRT cycle to 15 years based on containment performance evaluation. This paper introduces the performance evaluation requirements of the relevant containment in the United States in detail, and analyzes the extension of the ILRT cycle by the CPR1000 unit, and the availability of historical test data and inspection data. Taking a CPR1000 demonstration unit as an example, the risk after prolonging the safety test of the containment is calculated, and the risk increment is very small. The results show that the CPR1000 unit basically is with the conditions to extend the test period of the containment seal.