STUDY OF THE PWR HYBRID SAFETY SYSTEM

In recent years, studies to apply passive safety system to PWRS have b een performed by many organizations. On the other hand, studies to imp rove the conventional active safety systems are also being evaluated. This article shows another approach to improve the PWR safety systems. The Hybrid Safe System which is a combination of a passive safety sys tem and an active safety system has a possibility to improve both reli ability an plant economy. In this article, a selection of elemental te chnologies to construct the whole-system are discussed. Then, operatio nal signal and reactor cooling after the grace period are discussed.