Patent ID: 9443620
Filing Date: 2016-09-13
CPC Classification: G21C,Y02E

Claim Text:
1. A reactor containment vessel comprising: a primary reactor containment vessel containing a reactor pressure vessel and having a certain pressure resistance higher than atmospheric pressure and a certain leak-tightness; a secondary reactor containment vessel installed outside of the primary reactor containment vessel and having a pressure resistance and a leak-tightness equivalent to the pressure resistance and the leak-tightness of the primary reactor containment vessel; an air bag installed in a folded state in the secondary reactor containment vessel, and upon an occurrence of an accident in the primary reactor containment vessel, the air bag is configured to a gas phase vent pipe connecting the primary reactor containment vessel and the air bag, wherein a pressure in the air bag is equalized with a pressure in the secondary containment vessel at a time when expansion of the air bag is finished, thereby passively preventing leakage of the high-pressure gas from the primary containment vessel and the air bag.