PURPOSE: To reduce the entire facility capacity and the number of refrigerators in each cooling facility of a containment vessel air recirculation system (CAC) and a service building ventilation system in a reactor.
CONSTITUTION: In order to make atmosphere temperature of the inside of a containment vessel 9 constant, a recirculation pump 1a for supplying cooling water to coolers for performing heat removal and a refrigerator 2d for performing the heat removal of the heat-exchanged cooling water in the coolers 3a-3d are equipped. Three refrigerators 4a-4c for removing heat load of a building ventilation system, SBV, and the inside of the containment vessel as the side of SBV, a CAC cooling water circulation pump 1b and refrigerator 2b as common spare, a flow control valve 17, cutoff valves 19a, 19b and a return valve 16 for removing the heat load of the inside of CAC at the time of normal operation, a flow control valve 13 for supplying the cooling water to a building ventilation system 13 and tubing 14 for connecting CAC and SBV are constituted.
NAKAMURA FUMITO
HIRAO SEIZO
HITACHI NUCLEAR ENG
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