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PASSIVE SECONDARY CONDENSATION SYSTEM FOR LIGHT WATER REACTOR EQUIPPED WITH WATER SUPPLYING SYSTEM TO STEAM GENERATOR IN CASE OF EMERGENCY AGAINST STATION BLACKOUT OR DEFUNCTIONALIZATION OF PASSIVE AUXILIARY FEEDWATER SYSTEM IN NUCLEAR POWER PLANT
PASSIVE SECONDARY CONDENSATION SYSTEM FOR LIGHT WATER REACTOR EQUIPPED WITH WATER SUPPLYING SYSTEM TO STEAM GENERATOR IN CASE OF EMERGENCY AGAINST STATION BLACKOUT OR DEFUNCTIONALIZATION OF PASSIVE AUXILIARY FEEDWATER SYSTEM IN NUCLEAR POWER PLANT
The present invention has an objective to provide a passive secondary condensation system for a light water reactor equipped with an emergency water supplementing device for a steam generator, wherein water is readily supplied to the steam generator which is provided for emergent situations such as an intra-plant blackout of a nuclear power plant or a defunctionalization of a passive auxiliary water supply system, such that negligent accidents of a nuclear reactor are prevented. In order to accomplish this, the present invention comprises: a steam generator (110) for generating steam using the heat from the nuclear reactor; a main steam line (111) which is connected to a secondary side of the steam generator (110) and supplies the steam from the steam generator (110) to a turbine; main water lines (112;112-1,112-2) which recollect the water, which is generated by the condensation due to a heat exchange between the steam and cooling water, and supply the water to the steam generator (110); a condenser (120) which, when the operation of the nuclear reactor stops, condensates the steam from the steam generator (110) and supplies the result to the steam generator (110); a steam supply line (113) which is branched off from the main steam line (111) and connected to an inlet of the condenser (120); a condensate recollecting line (114) which connects an outlet of the condenser (120) to the main water lines (112); and an emergency water supplementing device (140) comprised of an emergency water line (141), which is connected to a flow path of the water supplied to the steam generator (110) and, when the operation of the nuclear reactor stops, supplies the water from fire pump truck (142) to the steam generator (110), and an emergency water valve (V18) which opens/closes the flow path of the emergency water line (141).
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