Passive condensation tank cooling system of passive auxiliary feedwater system
Proposed is a passive condensation tank cooling system of a passive auxiliary feedwater system, the cooling system allowing a passive condensation tank to include an inner wall and an outer wall and a cooling means to be interposed between the inner wall and the outer wall, thereby suppressing the increase in the temperature of the heat exchange water in a condensation process in the passive condensation tank. To this end, proposed is the passive condensation tank cooling system of a passive auxiliary feedwater system, the cooling system including: a passive condensation tank having a water storage space to store heat-exchange water; and a condenser arranged to be immersed in the heat-exchange water in the passive condensation tank, wherein the passive condensation tank includes the outer and inner walls providing the water storage space and a cooling means interposed between the walls for absorbing heat of the heat-exchange water.
1 . A passive condensation tank cooling system of a passive auxiliary feedwater system, the cooling system comprising:
a passive condensation tank including:
outer walls defining an exterior of the passive condensation tank, the outer walls including:
outer lateral side walls, and
an outer bottom wall;
inner walls disposed inside the outer walls, the inner walls including:
inner lateral side walls, and
an inner bottom wall,
wherein the inner lateral side walls are and spaced apart from the outer lateral side walls, and the inner bottom wall is spaced apart from the outer bottom wall;
a water storage space formed by the inner walls and storing heat-exchange water; and
a refrigerant storage space formed between the outer walls and the inner walls and extending along the inner lateral side walls and the inner bottom wall, the refrigerant storage space storing being configured to store a refrigerant,
wherein the water storage space and the refrigerant storage space are separated by the inner walls such that the heat-exchange water and the refrigerant remain isolated from each other even when the refrigerant storage space is completely filled with the refrigerant;
a condenser arranged inside the water storage space to be immersed in the heat-exchange water;
a steam supply pipe connected to an inlet of the condenser to allow steam to be introduced into the condenser; and
a condensate water recovery pipe connected to an outlet of the condenser to allow water condensed by the condenser to flow out of the condenser,
wherein the refrigerant in the refrigerant storage space is configured to absorb heat of the heat-exchange water in the water storage space.
2 . The cooling system of claim 1 , wherein the outer walls are made of concrete, and the inner walls are made of metal.
3 . The cooling system of claim 1 , wherein the refrigerant is a fluid including one or more among molten salt and water.
4 . The cooling system of claim 1 , further comprising:
a heat exchanger disposed outside the passive condensation tank;
a circulation flow path between the refrigerant storage space and the heat exchanger;
a circulation pump disposed in the circulation flow path,
wherein the refrigerant in the refrigerant storage space is configured to be circulated through the circulation flow path by the circulation pump.
5 . The cooling system of claim 2 , wherein the refrigerant is a fluid including one or more among molten salt and water.