Passive cooling system of containment building and nuclear power plant comprising same

A passive containment building cooling system, comprising:

• a containment building;
• an emergency fluid storage section positioned outside the containment building and configured to store heat exchange fluid therein;
• a plurality of plate-type heat exchanger positioned inside the containment building, each plate-type heat exchanger comprising containment atmosphere flow path channels configured to flow containment atmosphere along one side of a plate of the heat exchanger and fluid flow path channels configured to flow the heat exchange fluid along the other side of the plate of the heat exchanger;
• and
• a line passing through the containment building and configured to supply the heat exchange fluid from the emergency fluid storage section to the fluid flow path channels of the plurality of plate-type heat exchangers and return the heat exchanger fluid to the emergency fluid storage section,
• wherein the plurality of plate-type heat exchangers are connected in parallel along the line via an inlet header connected between the line and an inlet region of each fluid flow path channel and an outlet header connected between an outlet region of each fluid flow path channel and the line,
• wherein the plurality of plate-type heat exchangers are connected in parallel to an inside of the containment building and each plate-type heat exchanger comprises an inlet guide configured to receive the containment atmosphere from the inside of the containment building and direct the containment atmosphere to the containment atmosphere flow path channels and an outlet guide configured to return the containment atmosphere from the atmosphere flow path channels to the inside of the containment building, and
• wherein the plurality of plate-type heat exchangers are arranged adjacent to one another and each plate-type heat exchanger further comprises a casing configured to cool containment atmosphere passing through an intermediate flow path defined by spaces between adjacent plate-type heat exchangers.