Emergency water complementing system of auxiliary water supply tank in nuclear power station

The utility model discloses an emergency water complementing system of an auxiliary water supply tank in a nuclear power station. The emergency water complementing system comprises a fire coupling, a movable type water complementing pump, a water conveying soft pipe and a pumping pipe, wherein the fire coupling is installed outside an auxiliary water supply tank workshop; the water conveying soft pipe can rapidly realize the connection of the movable type water complementing pump and the fire coupling outside the workshop; and the pumping pipe is used for connecting the movable type water complementing pump to an available water source in a nuclear power station. The emergency water complementing system further comprises an outer isolating valve which is arranged outside the workshop, wherein an air exhaust valve is further arranged between the outer isolating valve and the fire coupling. Compared with the prior art, under the condition that a station blackout accident in the nuclear power station exceeds a design reference working condition, the movable type water complementing pump can be rapidly transported to the available water source in the nuclear station, the pumping pipe and the water conveying soft pipe are rapidly installed, and after a self-supplying power device of the mobile type water complementing pump is started, the auxiliary water supply tank is filled with water in time, so that the guarantee that the water is supplied to a steam generator through an auxiliary water supply pneumatic pump is provided, the important role of preventing serious accidents is brought into play, and the security of the nuclear station is improved.