Removal degassing apparatus and method for nuclear reactor coolant gas dissolved

The present invention provides for the removal of nuclear reactor coolant degassing apparatus dissolved gases, comprising a reservoir tank for storing a pre-coolant, the pre-storage tank and communicating at its downstream degassing membrane unit, the membrane degassing unit and a vacuum pump in communication, a nitrogen supply device, the deaeration membrane unit for receiving the coolant and the removal of dissolved gases in the coolant, the degassing membrane unit having a gas channel, the vacuum pump used for evacuation of the gas channel, said means for inputting a nitrogen gas supply nitrogen to the gas passage. Low energy consumption of the degassing device, a low manufacturing cost, simple equipment, the removal rate. The present invention also provides a method of nuclear reactor coolant degassing of dissolved gas removal.