METHOD OF WATER FEED Russian patent published in 2012 - IPC G21D1/02 

FIELD: process engineering.

SUBSTANCE: invention relates to nuclear power production, particularly, to water treatment in makeup water supply to secondary coolant circuit in standby conditions. Water feed from, mainly, separator into evaporator boiler water distribution chamber and forcing it through second circulation loop evaporator tube bank in standby conditions with nuclear reactor maintained hot by proper heat comprises actuating nuclear reactor in intermittent mode during a day at low power with forcing reactor first coolant circuit liquid-metal heat carrier at low rpm of second coolant circuit makeup water pump. After said low-power actuation, water is preliminarily fed from pressure pipe via makeup water pump into evaporator boiler water distribution chamber to design water level in separator. Then, separator and evaporator water levels are leveled by separator pressure reduction After starting makeup water pump at low rpm, second coolant circuit water temperature is controlled by increasing separator pressure on feeding steam of required parameters Note here that second coolant circuit boiler water temperature increase rate is controlled by linear time ratio not exceeding 1-3 degrees centigrade a minute.

EFFECT: ruled out cyclic thermal stresses in heat exchangers.

2 dwg