NUCLEAR STEAM GENERATING UNIT Russian patent published in 2004 - IPC

FIELD: nuclear power engineering; nuclear power plants. SUBSTANCE: proposed nuclear steam generating unit is equipped with electrically actuated valves making it possible to sustain any pressure drop between primary circuit and boric acid solution tank that may occur in service under transient conditions as valve stem is assembled of two parts, internal and external ones, joined together by means of electromagnetic latch; outer surface of pipe is threaded to receive electric actuator nut. Nuclear steam generating unit incorporates provision for stopping chain reaction and shutting down nuclear reactor in case of failure of mechanical emergency shutdown device. EFFECT: enhanced safety of nuclear steam generating unit. 1 cl, 4 dwg