Nuclear power plant and non-condensable gas extraction method therefor

摘要

A nuclear power plant includes a moisture separator reheater (13), a condenser (15), and a working steam system (24) for a steam jet air ejector (17) for continuously extracting a non-condensable gas from the condenser. The steam jet air ejector includes a pressure-regulating unit (38) configured to regulate a working steam supplied to the steam jet air ejector from the condenser to a specified pressure, a working steam supply system (28) configured to supply the working steam to the pressure-regulating unit, and a working steam delivery system (36) configured to deliver the working steam regulated by the pressure-regulating unit to the steam jet air ejector. The working steam supply system includes a working steam source of a reactor main steam or moisture separator reheater scavenging steam, and a steam switching control system steam for switching a jet air ejector working steam from the reactor main steam to the moisture separator reheater scavenging steam by moisture separator reheater scavenging steam pressure.