FEED WATER TUBING CIRCULATING FACILITY IN NUCLEAR POWER PLANT

摘要

PURPOSE:To control corrosion by connecting a piece of final stage feed water heater downstream side tubing and a piece of reactor coolant purifying device downstream side tubing by a piece of bypass tubing while a separation valve is provided between a final stage feed water heater and the bypass tubing and circulating purifying system circulating water. CONSTITUTION:A separation valve 9 is provided in the downstream side of a final stage feed water heater 24 while a reactor coolant purifying system 3 and a piece of feed water tubing 4 are connected by a piece of bypass tubing 5. When the valve 9 and a reactor coolant purifying system valve 15 are closed and a bypass tubing inlet valve 6, a bypass tubing outlet valve 7 and a reactor pressure vessel outside separation valve 16 are opened, reactor coolant purifying system circulating water is circulated by a reactor coolant purifying system pump 11 through the tubing 4, 5. Therefore, the water is circulated and stored in the tubing 4 and corrosion from the tubing 4 at the time of plant stop can be controlled.