PRIMARY CIRCUIT ACCIDENT EXHAUST SYSTEM OF PRESSURIZED WATER REACTOR NUCLEAR POWER PLANT

摘要

A circuit accident exhaust system of a pressurized water reactor nuclear power plant. The system relates to an accident responding system of a pressurized water reactor nuclear power plant. The circuit accident exhaust system of the pressurized water reactor nuclear power plant comprises accident exhaust valves (3) connected between a reactor pressure container (1) and a normal exhaust valve (2). The accident exhaust valves (3) are divided into two series in parallel. Each series of the accident exhaust valves are guided out from the top of the reactor pressure container and formed by two serially-connected normally-closed magnetic valves. The two series are connected in parallel to a safety valve discharging pipeline of a pressure stabilizer and enter a pressure relieving tank. The system uses magnetic valves, and features stable and reliable performance and helps to take rapid actions, can effectively alleviate serious accident consequences and ensure the completeness of the reactor pressure container in a serious accident.