Pressurized water reactor primary circuit pressure-bearing boundary leakage positioning and monitoring system and method

The invention relates to the technical field of marine pressurized water reactor nuclear leakage monitoring, in particular to a pressurized water reactor primary loop pressure-bearing boundary leakage positioning monitoring system and method.The system comprises a plurality of sampling ports, a gas flow meter, a vacuum meter, a radioactive gas activity concentration detection device and a sucking pump; the radioactive gas in the reactor cabin is collected by the plurality of sampling ports and then enters the gas flow meter; the gas flowmeter is connected with the radioactive gas activity concentration detection device; the radioactive gas activity concentration detection device is connected with the sucking pump; and the vacuum meter is connected with the gas flowmeter. The method is suitable for estimating the position of the leakage in the nuclear reactor cabin under the working condition that the leakage rate changes slowly, the monitoring reliability is high, the position area of the leakage in the nucle