RADIATION SYSTEM FOR MONITORING LEAKS IN PIPELINE OF NPP WITH WATER COOLANT Russian patent published in 2016 - IPC G21D1/02 

FIELD: physics; nuclear physics.

SUBSTANCE: invention relates to monitoring nuclear power plant with water heat carrier. System contains a complex of measurement of activity of the analysed medium, including radioactive radiation sensor (6) and device for sampling and transportation of analyzed medium to radiation sensors (6), and information-computing device (10). On each controlled section of pipeline (1) there are additionally installed at least two complexes for measurement of activity of the environment, including radiation sensors (6), which is selectively sensitive to radiation of nitrogen-16. Radiation sensors (6) are located along the whole length of the pipeline (1) at known distances. Device for sampling and transportation of analyzed medium is made in the form of branch pipes (5) passing through the heat insulation (2) of the pipeline (1). Some ends of nozzles (5) are brought in sub-insulation space (4) of the pipeline (1), and the other ends of nozzles (5) are brought to radiation sensors (6). Location and mass flow rate of leak are determined by readings of the involved complexes measuring activity of nitrogen-16.

EFFECT: high accuracy of determining location and mass flow rate of leak.

1 cl, 1 dwg