METHOD FOR DETECTING LEAKY THERMAL ELEMENTS OF ASSEMBLIES OF NUCLEAR REACTOR WITH LIQUID METAL HEAT CARRIER Russian patent published in 2017 - IPC G21C17/07 G01M3/00 

FIELD: power industry.

SUBSTANCE: method for detecting leaky thermal elements of assemblies of a nuclear reactor with a liquid metal heat carrier is that above the fuel assemblies in the core, leak test devices are installed for fuel assemblies and, under pressure, a gas is supplied to the heat carrier which, together with the gaseous fission products dissolved in the heat carrier, is then withdrawn from the reactor to the sensors of radioactivity control. The pipe control device is inserted into a cylindrical tube of a material with channels for the passage of the bubble tube and the gas outlet and N devices of leak test, the number of N devices selected is at least 4, one device is placed above the center fuel assembly, and the other devices are arranged around this device in the region Rn, Rn is the distance from the central fuel assemblies to the first or second FA, radioactivity control is performed of gaseous products in the reactor at power running, and if the radioactivity level exceeds the allowable values tions, a conclusion is made about depressurization of the fuel element in a part of the core.

EFFECT: invention allows to reduce a simple reactor due to the search for fuel assemblies with damaged fuel rods, to expand the range of controlled fission products.

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