Patent ID: 8855259
Filing Date: 2014-10-07
Classification: G01J,G01N,G21C,Y02E

Abstract:
1. A method of detecting leakage of nuclear reactor coolant, the method being performed using an apparatus for detecting leakage of nuclear reactor coolant, which includes a laser generator for generating laser beam; a laser focusing lens for focusing the laser beam generated by the laser generator; an emission collector for collecting light from plasma emission which is induced on a target material when the laser beam focused by the laser focusing lens is concentrated on the target material; an emission spectrum analyzer for analyzing the light collected by the emission collector, and a transfer device to which the laser focusing lens and the emission collector are attached, wherein the target material consists of depositions and impurities generated at the pressure boundary of the nuclear reactor, comprising: a) using the transfer device to move at least the laser focusing lens and the emission collector of the apparatus close to the target material; b) controlling a focal distance of the laser beam with respect to the target material after a); c) after the focal distance has been controlled, radiating the laser beam onto the target material; d) collecting light of a plasma emission induced on the target material at c) by using the emission collector; and e) analyzing the collected light using a relative ratio of intensity of an emission line of only iron (Fe) in the emission spectrum to intensity of an overlapping emission line of boron (B) and iron.