System and method for detecting leakage of nuclear reactor coolant using laser induced emission spectrum

摘要

System and method for detecting and/or predicting in a field the leakage of nuclear reactor coolant that may occur at the pressure boundary of the primary system of a nuclear reactor. The system and method for detecting the leakage of nuclear reactor coolant uses a laser induced emission spectrum. The leakage of coolant is detected by detecting boron (B), a main component of the coolant, in corrosive products generated at the nuclear reactor pressure boundary on the basis of laser spectroscopy. An embodiment of the system for detecting leakage of nuclear reactor coolant may include a laser generator, a laser focusing lens, an emission collector, and emission spectrum analyzer.

主权项

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.