NUCLEAR REACTOR FUEL HEALTH MONITOR

摘要

Provided is a nuclear reactor fuel integrity monitor capable of periodicailly sampling a coolant or a dissolved gas of a nuclear reator from a sampling point without an operator's labor and measuring a concentration of a specific radionuclide included in the coolant or the dissolved gas of the nuclear reactor. A nuclear reactor fuel integrity monitor includes: a ³-ray detector which detects ³-ray of a specific radionuclide of a subject measurement medium of a nuclear reactor; a sample container which retains the subject measurement medium therein and surrounds the circumference of the ³-ray detector; and a measurement control device which performs a control so that a predetermined amount of the subject measurement medium is introduced into the sample container and calculates a concentration of the specific radionuclide from ³-ray data per each unit time detected by the ³-ray detector and a volume of the subject measurement medium introduced into the sample container.