FAILED FUEL INSPECTION DEVICE AND FAILED FUEL INSPECTION METHOD

摘要

PROBLEM TO BE SOLVED: To enable a failed fuel inspection for detecting a radiation leak in a spent fuel aggregate without lifting up the spent fuel aggregate.SOLUTION: A failed fuel inspection device 100 for inspecting presence/absence of a failure in fuel rods in each spent fuel aggregate 10 sunk under cooling water includes: sipper caps 51 removably mounted on the upper parts of the spent fuel aggregates 10 and forming spaces where the upper parts of the spent fuel aggregates 10 are closed; heating rods 41 penetrating the sipper caps 51, inserted to gaps between the fuel rods, and performing heating in the spent fuel aggregates 10; sampling pipes 52 penetrating the sipper caps 51 and deriving gas from upper spaces; and an inspection unit 50 for detecting a radioactive material in gas taken out by the sampling pipes 52.