| 摘要 |
PROBLEM TO BE SOLVED: To provide a burn-up measuring technique capable of simplifying maintenance work during maintenance inspection.SOLUTION: A burn-up measuring device 10 includes: a manipulation unit 11 that manipulates a crane 31 moving up/down a spent fuel assembly 21 toward an interior of a container 22 while grasping an upper end of the spent fuel assembly 21; an acquisition unit 12 that acquires moving information p on the spent fuel assembly 21 from a moving body sensor 23 provided on an inner circumferential surface of this container 22; a detection unit 13 that detects a radiation intensity signal q from a radiation sensor 24 provided on the inner circumferential surface of the container 22; and a derivation unit 14 that derives a radiation distribution in a longitudinal direction of the spent fuel assembly 21 from the moving information p and the radiation intensity signal q. |
