GAMMA RAY SHIELD STRUCTURE OF PRECAST CONCRETE PLATE

摘要

PROBLEM TO BE SOLVED: To provide a gamma ray shield wall and gamma ray shield floor that require only a small field work amount by using a precast concrete plate that has undergone leakage countermeasures of gamma rays in a clearance in a joint part and has a gamma ray shield performance.SOLUTION: A clearance 3 is disposed between adjacent joint parts of precast concrete plates 1 and 2. The precast concrete plates 1 and 2 have a gamma ray shield section 4 for shielding gamma rays by wrapping the joint parts including the clearance 3 from the outside. Specifically, the gamma ray shield section 4 is disposed integrally with one plate 2 of the adjacent precast concrete plates. Then, clearances 3 and 5 are formed in a plan-view crank shape having one right-angled part including the gamma ray shield section 4.