ZIRCONIUM-BASED ALLOY, FUEL ASSEMBLY FOR WATER COOLING TYPE NUCLEAR REACTOR USING IT, AND CHANNEL BOX

摘要

PROBLEM TO BE SOLVED: To suppress corrosion and hydrogen absorption of a zirconium-based alloy. SOLUTION: Alloy components of the zirconium-based alloy used for a fuel rod 14, a spacer 17, a water rod 22, or a channel box 23 of a fuel assembly 10 loaded on a water cooling type nuclear reactor are zirconium, tin, iron, chromium and inevitable impurities. Assuming that a tin concentration is CSn(mass%), an iron concentration is CFe(mass%), and a chromium concentration is CCr(mass%), following inequalities are satisfied: CSn≤1.2, 0.5≤CFe+CCr≤0.8, 0.26≤CFe/CCr≤1.7. COPYRIGHT: (C)2009,JPO&INPIT