Rabin & Berdo, P.C.
Method of manufacturing a corrosion-resistant zirconium alloy for a nuclear fuel cladding tube
A method of manufacturing a zirconium alloy for a nuclear fuel cladding tube includes melting a mixture of 0.5 wt % of Nb, 0.4 wt % of Mo, 0.1 to 0.15 wt % of Cu, 0.15 to 0.2 wt % of Fe, and a balance of zirconium to prepare a melted ingot; heat treating the melted ingot at 1,000 to 1,050° C. for 30 to 40 min. followed by quenching in water to prepare a heat-treated ingot; preheating the heat-treated ingot at 630 to 650° C. for 20 to 30 min. to prepare a preheated ingot followed by hot rolling the preheated ingot at a reduction ratio of 60 to 65% to provide a hot-rolled material; thrice performing vacuum annealing followed by cold-rolling; and vacuum annealing a third cold-rolled material in a final vacuum annealing at 510 to 520° C. for 7 to 9 hrs. to provide the zirconium alloy as a cold-rolled material.
KEPCO NUCLEAR FUEL CO., LTD.
B G Y C B G C
B22D G21C Y02E C22F B22D G21C C22C
inventional inventional additional inventional inventional inventional inventional
Hun Chung Yong Sung Yong Dae Gyun Min Young Tae Sik Seung Jae Jae Ik Yeon Soo Yoon Ho Yong Kyoon
Jang Lee Lee Go Choi Jung Lee Kim Na Kim Mok