公开(公告)号：WO2019045970A1

公开(公告)日：2019-03-07

申请号：PCT/US2018/045695

申请日：2018-08-08

Applicant: WESTINGHOUSE ELECTRIC COMPANY LLC

Inventor： LAHODA, Edward J. ,  BOYLAN, Frank A. ,  LAM, Ho Q. ,  NISSLEY, Mitchell E. ,  SCHNEIDER, Raymond E. ,  OELRICH, Robert L. ,  RAY, Sumit ,  POMIRLEANU, Radu ,  KAROUTAS, Zeses ,  HONE, Michael J.

IPC: G21C7/08 ,  C23C30/00

CPC classification number: G21C3/07 ,  G21C1/08 ,  G21C3/328 ,  G21C7/10 ,  G21C7/117 ,  G21C7/24 ,  G21C11/08

Abstract: A high temperature control rod (22) for a nuclear fuel assembly (10) is described herein that includes a neutron absorbing material (24) having a melting point greater than 1500 °C that does not form a eutectic with a melting point less than 1500 °C, and may further include a cladding material (30) having a melting point greater than 1500 °C. The cladding material (30) is selected from the group consisting of silicon carbide, zirconium, a zirconium alloy, tungsten, and molybdenum. The absorbing material (24) is selected from the group consisting of Gd 2 O 3 Ir B 4 C, Re, and Hf. The metal cladding (30) or the absorbing material (24) may be coated with an anti-oxidation coating (26) of Cr with or without a Nb intermediate layer (28).