公开(公告)号：US20170330638A1

公开(公告)日：2017-11-16

申请号：US15529663

申请日：2014-11-26

Applicant: HITACHI, LTD.

Inventor： Ryou ISHIBASHI ,  Kinya AOTA ,  Xudong ZHANG ,  Hideki KITA ,  Seiji YAMASHITA

IPC: G21C3/322 ,  G21C15/243 ,  G21C5/12

CPC classification number: G21C3/322 ,  B23K1/0008 ,  B23K1/18 ,  B23K1/19 ,  B23K20/026 ,  B23K20/16 ,  B23K20/233 ,  B23K2101/06 ,  B23K2103/52 ,  C04B37/006 ,  C04B2235/9607 ,  C04B2235/9669 ,  C04B2237/083 ,  C04B2237/122 ,  C04B2237/126 ,  C04B2237/127 ,  C04B2237/16 ,  C04B2237/365 ,  C04B2237/38 ,  C04B2237/708 ,  C04B2237/72 ,  C04B2237/765 ,  C04B2237/84 ,  G21C3/07 ,  G21C3/10 ,  G21C3/326 ,  G21C5/126 ,  G21C15/243 ,  G21C21/02 ,  Y02E30/40

Abstract: A nuclear reactor fuel rod is a fuel rod for a light-water reactor. The nuclear reactor fuel rod includes a fuel cladding tube and an end plug, both of which are formed of a silicon carbide material. A bonding portion between the fuel cladding tube and the end plug is formed by brazing with a predetermined metal bonding material interposed, and/or by diffusion bonding. The predetermined metal bonding material has a solidus temperature of 1200° C. or higher. An outer surface of the bonding portion, and a portion of an outer surface of the fuel cladding tube and the end plug, which is adjacent to the outer surface of the bonding portion are covered by bonding-portion coating formed of a predetermined coating metal. The predetermined metal bonding material and the predetermined coating metal have an average linear expansion coefficient which is less than 10 ppm/K.