公开(公告)号：US20170330638A1

公开(公告)日：2017-11-16

申请号：US15529663

申请日：2014-11-26

申请人： HITACHI, LTD.

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

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

CPC分类号： 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

摘要： 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.

公开(公告)号：US20150318062A1

公开(公告)日：2015-11-05

申请号：US14646223

申请日：2012-11-21

申请人： HITACHI, LTD.

发明人： Ryou ISHIBASHI ,  Takashi NAITOU ,  Motomune KODAMA ,  Takuya AOYAGI ,  Tetsushi HINO ,  Motoo AOYAMA ,  Tsuneyuki HASHIMOTO ,  Katsuhito TAKAHASHI ,  Junichi SAKANO ,  Hiroshi NAKANO

IPC分类号： G21C3/34 ,  H05K7/20 ,  G21C3/20 ,  G21C3/07 ,  H05K1/03 ,  H05K1/18

CPC分类号： G21C3/34 ,  C03C8/14 ,  C03C8/18 ,  C03C8/24 ,  C04B37/025 ,  C04B2237/10 ,  C04B2237/365 ,  C04B2237/38 ,  C04B2237/403 ,  C04B2237/405 ,  C04B2237/407 ,  C04B2237/765 ,  C04B2237/84 ,  F28D7/16 ,  F28F19/02 ,  F28F21/006 ,  F28F21/04 ,  F28F2255/06 ,  G21C3/07 ,  G21C3/20 ,  H01L23/15 ,  H01L23/3735 ,  H01L23/473 ,  H01L2224/32225 ,  H01L2224/48091 ,  H01L2224/48227 ,  H01L2224/48472 ,  H01L2224/49109 ,  H01L2224/73265 ,  H01L2924/1305 ,  H01L2924/13055 ,  H01L2924/181 ,  H05K1/0306 ,  H05K1/18 ,  H05K7/20509 ,  Y02E30/40 ,  H01L2924/00014 ,  H01L2924/00 ,  H01L2924/00012

摘要： Provided is a structure including a first member (2); a second member (3) disposed opposite to the first member (2); and a glass layer (4) disposed between the first member (2) and the second member (3) so as to bond the first member (2) and the second member (3). A glass transition point of the glass layer (4) is lower than a temperature of the glass layer (4) under operation. In the glass layer (4), at least either of ceramic and metallic particles 4b, 4c is dispersed. In a temperature region lower than the glass transition point of the glass layer (4), a thermal expansion coefficient thereof falls in between thermal expansion coefficients of the first member (2) and the second member (3). This allows thermal strain caused within the structure (1) to be reduced when the structure (1) is operated at a higher temperature than a room temperature.

摘要翻译： 提供包括第一构件（2）的结构; 与所述第一构件（2）相对设置的第二构件（3）; 以及设置在所述第一构件（2）和所述第二构件（3）之间以便结合所述第一构件（2）和所述第二构件（3）的玻璃层（4）。 玻璃层（4）的玻璃化转变点低于在使用中的玻璃层（4）的温度。 在玻璃层（4）中，陶瓷和金属颗粒4b，4c中的至少任一个被分散。 在比玻璃层（4）的玻璃化转变点低的温度区域中，其热膨胀系数落在第一部件（2）和第二部件（3）的热膨胀系数之间。 这使得当结构（1）在比室温更高的温度下操作时，允许在结构（1）内引起的热应变减小。

公开(公告)号：US20170301414A1

公开(公告)日：2017-10-19

申请号：US15511663

申请日：2015-08-25

申请人： Hitachi, Ltd.

发明人： Ryou ISHIBASHI ,  Yoshiyuki TAKAMORI ,  Xudong ZHANG

IPC分类号： G21C3/10 ,  G21C3/07

CPC分类号： G21C3/10 ,  G21C3/06 ,  G21C3/07 ,  G21C3/30 ,  G21C21/02 ,  Y02E30/40

摘要： Provided herein is a fuel rod and a fuel assembly for light water reactors in which crack penetration to a fuel cladding tube or an end plug can be prevented even when cracking occurs at the joint between the fuel cladding tube and the end plug for which a ceramic base material is used. A fuel rod 10a for light water reactors includes: a cylindrical cladding tube 11 formed of a ceramic base material; a connection 21 formed of the same or similar material to the cladding tube 11; and an end plug 12a having a concave portion 12f of a continuously curved surface shape adapted to house the connection 21. The end plug 12a is formed of the same or similar material to the cladding tube 11. A slanted surface 11a formed at an end portion of the cladding tube 11, and a slanted surface 12d formed at an end portion of the end plug 12a are joined in contact with each other with a metallic joint material 20. The joint is supported by the connection 21.