US 11,862,352 B2
Channel box and fuel assembly
Toshiki Nishimura, Kawasaki (JP); Satoko Tajima, Yokohama (JP); Megumi Akimoto, Ota (JP); Shoko Suyama, Kawasaki (JP); and Masaru Ukai, Yokohama (JP)
Assigned to KABUSHIKI KAISHA TOSHIBA, Tokyo (JP); and TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATION, Kawasaki (JP)
Filed by KABUSHIKI KAISHA TOSHIBA, Tokyo (JP); and TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATION, Kawasaki (JP)
Filed on Feb. 2, 2022, as Appl. No. 17/590,946.
Claims priority of application No. 2021-044742 (JP), filed on Mar. 18, 2021.
Prior Publication US 2022/0301730 A1, Sep. 22, 2022
Int. Cl. G21C 1/32 (2006.01); G21C 3/324 (2006.01); G21C 3/322 (2006.01)
CPC G21C 3/324 (2013.01) [G21C 3/322 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A channel box, comprising:
an elongated portion which extends from one of two ends of the channel box in a longitudinal direction to the other of the two ends of the channel box, wherein
the elongated portion is hollow so as to accommodate a plurality of nuclear reactor fuel rods,
the elongated portion is divided from the one of the two ends to the other of the two ends in the longitudinal direction into at least three areas,
each of the at least three areas (1) abuts a first other area of the at least three areas and (2) abuts a second other area of the at least three areas or one of the two ends of the channel box,
the elongated portion has layers including a silicon carbide composite material having a silicon carbide fiber,
a content of the silicon carbide fiber in the silicon carbide composite material used in each of the at least three areas is different from one another, and
the content of the silicon carbide fiber in the silicon carbide composite material used in each of the at least three areas is consistent within the entirety of the respective area.