Kabushiki Kaisha Toshiba

Ken Okuda

Masanobu Watanabe

Ken Uchida

Hajime Mori

Noboru Saito

Kunihiko Kinugasa

Shigeru Kasai

Tsuyoshi Hagiwara

Takeshi Maehara

Satoru Abe

Yuusuke Watanabe

Hisaki Sato

Chikako Iwaki

Tetsuzo Yamamoto

Kiyofumi Saiki

Tatsumi Ikeda

Kiichi Ito

Hideshi Iwasa

The pressurized water reactor according an embodiment comprises: a cylindrical reactor pressure vessel () to which inlet nozzles are connected; fuel assemblies which are contained within the reactor pressure vessel (); a cylindrical reactor core barrel () which surrounds the fuel assemblies and forms an annular downcomer () between the reactor core barrel () and the inner surface of the reactor pressure vessel (); and radial supports. The radial supports are supports which are arranged below the downcomer () at intervals in the circumferential direction, each has vertical flow path formed therein, and position the reactor core barrel () and the reactor pressure vessel (). The radial supports each has, for example, a flow path-equipped radial keys () and a key groove member ().

Pressurized water reactor

A reactor metering pipe fixing device fixes a reactor metering pipe disposed in a reactor to a cylindrical outer surface of a jet pump diffuser and reduces stress that may be induced in a weld zone in the reactor metering pipe. An outer holding memberis held on the cylindrical outer surfaceof a jet pump diffuserby a C-shaped holding member. The reactor metering pipeis clamped from radial directions by the outer holding memberand inner holding membersand. Wedgesandare wedged into a gap between the cylindrical outer surfaceand the inner holding memberand a gap between the cylindrical outer surfaceand the inner holding memberto fix the reactor metering pipefirmly to the cylindrical outer surface

Device and method for fixing a reactor metering pipe

Growing community of inventors

Kanagawa, Japan

Ken Okuda