Kabushiki Kaisha Toshiba

Goro Yanase

Kouji Hiraiwa

Rei Kimura

Shungo Sakurai

Rie Aizawa

Mitsuharu Nakamura

Shinichi Ishizato

Kazuhiro Kawagoe

Shinichiro Kawamura

Norimitsu Komai

Tsukasa Suwazono

Yoshikazu Ui

Yutaka Sosa

A method of producing a light water reactor fuel assembly may include: setting conditions at least concerning an operation cycle period and burnup; setting an initial enrichment of enriched uranium; calculating excess reactivity of a light water reactor core where light water reactor fuel assemblies including the enriched uranium are burned until an end stage of a final operation cycle; determining whether a condition where excess reactivity at an end of a first operation cycle in the burnup calculation step is close to a predetermined positive value is true or not; and returning to the setting of the initial enrichment, when it is determined at the determining that the situation is not true, or deciding an enrichment of the enriched uranium when it is determined that the situation is true.

Light water reactor fuel assembly, light water reactor core and MOX fuel assembly production method

A control rod position detector including a permanent magnet that is attached on a control rod inserted in a reactor pressure vessel, where the permanent magnet is capable of moving together with the control rod, and a plurality of reed switch mechanisms that are arranged in the reactor pressure vessel at regular intervals in an insertion direction of the control rod. Each of the reed switch mechanisms is provided with a pair of reed switches that are placed so as to overlap with each other in the insertion direction of the control rod. The pair of reed switches are connected to a common wiring. The common wiring is connected to a detector that detects a position of the control rod based on signals from the reed switches.

Control rod position detector

Growing community of inventors

Yokohama, Japan

Goro Yanase