NUCLEAR REACTOR SHUT-DOWN SYSTEM AND NUCLEAR REACTOR SHUT-DOWN METHOD

WIPO Patent Application WO/2023/166985

A1

Provided are a nuclear reactor shut-down system and a nuclear reactor shut-down method for emergency shut-down, the system and method being applicable to small nuclear reactors while maintaining safety and rapidity. This nuclear reactor shut-down system comprises: a shielded passage which passes between reactor core fuel stored in a hermetically sealed state in a nuclear reactor vessel, and which has one end portion open and another end portion closed; a neutron absorber capable of entering from the opening of the shielded passage; a resilient member which urges the neutron absorber from the opening of the shielded passage in a direction entering the interior thereof by being released from a compressed state; and a braking unit which is disposed so as to maintain the compressed state of the resilient member and which releases the compressed state of the resilient member if a threshold temperature is reached or exceeded.

OTSUKI SHOHEI (JP)
KAMOHARA SATORU (JP)
YODO TADAKATSU (JP)
KOBAYASHI SHOTA (JP)
MURAKAMI NOZOMU (JP)
NAKAZATO WATARU (JP)
SANO KEISUKE (JP)
FUJIWARA DAISUKE (JP)
SUGIURA HIROKAZU (JP)
TANAKA YUTAKA (JP)
ISHIGURO TATSUO (JP)
NOGUCHI HIRONORI (JP)
TOKAIRIN TSUYOSHI (JP)
KARATO TAKANORI (JP)
MIYAMOTO TAKAHIRO (JP)

PCT/JP2023/005137

September 07, 2023

February 15, 2023

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MITSUBISHI HEAVY IND LTD (JP)

G21C7/14; G21C9/027

JP2015500463A	2015-01-05
JP2020165836A	2020-10-08
JPH11166992A	1999-06-22

SAKAI INTERNATIONAL PATENT OFFICE (JP)

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