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

WIPO Patent Application WO/2023/166834

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: an accommodating vessel which is disposed above reactor core fuel that is stored in a hermetically sealed state in a nuclear reactor vessel, accommodates a plurality of neutron absorbers, and has an opening in a bottom portion through which the neutron absorbers can pass; a shielded passage which extends in a vertical direction between the reactor core fuel, and which has an upper end that communicates with the opening of the accommodating vessel and a lower end that is closed; and a communicating portion which is disposed so as to block the opening, and which provides communication between the accommodating vessel and the shielded passage if a threshold temperature is reached or exceeded.

JPS6420493

BORIC ACID WATER INJECTING DEVICE

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/JP2022/047997

September 07, 2023

December 26, 2022

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MITSUBISHI HEAVY IND LTD (JP)

G21C9/02; G21C7/22

JPS63184095A	1988-07-29
JP2019531472A	2019-10-31
JPS6247585A	1987-03-02
JPH07209468A	1995-08-11
JPS54139198U	1979-09-27
JPS56150392A	1981-11-20

SAKAI INTERNATIONAL PATENT OFFICE (JP)

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