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Title:
METHOD FOR DISMANTLING NUCLEAR REACTOR CONTAINMENT VESSEL AND BIOLOGICAL SHIELDING WALL
Document Type and Number:
WIPO Patent Application WO/2019/208062
Kind Code:
A1
Abstract:
This method for dismantling a nuclear reactor containment vessel and a biological shielding wall avoids work at height and has improved work safety. In the present invention, said method is characterised by comprising: a BSW dismantling step in which the biological shielding wall (11) is dismantled from each floor side of a nuclear reactor building (10) from which a reactor-internal structure (15), a nuclear reactor pressure vessel (14) and a thermal shielding wall (16) have been dismantled; and a PCV dismantling step in which the nuclear reactor containment vessel (12) is dismantled from each floor side from which the biological shielding wall (11) has been dismantled.

Inventors:
NAGAE Yoshiaki (1-3, Higashi-Ikebukuro 3-chome, Toshima-k, Tokyo 30, 〒1708630, JP)
KONOO Kenji (1-3, Higashi-Ikebukuro 3-chome, Toshima-k, Tokyo 30, 〒1708630, JP)
IIZUKA Tatsuya (1-3, Higashi-Ikebukuro 3-chome, Toshima-k, Tokyo 30, 〒1708630, JP)
SHIMIZU Tokuo (1-3, Higashi-Ikebukuro 3-chome, Toshima-k, Tokyo 30, 〒1708630, JP)
MORI Yukio (1-3, Higashi-Ikebukuro 3-chome, Toshima-k, Tokyo 30, 〒1708630, JP)
TAHATA Junya (1-1 Saiwai-cho 3-chome, Hitachi-sh, Ibaraki 73, 〒3170073, JP)
KITAHARA Takashi (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
Application Number:
JP2019/012556
Publication Date:
October 31, 2019
Filing Date:
March 25, 2019
Export Citation:
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Assignee:
HITACHI PLANT CONSTRUCTION, LTD. (1-3 Higashi-Ikebukuro 3-chome, Toshima-ku Tokyo, 30, 〒1708630, JP)
HITACHI-GE NUCLEAR ENERGY, LTD. (1-1 Saiwai-cho 3-chome, Hitachi-shi Ibaraki, 73, 〒3170073, JP)
International Classes:
G21F9/30
Foreign References:
JP2014098570A2014-05-29
JP2012230084A2012-11-22
JPH04158297A1992-06-01
JP2005083923A2005-03-31
JPS56111764A1981-09-03
JPH0194164A1989-04-12
Other References:
SEIKI, YOSHIHIRO ET AL.: "JPDR dismantling project - JPDR facilities and dismantling of equipment", JOURNAL OF THE RANDEC, 15 December 1996 (1996-12-15), pages 12 - 23
MITSUI, HIDEHIKO: "Current status and issues of decommissioning technology III, Systems engineering", JOURNAL OF THE ATOMIC ENERGY SOCIETY OF JAPAN, vol. 33, no. 5, 1991, pages 415 - 418
Attorney, Agent or Firm:
MURAKAMI Tomokazu et al. (3rd Floor, Nakagawa Bldg. 23-13, Higashi-Ikebukuro 4-chome, Toshima-k, Tokyo 13, 〒1700013, JP)
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