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JAEA Reports

Soundness survey of cooling tower of Utility Cooling Loop (UCL Cooling Tower) in JMTR

Oto, Tsutomu; Asano, Norikazu; Kawamata, Takanori; Yanai, Tomohiro; Nishimura, Arashi; Araki, Daisuke; Otsuka, Kaoru; Takabe, Yugo; Otsuka, Noriaki; Kojima, Keidai; et al.

JAEA-Review 2020-018, 66 Pages, 2020/11

JAEA-Review-2020-018.pdf:8.87MB

A collapse event of the cooling tower of secondary cooling system in the JMTR (Japan Materials Testing Reactor) was caused by the strong wind of Typhoon No.15 on September 9, 2019. The cause of the collapse of the cooling tower was investigated and analyzed. As the result, it was identified that four causes occurred in combination. Thus, the soundness of the cooling tower of Utility Cooling Loop (UCL cooling tower), which is a wooden cooling tower installed at the same period as the cooling tower of secondary cooling system, was investigated. The items of soundness survey are to grasp the operation conditions of the UCL cooling tower, to confirm the degradation of structural materials, the inspection items and inspection status of the UCL cooling tower, and to investigate the past meteorological data. As the results of soundness survey of the UCL cooling tower, the improvement of inspection items of the UCL cooling tower was carried out and the replacement and repair of the structural materials of the UCL cooling tower were planned for safe maintenance and management of this facility. And the renewal plan of new cooling tower was created to replace the existing UCL cooling tower. This report is summarized the soundness survey of the UCL cooling tower.

Journal Articles

Integrity check of Tokai Reprocessing Plant after the Tohoku Region Pacific Coast Earthquake

Nakano, Takafumi; Sato, Fuminori; Shirozu, Hidetomo; Nakanishi, Ryuji; Fukuda, Kazuhito; Tachibana, Ikuya

Nihon Genshiryoku Gakkai-Shi ATOMO$$Sigma$$, 57(1), p.14 - 20, 2015/01

no abstracts in English

Journal Articles

None

Yamazaki, Toshihiko; Uryu, Mitsuru; Nakanishi, Ryuji; Kawai, Nobuyasu*; Hashimura, Hirohiko*

Nihon Kenchiku Gakkai 2005-Nendo Taikai Gakujutsu Koen Kogaishu, p.847 - 848, 2005/09

None

Journal Articles

None

Nakanishi, Ryuji; Uryu, Mitsuru; Yamazaki, Toshihiko

Nihon Kenchiku Gakkai 2005-Nendo Taikai Gakujutsu Koen Kogaishu, p.757 - 758, 2005/09

None

Oral presentation

Characteristics of long period ground motions due to subsurface underground structure in Ibaraki coastal area, 3

Nakanishi, Ryuji; Yamazaki, Toshihiko; Uryu, Mitsuru; Nagano, Masayuki*; Takemura, Masayuki*

no journal, , 

no abstracts in English

Oral presentation

Characteristics of long period ground motions due to subsurface underground structure in Ibaraki coastal area, 4

Nagano, Masayuki*; Takemura, Masayuki*; Uryu, Mitsuru; Yamazaki, Toshihiko; Nakanishi, Ryuji

no journal, , 

no abstracts in English

Oral presentation

Fragility evaluation of base-isolated building, 1; Seismic response analysis considering bumping against retaining wall

Nakanishi, Ryuji; Yamazaki, Toshihiko; Uryu, Mitsuru; Endo, Manabu*; Imazuka, Yoshikatsu*; Yoshida, Shinichi*

no journal, , 

no abstracts in English

Oral presentation

Fragility evaluation of base-isolated building, 2; Evaluation of fragility curve considering bumping against retaining wall

Nakanishi, Ryuji; Yamazaki, Toshihiko; Uryu, Mitsuru; Endo, Manabu*; Imazuka, Yoshikatsu*; Yoshida, Shinichi*

no journal, , 

no abstracts in English

Oral presentation

Natural frequency transition of a base-isolated building during earthquake

Kirita, Fumio; Uryu, Mitsuru; Yamazaki, Toshihiko; Nakanishi, Ryuji

no journal, , 

no abstracts in English

Oral presentation

Amplitude dependence of natural frequency on a base-isolated building during earthquake

Kirita, Fumio; Uryu, Mitsuru; Yamazaki, Toshihiko; Nakanishi, Ryuji

no journal, , 

no abstracts in English

Oral presentation

Natural frequency transition of a base-isolated building during the 2011 off the Pacific coast of Tohoku earthquake

Kirita, Fumio; Uryu, Mitsuru; Yamazaki, Toshihiko; Hashimura, Hirohiko; Nakanishi, Ryuji; Kojima, Keidai

no journal, , 

no abstracts in English

Oral presentation

A Study on the response characteristics of base-isolated structures for earthquake motion, 2

Nakanishi, Ryuji; Uryu, Mitsuru; Yamazaki, Toshihiko; Hashimura, Hirohiko; Kirita, Fumio; Kojima, Keidai

no journal, , 

no abstracts in English

Oral presentation

A Study on the response characteristics of base-isolated structures for earthquake motion, 1

Hashimura, Hirohiko; Uryu, Mitsuru; Yamazaki, Toshihiko; Nakanishi, Ryuji; Kirita, Fumio; Kojima, Keidai

no journal, , 

no abstracts in English

Oral presentation

Long-term evaluation of natural frequency of a base-isolated building before and after the 2011 off the Pacific coast of Tohoku earthquake

Kirita, Fumio; Uryu, Mitsuru; Yamazaki, Toshihiko; Hashimura, Hirohiko; Nakanishi, Ryuji; Kojima, Keidai

no journal, , 

no abstracts in English

Oral presentation

Treatment test of decontamination wastes using a pilot-scale pyrolysis furnace, 3; Heat-treatment test of paddy soil in Iitate-village

Osugi, Takeshi; Nakashio, Nobuyuki; Mimura, Ryuji; Nonaka, Kazuharu; Nakanishi, Yoshiki; Okoshi, Minoru; Tokizawa, Takayuki; Nakayama, Shinichi; Kimura, Takeshi*

no journal, , 

To reduce volume of wastes that consisted of plants and soil generated from decontamination works on farmland, we have produced a pilot-scale pyrolysis furnace by rotary kiln type and had some heat-treatment tests. In this reports, we shows some results of the tests on two kinds of paddy soils in Iitate-village.

Oral presentation

Performance evaluation of lead dampers on base-isolated building attacked by the 2011 off the Pacific coast of Tohoku earthquake, 1

Hashimura, Hirohiko; Uryu, Mitsuru; Yamazaki, Toshihiko; Nakanishi, Ryuji; Kirita, Fumio; Kojima, Keidai

no journal, , 

no abstracts in English

Oral presentation

Performance evaluation of lead dampers on base-isolated building attacked by the 2011 off the Pacific coast of Tohoku earthquake, 2

Kirita, Fumio; Uryu, Mitsuru; Yamazaki, Toshihiko; Hashimura, Hirohiko; Nakanishi, Ryuji; Kojima, Keidai

no journal, , 

no abstracts in English

Oral presentation

Performance evaluation of lead dampers on base-isolated building attacked by the 2011 off the Pacific coast of Tohoku earthquake, 3

Kojima, Keidai; Uryu, Mitsuru; Yamazaki, Toshihiko; Hashimura, Hirohiko; Nakanishi, Ryuji; Kirita, Fumio

no journal, , 

no abstracts in English

Oral presentation

Performance evaluation of lead dampers on base-isolated building attacked by the 2011 off the Pacific coast of Tohoku earthquake, 4

Nakanishi, Ryuji; Uryu, Mitsuru; Yamazaki, Toshihiko; Hashimura, Hirohiko; Kirita, Fumio; Kojima, Keidai

no journal, , 

no abstracts in English

Oral presentation

Performance evaluation of lead dampers on base-isolated building attacked by the 2011 off the Pacific coast of Tohoku earthquake, 5

Uryu, Mitsuru; Kirita, Fumio; Yamazaki, Toshihiko; Hashimura, Hirohiko; Nakanishi, Ryuji; Kojima, Keidai

no journal, , 

no abstracts in English

26 (Records 1-20 displayed on this page)