In-situ dismantling of the liquid waste storage tank LV-1 in the JRTF; The Dismantling preparation work

Yokozuka, Yuta; Sunaoshi, Mizuho*; Fujikura, Toshiki; Suzuki, Shota; Muraguchi, Yoshinori; Handa, Yuichi; Mimura, Ryuji; Terunuma, Akihiro

JAEA-Technology 2020-017, 56 Pages, 2021/01

JAEA-Technology-2020-017.pdf:7.88MB

JAEA has dismantled equipment and instrument in the JAERI's Reprocessing Test Facility (JRTF) since 1996 as a part of its decommissioning. Starting in JFY 2007, in the annex building B which stored liquid waste generated in wet reprocessing tests, the liquid waste storage tank LV-1 installed in the LV-1 room of the first basement was dismantled with the in situ dismantling method. The dismantling preparation work is described in this report. Data on manpower, radiation control, and waste in the preparation work were collected, and its work efficiency was analyzed.

In-situ dismantling of the liquid waste storage tank LV-1 in JRTF, 7; Cutting of LV-1 tank

Mimura, Ryuji; Yokozuka, Yuta; Nemoto, Koichi; Shiraishi, Kunio

no journal, , 

no abstracts in English

Evaluation of the applicability of hydroxyapatite for a new disposable dosimeter using ESR

Kitamura, Yoshimasa; Oka, Toshitaka; Seito, Hajime*; Yokozuka, Eri*; Nagasawa, Naotsugu*; Kumagai, Yuta; Watanabe, Masayuki

no journal, , 

We attempt to fabricate a new disposable solid-state dosimeter capable of detecting the range from mGy to Gy as well as tooth enamel by applying ESR dosimetry technique. In this study, we evaluate the applicability of hydroxyapatite, which is the main component of teeth, to the new dosimeter. The intensity of carbonate radicals was proportional to absorbed dose and the dose-response curve showed a good linear relationship in the range 0-200 Gy, and the detection limit was estimated to be 100 mGy, slightly higher than that for human teeth.

In-situ dismantling of the liquid waste storage tank LV-1 in JRTF, 9; Cutting of water jacket and legs of the LV-1 tank

Yokozuka, Yuta; Mimura, Ryuji; Fujikura, Toshiki; Muraguchi, Yoshinori; Nemoto, Koichi; Shida, Shigeo

no journal, , 

no abstracts in English

None

Kitamura, Yoshimasa; Oka, Toshitaka; Seito, Hajime*; Yokozuka, Eri*; Nagasawa, Naotsugu*; Kumagai, Yuta; Watanabe, Masayuki

no journal, , 

no abstracts in English