日本放射線安全管理学会誌
Online ISSN : 1884-9512
Print ISSN : 1347-1503
ISSN-L : 1347-1503
事例報告
RI 排水浄化槽の地下埋設式から地上据置式への改造工事について
阿部 利明馬田 敏幸河津 郁穂法村 俊之
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ジャーナル フリー

2010 年 9 巻 2 号 p. 147-153

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  We changed the purging tanks into the ground type from the underground type, because we could not check a leakage of radioactive wastewater from the underground purging tanks by visual inspection. At the drainage in our radioisotope facility, the wall of underground purging tanks were reused as a protective wall in leakage of radioactive wastewater, and new purging tanks were built in the place among the protective wall. The new tanks are made of stainless steel, and its surface condition can be checked by visual inspection. The process of the construction was divided into the three terms since the radioisotope facility couldn't be closed during the construction. The kinds and quantities of radioisotopes which can be used in our radioisotope facility were reduced because the treatment capacity of the drainage was decreased during the construction. We made efforts especially to prevent a radiation accident during the construction. As the result, it is realized again that a person of radiation control duties plays an important role to prevent the accident when a contamination test or trial run of the system are conducted, heavy things are being carried, or the underground purging tanks are being dismantled.

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