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Journal Articles

Improving the safety of the power supply system by separating the power supply circuit for control in the power distribution board in Tokai Reprocessing Plant

Goto, Sho; Aoki, Kenji; Morimoto, Kenji; Tsuboi, Masatoshi; Isozaki, Naohiko; Furukawa, Ryuichi; Kitagawa, Osamu; Fukaya, Yasuhiro*

Nihon Hozen Gakkai Dai-17-Kai Gakujutsu Koenkai Yoshishu, p.517 - 520, 2021/07

no abstracts in English

Journal Articles

Dose reduction measure in exchange work of valves used for agitation of highly active liquid waste in storage tank

Isozaki, Naohiko; Morimoto, Kenji; Furukawa, Ryuichi; Tsuboi, Masatoshi; Yada, Yuji; Miyoshi, Ryuta; Uchida, Toyomi; Ikezawa, Kazumi*; Kurosawa, Kenji*

Nihon Hozen Gakkai Dai-16-Kai Gakujutsu Koenkai Yoshishu, p.225 - 228, 2019/07

Highly active liquid waste, which is generated by the reprocessing of spent nuclear fuel, is stored in storage tank of Tokai Reprocessing Plant until it is vitrified. The waste solution in the tank is periodically agitated to avoid the precipitation of insoluble residues during the storage. Three way valves and ball valves have been located at the tank for agitation. Radiation dose rate at the valve location is high and operator's radiation exposure become a problem. Therefore, measures to reduce radiation exposure are performed and reported in this presentation.

Oral presentation

Development of three way valve using bellows seal for pulsation in vessels of high active waste solution

Morimoto, Kenji; Isozaki, Naohiko; Yasuo, Kiyoshi

no journal, , 

no abstracts in English

Oral presentation

Development of three way valve using bellows seal for pulsation in vessels of high active wastesoiution

Omori, Kazuki; Morimoto, Kenji; Isozaki, Naohiko

no journal, , 

no abstracts in English

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