Decommissioning report for Wastewater Treatment Facility (Part 2); Chapter on contamination inspection section

Yamamoto, Keisuke; Nakagawa, Takuya; Shimojo, Hiroto; Kijima, Jun; Miura, Daiya; Onose, Yoshihiko*; Namba, Koji*; Uchida, Hiroaki*; Sakamoto, Kazuhiko*; Ono, Chika*; Kato, Teruo*; Sakurai, Tetsuya*; Fujita, Naoto*; Onuki, Takatoshi*; Takenaka, Yuma*; Watabe, Masaharu*; Kashimura, Mamoru*; Futagawa, Kenji*; Ouchi, Masahito*; Todori, Yasuhiro*; Omori, Tomohiro*; Ishikawa, Masato*; Shirato, Toshikazu*; Hagishima, Yusuke*; Otsu, Noa*; Matsuo, Kazuomi; Suguro, Toshiyasu

The uranium enrichment facilities at the Nuclear Fuel Cycle Engineering Laboratories of Japan Atomic Energy Agency (JAEA) were constructed sequentially to develop uranium enrichment technology with centrifugal separation method. The developed technologies were transferred to Japan Nuclear Fuel Limited until 2001. And the original purpose has been achieved. Wastewater Treatment Facility, one of the uranium enrichment facilities, was constructed in 1976 to treat radioactive liquid waste generated at the facilities, and it finished the role in 2008. In accordance with the Medium/Long-Term Management Plan of JAEA Facilities, interior equipment installed in this facility had been dismantled and removed since November 2021 to August 2023. This report summarizes the findings obtained through the work related to the contamination inspection methods cancellation the controlled area of Wastewater Treatment Facility from September 2023 to March 2024.