Sampling of radioactive materials remaining in JMTR Reactor Facility

Ouchi, Takuya; Nagata, Hiroshi ; Shinoda, Yuya; Yoshida, Hayato; Inoue, Shuichi ; Chinone, Marina ; Abe, Kazuyuki; Ide, Hiroshi  ; Watahiki, Shunsuke

In the future, radioactive waste which generated from nuclear research facilities in Japan Atomic Energy Agency are planning to be buried for the near surface disposal. It is necessary to establish the method to evaluate the radioactivity concentrations of the radioactive wastes. Therefore, at the Oarai Nuclear Engineering Institute, in order to contribute to the study of methods for evaluating radioactivity concentrations of the radioactive wastes from nuclear research facilities, samples were taken from radioactive waste that are expected to be buried in the future and radiochemical analysis is used to obtain data on the radioactivity concentration of each nuclide contained in the radioactive waste. This report presents the concept of selecting sample collection targets and summarizes the sampling of radioactive materials conducted at the JMTR reactor facility in fiscal years 2023 and 2024 to obtain data on radioactivity concentrations.