Radiation protection feature and research at Tokai reprocessing plant

Momose, Takumaro  ; Endo, Kuniaki ; Ito, Yasuhisa; Yamashita, Tomoyuki; Namiki, Atsushi ; Sanada, Yukihisa   ; Akiyama, Kiyomitsu; Takeishi, Minoru ; Tago, Itaru ; Furuta, Sadaaki

The first reprocessing pilot plant in Japan (Tokai Reprocessing Plant; TRP) has been operated since 1977 at Nuclear Fuel Cycle Engineering Laboratories, JAEA. General radiation protection in TRP is performed with continuous monitoring and sampling methods. The continuous monitors measuring -ray, neutron, particulate alpha and beta nuclides in the air are installed in the radiation controlled area as a central monitoring system to prevent from unnecessary exposure. Air and water effluents from the TRP are also monitored by continuous monitors or sampling methods to comply with regulations. In addition to this, environmental monitoring has been carried out to assess influences on public and environment by the plant operation. A feature of radiation protection and its recent relevant researches at TRP will be introduced in this presentation.