Development of safety assessment code for decommissioning of nuclear cycle facilities

Mukai, Masayuki ; Shimada, Taro ; Tanaka, Tadao ; Sukegawa, Takenori; Nakayama, Shinichi 

A code for evaluation of exposed doses for public and workers by decommissioning of nuclear cycle facilities was developed based on DecDose code which was developed by JAEA and intended to assess safety of decommissioning for atomic power reactors. We discussed on characteristic aspects particular to the nuclear cycle facilities and improved DecDose on the subject of operation process, target nuclides, and exposure pathways. Evaluation result by the developed code applied on a trial basis to uranium-enrichment factory was reasonably reflected the particular aspects of the nuclear cycle facilities in exposure doses.