Lessons learned / best practices on determination of decommissioned status; Operator's point of view

Nakamura, Hironobu; Kitao, Takahiko; Shimizu, Yasuyuki; Takeda, Seiichi; Yamaguchi, Katsuhiro*

no journal, , 

In order to determine the decommissioned status in the IAEA safeguards, JAEA attends the expert meeting held in IAEA to share the lessons learned and/or best practices. In the domestic examples, we can share a few examples in the decommissioning of experimental reactors, unfortunately, since there is no example in the bulk handling facilities (the facility which amount of nuclear material is determined by the measurement) such as reprocessing, MOX fabrication and centrifuge enrichment, based on the situation of nuclear material and dismantling of important process equipment (i.e. no reprocessing capability) in the decommissioning plan, after the confirmations that remaining nuclear materials is recovered and transferred to other facilities, and no process capability is established, are completed, it is concluded that it is necessary to terminate safeguards and nuclear material accountancy. In this report, we summarized the proposals as subjects such as change of material balance area or implementation of material balance evaluation by the decommissioning. we hope that the proposals is helped to determine the decommissioned status in the IAEA safeguards.