Risk-informed applications for the purpose of optimized decision making in safety related activities, including safety design and operational management of nuclear power plants, can be widely adopted by regulators, manufacturers as well as utilities. Utilization of risk information is expected to contribute to the achievement of safety improvement in operating nuclear power plants in an optimized way. In addition, effective utilization of risk information is essential to cope with the changes in safety related activities reflecting the latest experiences and findings for the continuous improvement of the safety of nuclear power plants into the future.

In this regard, the Standards Committee of the Atomic Energy Society of Japan is working on the establishment of the new standard specifying the basic requirements regarding risk-informed decision making (hereafter, called “RIDM”). This paper introduces the policies toward the establishment of the RIDM Standard.

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