On 13-17 May 2019, a training workshop on the applicability of regulatory requirements in implementing risk-informed approaches to maintenance optimization at NPPs was held in the Brookhaven National Laboratory (BNL) in Upton (USA) as a part of the Ukrainian Technical Assistance Program of the U.S. Department of Energy.
The training workshop was aimed at familiarization of experts of the State Nuclear Regulatory Inspectorate (SNRIU) and State Scientific and Technical Center for Nuclear and Radiation Safety (SSTC NRS) with requirements and experience of the USA on implementing risk-informed decision-making for safety purposes, in particular on equipment maintenance optimization, getting skills of their practical application.
During the training sessions, the participants discussed the most important aspects and specific issues requiring peculiar attention with regard to the regulation of activities on applying risk-informed approaches to maintenance optimization. The basic regulatory requirements of the USA for the conduct and scope of maintenance were considered together with important details in the regulatory and branch guidelines.
Besides, BNL experts presented the U.S. experience in the implementation and continuous improvement of methods for analyzing maintenance efficiency using risk-informed approaches. In particular, the attention was focused on the advantages and disadvantages of using such methods.
Anastasia Ilina, Junior Researcher of NPP Thermohydraulic and Probabilistic Safety Analysis Department of the SSTC NRS, stated that information and knowledge obtained during the training workshop will be further used for efficient review of Energoatom documents on the implementation of risk-informed approaches to NPP maintenance optimization, in particular regarding the pilot project at ZNPP-2 that is being implemented with the support of the U.S. Department of Energy.*
The project “Maintenance Optimization Program for Systems Important to Safety Using Plant Configuration Risk Management” is being successfully implemented at Zaporizhzhya NPP Unit 2 with the support of the U.S. Department of Energy and the Argonne National Laboratory. The Energoatom, SSTC NRS and ZNPP (on the basis of which the project is being implemented) are the project participants.