А. О. Ostapovets, V. I. Konshin
National Technical University of Ukraine “Ihor Sikorsky Kyiv Polytechnic Institute”, 37, Beresteiskyi Ave, Kyiv, 03056, Ukraine
DOI: doi.org/10.31717/2311-8253.24.1.1
Abstract
The current state of nuclear energy in Ukraine is considered. It was determined that the most acceptable method of increasing the efficiency of nuclear power plants is to reduce the duration of repairs. The analysis of methods of optimization of maintenance and repairs was carried out. An analysis of the experience of using risk-informed approaches to maintenance and repairs in the world was performed. In particular, in such countries as Bulgaria, the Czech Republic, and the USA. General approaches to the process of risk-informed management of the configuration of the NPP power unit are considered. The experience of applying risk-informed configuration management in the USA is analyzed in more detail. The current state of measures to implement the optimization of technical maintenance and repairs at JSC NNEGC “Energoatom” was considered. An analysis of compliance with the process of optimization of maintenance and repairs with the national regulatory base on nuclear and radiation safety was performed. The results of the analysis of the existing approaches of JSC NNEGC “Energoatom” to the planning of technical maintenance and repairs and the development of schedules for periodic repairs are also given. The results of a comparative analysis of national regulatory documents with regulatory and technical documents of the United States, as well as with international documents of the IAEA and WENRA are given. Several inconsistencies in terms of regulatory requirements have been identified, which must either be eliminated or properly substantiated for the possibility of implementing risk-informed approaches to maintenance and repairs. A comparative analysis of the safety criteria used in the optimization of maintenance and repairs at the US nuclear power plants was performed. The acceptability criteria that a risk-informed decision must meet and the procedure for substantiating compliance with the acceptability criteria have been analyzed.
Keywords: operation of NPP power units, optimization of maintenance and repairs, risk-informed decision-making, acceptance criteria.
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