Risk-oriented aging management the electrical equipment by technical state in NPP normal operation system

Alexander Nazarychev, Dmitriy Andreev, Olga Melnikova, Andrey Pugachev
2023 AIP Conference Proceedings  
The report considers certain issues of risk-oriented aging management of electrical equipment for normal operation of nuclear power plants (NPP). The proposed approach makes possible to determine the technical resource and the probabilities of failure-free operation and failure of electrical equipment basing on its technical stated index data. Test calculation examples are given to confirm the possibility of using the proposed approach in practice. INTRODUCTION This report is a continuation of
more » ... he topic raised by the authors at the workshop in 2020 [1] . As noted earlier, the issues of managing the aging of electrical equipment (EE) of normal NPP operation (the fourth safety class according to [5] ), as well as EE, which is out from nuclear facility and which is not of its part, but one way or another associated with it, have not worked out complete enough. However, exactly this equipment not affecting the safety of the NPP, directly affects various types of risks, including the risks of stopping or limiting the supply of electrical power to the grid, commercial risks, risks of violation of technical and fire safety, risks of disturbance of the power system stability, as well as other technical and production risks. Nevertheless, at the level of state regulations of the Russian Federation and local regulations of individual companies, the prerequisites for aging management of general industrial equipment had already been created. Taking into account the main provisions of [3, 4] , it is proposed in [1] to apply methods and models for assessing the technical state (TS) and reliability indicators of EE taking into account the technical state index (TSI) which were developed in [5, 6, 7] and some number of other authors' works. It is assumed that, jointly with the IAEA methodology for managing the aging of NPP equipment of safety classes 1, 2, 3, the application of these approaches will provide a general solution for the problem of managing the aging of NPP equipment. The basis for effective management of EE aging is a justified control over the TS at each stage of the NPP life cycle, focused on potential technical and production risks. Well known, in 2014 V.V. Putin instructed state corporations to formulate internal regulations on their own risk management systems. Thus, according to [8], for effective management and sustainable development, ROSATOM began work on the formation of the Corporate Risk Management System (CRMS), which implies the integration of the accumulated experience of risk management into the general corporate system that provides comprehensive management of technical, technological, operational, investment and other risks. The Federal Environmental, Technological and Nuclear Supervision Service of Russia in terms of the V.V. Putin's instructions and also the execution of a number of provisions of federal laws developed and enacted [11] methodological recommendations for conducting scheduled inspections of electric power entities operating on the production of electric energy on thermal power plants (TPP), using a risk-based approach. A risk-based approach under the conducting scheduled inspections of electric power industry entities engaged in the production of electric
doi:10.1063/5.0114598 fatcat:idzm72jybfhidle24w5r2n3faq