Maria A. Berberova, Viktor I. Baluta

ANO «INSC», Keldysh Institute of Applied Mathematics RAS

Nuclear power plants (NPPs), due to the accumulation during operation of significant amounts of radioactive products and the existence of a fundamental possibility of their exit in case of accidents beyond the envisaged boundaries, represent a source of potential danger or a source of risk of radiation exposure to personnel, population and the environment. The degree of radiation risk directly depends on the level of NPP safety, which is one of the main properties of NPPs, which determine the possibility of their use as sources of thermal and electrical energy. Probabilistic safety analysis (PSA) of a nuclear power plant is a complex, comprehensive systematic safety analysis, in the process of which probabilistic models are developed to determine the end states with damage to radioactivity sources and the end states of a nuclear power plant in excess of the established limits for releases of radioactive products and radiation impact on the population and the environment. environment and the values of probabilistic safety indicators are determined. The PSA results are used for qualitative and quantitative assessments of the achieved safety level, as well as for the development and adoption of decisions in the design and operation of NPPs.

uncertainty, significance, sensitivity, PSA, NPP