Modeling the emergency processes proceeding in the containment of NPP with water-water energy reactor
https://doi.org/10.29235/1561-8358-2020-65-2-224-234
Abstract
The article presents the results of computational modeling of the development of accidents in the containment of NPP with water-water energy reactor (WWER) using the COCOSYS software. The containment of the Balakovo NPP with WWER-1000/V-320 was selected as the object of study. The results of the calculation of environmental parameters in the containment during a beyond design basis accident with a “large” leak from the primary circuit at the following initial events: break of the main circulation pipeline DN850 with a full cross section at the reactor inlet, with simultaneous failure of all AC sources including diesel generators for a long period, without operating personnel intervention. A comparison of the results of calculations with the results obtained using the ANGAR software certified by Rostekhnadzor is performed. The calculation results are in good agreement: emergency scenarios are similar; the maximum deviation from absolute pressure values is less than 10 %. Thus, it was concluded that the analysis of processes occurring in the NPP containment during an accident can be performed using the COCOSYS code. This software can be used to independent safety assessment of NPP required by the IAEA standards.
About the Authors
D. L. Tretinnikov
Joint Institute for Power and Nuclear Research – Sosny of the National Academy of Science of Belarus
Belarus
Belarus
Denis L. Tretinnikov – Researcher
47/22 Prilesye district, Lugovaya Sloboda village council, Minsk district, 223063, Minsk region
A. V. Doinikova
Joint Institute for Power and Nuclear Research – Sosny of the National Academy of Science of Belarus
Belarus
Belarus
Anastasiya V. Doinikova – Junior Researcher
47/22 Prilesye district, Lugovaya Sloboda village council, Minsk district, 223063, Minsk region
P. K. Nagula
Joint Institute for Power and Nuclear Research – Sosny of the National Academy of Science of Belarus
Belarus
Belarus
Petr K. Nagula – Ph. D. (Engineering), Head of the Laboratory
47/22 Prilesye district, Lugovaya Sloboda village council, Minsk district, 223063, Minsk region
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