V. I. Skalozubov, O. M. Vierinov, I. M. Verbylo, V. Yu. Kochnieva, A. V. Kanivets
Interagency Center for Fundamental Scientific Research in Energy and Ecology Sector, of the National Academy of Sciences of Ukraine, Odesa Polytechnic and Ministry of Ecology and Natural Resources of Ukraine, 1, Shevchenko Ave, Odesa, 65044
DOI: doi.org/10.31717/2311-8253.24.1.3
Abstract
The most important lesson of the Fukushima accident for the safety of nuclear power is the need to improve/modernize management strategies for continuous blackout accidents at nuclear facilities. The deterministic analysis of the continuous blackout accident at nuclear power plants with VVER-1000/320, carried out by the operating organization of the Ukrainian NPPs, recognized that the emergency supply system of steam generators is critical for safety. The work analyzes and qualifies (substantiates) the known modernizations of management strategies for the continuous blackout accidents at VVER nuclear power plants: accident management by steam generators supply with a system of passive afterheat removal from the containment (AMS1); accident management by steam generators supply with systems of mobile power supply sources, fire engines and deaerators (AMS2); management of an accident by steam generators supply with steam-driven pumps (AMS3). The results of the qualification of the modernizations of the emergency steam generator makeup system found the followings: AMS1 cannot be qualified according to the criterion of keeping the required level in the steam generator during the entire continuous blackout accident; AMS2 cannot be qualified as to the criteria of preventing radiation emissions to the environment and the required time of steam generator supply; AMS3 can be qualified to a minimum value of pressure in the steam generator of 0.3 MPa. Based on the research results, there are presented complex management strategies for continuous blackout accidents at nuclear power plants with VVER-1000 that
meet all the accepted qualification criteria.
Keywords: accident, blackout, strategy, nuclear power plant
References
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