The paper presents specific approaches to modeling the spent fuel pool (SFP) of Fukushima Daiichi NPP and results of thermohydraulic calculations of severe accidents in SFP using MELCOR 1.8.6 computer code. The dynamics of main processes accompanying severe accident progression in SFP of such a type was defined based on computer analysis. Obtained results may be used to improve available SFP computer models to receive more reliable data on the progression of emergency processes in NPP SFPs.
2. Gauntt, R.O., Cash, J.E., Cole, R.K., Erickson, C.M., Humphries, L.L., Rodriguez S. B., Young M. F. (2005), “MELCOR Computer Code Manuals”, Vol. 1, Primer and User’s Guides, Version 1.8.6, Albuquerque, September 2005, 785 р., NUREG/CR-6119.
3. “Status Report on Spent Fuel Pools under Loss-of-Cooling and Loss-of-Coolant Accident Conditions”, 2015, 202 p., NEA/CSNI/R(2015)2, available at: http://www.oecd-nea.org/nsd/docs/2015/csni-r2015-2.pdf
4. “Sandia Report, Fukushima Daiichi Accident Study (Status as of April 2012)”, Albuquerque, 2012, 298 p., NEA/CSNI/R(2015), available at: https://fukushima.inl.gov/PDF/FukushimaDaiichiAccidentStudy.pdf