Experimental and theoretical justification of passive heat removal system for irradiated fuel assemblies of the nuclear research reactor in a spent fuel pool

Van Thuong Ta; Tashlykov O.L.; Glukhov S.M.; Shumkov D.E.; Volchikhina Yu.V.

doi:10.1016/j.net.2023.02.028

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자료유형: 학술저널

저자정보: Van Thuong Ta (Ural Federal University) Tashlykov O.L. (Ural Federal University) Glukhov S.M. (Ural Federal University) Shumkov D.E. (Ural Federal University) Volchikhina Yu.V. (JSC “Institute of Nuclear Materials”)

저널정보: 한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제55권 제6호

발행연도: 2023.6

수록면: 2,088 - 2,095 (8page)

DOI: 10.1016/j.net.2023.02.028

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The safety of nuclear installations is largely determined by the tightness of fuel elements cladding. As the Fukushima nuclear accident showed, the main task in case of loss of power supply is to ensure reliable removal of residual heat release from spent fuel pool (SFP) with irradiated fuel assemblies (IFAs). The paper presents the results of calculated-experimental studies and thermal-hydraulic modeling of tem perature storage modes of IFAs in SFP. Experimental studies of SFP's temperature regime and calculated evaluation of residual heat removal due to the thermal conductivity of building structures surrounding the SFP were performed. To ensure the safe operation of research reactors, it's necessary to know the IFA's residual heat power (RHP) in the reactor and SFP, which is determined depending on the operating time of fuel assemblies (FAs) and the IFAs calculated holding time. The FAs operating time depends on the reactor energy output. The IFAs calculated holding time is determined by the fuel burnup, U-235 mass in the fuel, and reactor utilization factor. The IFAs fuel burnup was calculated using the MCU-PTR program. Also presented are the RHP's calculation results using some of the empirical dependencies. The concept of a passive heat removal system (PHRS) based on thermosyphon's operating principle was proposed.

#Passive heat removal system #Nuclear research reactor #Irradiated fuel assemblies #Spent fuel pool #Residual heat power

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