The heat effect of passive catalytic hydrogen recombiners on the AES-2006 sealed containment is examined. It is shown by computational means that the maximum temperature of the containment near the re-combiners is exceeded locally in regimes characteristic for accidents and without adoption of measures to limit the heat flow onto the containment. Methods are proposed for lowering the containment temperature by choosing the length of the mounters, thermal insulation of the back wall of the recombiner, and thermal insulation of the sealed containment as well as by polishing surfaces or installing a screen. Calculations are presented of the thickness of the insulation and the length of the mounters, making it possible to attain reliable protection of the confinement from overheating at different working temperatures of the catalyst and hydrogen concentration in the confinement atmosphere. The radiative heat exchange is described within the scope of the zonal method. The examined methods of protection can be used at the construction stage as well as during reconstruction of operating power-generating units.
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Translated from Atomnaya Énergiya, Vol. 128, No. 6, pp. 303–309, June, 2020.
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Sorokin, V.V. Thermal Insulation for AES-2006 Sealed Containment Protection from Passive Catalytic Hydrogen Recombiners. At Energy 128, 325–332 (2020). https://doi.org/10.1007/s10512-020-00695-3
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DOI: https://doi.org/10.1007/s10512-020-00695-3