The results of experimental investigations of a heat-transfer crisis and post-crisis heat-exchange across the full-cross-section of an electrically heated model FA of a cassette-type core are reported. The test stand, assembly, and experimental procedure are presented, and the onset of the crisis in a cross-section of the assemblies is described. Comparative assessments of the influence of the changes in the regime parameters on the critical power are presented. It is shown that the investigations of the post-crisis temperature state prove that for a short time FAs can function under conditions with degraded heat transfer up to 5% above the critical heat fl ux. The results of these investigations can be used to validate the heat-engineering reliability of the core of an RITM-200 reactor for small NPPs.
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Translated from Atomnaya Énergiya, Vol. 133, No. 1, pp. 30–33, July, 2022.
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Dmitriev, S.M., Samoilov, O.B., Kupriyanov, A.V. et al. Experimental Investigations of the Onset and Growth of a Heat-Transfer Crisis in a Full-Scale Cross-Sectional Model FA of the RITM-200 Reactor for Small NPP. At Energy 133, 30–34 (2022). https://doi.org/10.1007/s10512-023-00968-7
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DOI: https://doi.org/10.1007/s10512-023-00968-7