The results of an experimental study associated with the departure from nucleate boiling flux on the surface of a flat plate in the absence of a directional movement of borated water burdened with debris are presented. The experiments model the external surface cooling of a water-water energy reactor molten core catcher in the case of a severe accident involving the destruction of the reactor vessel. The obtained data showed that critical heat flux can be approximately a quarter lower for debris-burdened water than for pure process water under the same conditions. At elevated temperatures, debris components containing epoxy resin particles adhere to surfaces to impair heat transfer.
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Translated from Atomnaya Énergiya, Vol. 133, No. 3, pp. 170–174, September, 2022.
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Chernyi, O.D., Sazontov, A.S., Devyatkin, M.V. et al. Experimental Study of Departure from Nucleate Boiling on the Surface of a Molten Core Catcher Under Conditions of Boiling Borated Water with Debris. At Energy 133, 182–186 (2023). https://doi.org/10.1007/s10512-023-00992-7
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DOI: https://doi.org/10.1007/s10512-023-00992-7