Development of a two-dimensional model for the thermohydraulic analysis ofthe hot pool in liquid metal reactors

The SSC-K code has been developed at KAERI based on SSC-L originally develo ped at BNL to analyze loop-type LMR transients. Because the dynamic respons e of the primary coolant in a pool-type LMR. particularly the hot pool conc ept. can be quite different from that in the loop-type LMR, major modificat ions of SSC-L have been made for the safety analysis of the KALIMER. In par ticular, it is necessary to predict the hot pool coolant temperature distri bution with sufficient accuracy to determine the inlet temperature conditio ns for the IHXs because the temperature distribution of a hot pool can alte r overall system response. In this paper a two-dimensional hot pool model i s developed and compared with the experimental data. A preliminary evaluati on of unprotected loss of heat sink accidents for the KALIMER design with u pdated SSC-K code has been performed and analyzed. (C) 2001 Elsevier Scienc e Ltd, All rights reserved.