Abstract
In this study, the handling and transfer stages were established by CFD (Computational Fluid Dynamics). In order to obtain the burnup information of a single rod in the core, a single rod of Chinshan NPP was modeled by FRAPCON-3.5 and FRPTRAN-1.5. Then, using the boundary condition from the CFD analysis, the fuel behaviors and performances were analyzed in detail with the FRAPTRAN-1.5. Three different thermal loads were considered in this paper: 7kW, 14kW, and 21kW. The simulation results showed that, in all the cases, (i) during the handling and transfer stages, the maximum cladding temperature was in the range of 477K to 653K;(ii) the maximum cladding hoop strain was in the range of 0.0018 to 0.0025; and (iii) the structural radial gap was almost kept as a constant. Based on these results, the fuel cladding integrity was maintained in the handling and transfer stages. These results help evaluating the safety issue of the dry-storage system for Chinshan NPP.