VVER-1000 BURNUP CREDIT BENCHMARK (CB5). NEW RESULTS EVALUATION
18th Symposium of AER on VVER Reactor Physics and Reactor Safety (2008, Eger, Hungary)
Physical problem of Spent Fuel, Decommissioning and Radwaste
Abstract
The validation of depletion codes is an important task in spent fuel management, especially for burnup credit application in criticality safety analysis of spent fuel facilities. Because of lack of well documented experimental data for VVER-1000, the validation could be made on the basis of code intercomparison based on the numerical benchmark problems. Some years ago a VVER-1000 burnup credit benchmark (CB5) was proposed to the AER research community and the preliminary results from three depletion codes were compared. In the paper some new results for the isotopic concentrations of twelve actinides and fifteen fission products calculated by the depletion codes SCALE5.1, WIMS9, SCALE4.4 and NESSEL-NUKO are compared and evaluated.