Validation of Integrated Burnup Code System SWAT2by the Analyses of Isotopic Composition of Spent Nuclear Fuel

摘要

This paper provides validation results of SWAT2, the revised version ofrnSWAT, which is a code system combining point burnup code ORIGEN2 andrncontinuous energy Monte Carlo code MVP, by the analysis of postrnirradiation examinations (PIEs). Some isotopes show differences ofrncalculation results between SWAT and SWAT2. However, generally, therndifferences are smaller than the error of PIE analysis that was reported inrnprevious SWAT validation activity, and improved results are obtained forrnseveral important fission product nuclides. This study also includesrncomparison between an assembly and a single pin cell geometry models.