Uncertainty quantification of lumped fission product cross section for fast reactor application

Chiba, Go

The uncertainty of the lumped fission product (FP) cross section is quantified by using the covariance data given in TENDL-2008 and the low-fidelity covariance (Low-Fi). The relative standard deviations of the one-group capture cross section of the lumped FP are calculated as 4.7% with TENDL-2008 and as 1.5% with Low-Fi. It is found that TENDL-2008 gives larger uncertainty to the FP nuclear data than Low-Fi. In addition, the lumped FP cross sections are calculated with various nuclear data libraries including JENDL and it is found that the largest difference in the one-group capture cross sections among these libraries is 3.8%.