[1M05-07] Uncertainty Evaluation 2

[1M05] Nuclear data-induced uncertainty quantification of prompt neutron decay constant using the first-order perturbation theory

*Tomohiro Endo¹, Akio Yamamoto¹ (1. Nagoya University)

Keywords:prompt neutron decay constant, ω-eigenvalue calculation, the first-order perturbation theory, sensitivity analysis, uncertainty quantification

In this study, the prompt neutron decay constant α is numerically estimated using the Sn neutron transport code PARTISN for the Godiva experimental benchmark (HEU-MET-FAST-001), where the α value at critical state is measured by the Rossi-α method. Furthermore, the relative sensitivity coefficients of α to nuclear data are evaluated on the basis of the first-order perturbation theory, followed by the nuclear data-induced uncertainty quantification of α with SCALE6.2 covariance data (252groupcov7.1).