[1F12-14] Analysis Method Development 2

[1F14] Sensitivity analysis of prompt neutron decay constant using perturbation theory

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

Keywords:prompt neutron decay constant, ω-eigenvalue calculation, sensitivity analysis, perturbation theory, adjoint calculation

The prompt neutron decay constant α can be measured by subcritical experiments such as the reactor noise analysis and the pulsed neutron source method. For the uncertainty quantification of α and for the data assimilation using α, the sensitivity analysis method for the prompt neutron decay constant is newly developed using the first order perturbation theory, which utilizes the adjoint eigenfunction of ω-eigenvalue calculation.