[2F01-05] Uncertainty Evaluation 2

[2F03] Analysis of the effect of a resonance elastic scattering model on calculated isotopic compositions and others for light water reactor burnup fuels

*Toru Yamamoto¹, Daiki Iwahashi¹ (1. Regulatory Standard and Research Department, Secretariat of Nuclear Regulation Authority(S/NRA/R))

Keywords:Light water reactor, UO2 fuel, MOX fuel, Resonance elastic scattering model, Isotopic composition, Fuel assembly reactivity, CASMO5

In order to obtain the additional knowledge on the uncertainty in burnup calculations of light water reactor fuels, we analyzed the effect of applying the resonance elastic scattering model on the isotopic compositions, fuel assembly reactivity and others in place of the conventional asymptotic model as the elastic scattering model in the resonance energy region.