Sensitivity Analysis of JENDL-3T

T. Takeda, M. Takamoto

Osaka University, Department of Nuclear Engineering
Faculty of Engineering
Yamadaoka 2-1, Suita-shi, Osaka 565 Japan

H. Takano, A. Hasegawa

Japan Atomic Energy Research Institute
Tokai-mura, Ibaraki-ken 319-11, Japan

Benchmark test of JENDL-3T has been performed using many 1-D and a few 2-D benchmark models of fast critical assemblies. The change in core parameters such as keff, reaction rate ratio, sodium void worth, Doppler reactivity worth calculated by JENDL-3T from those by JENDL-2 is investigated. We have analyzed the change using sensitivity coefficients calculated from two-dimensional generalized perturbation calculations based on diffusion theory, and investigated the effect of main heavy nuclides. When considering the 238U inelastic scattering, we take into account individual rotation levels.

KEYWORDS: benchmark test, JENDL-2, JENDL-3T, change in core parameters, sensitivity coefficients, main heavy nuclides, 238U inelastic scattering, rotation levels