Validation of Np-237 cross sections by analysis of BFS critical experiments with massively neptunium-loaded coresM. Ishikawa and T. Hazama
Japan Atomic Energy Agency (JAEA), Ibaraki 311-1393, Japan
Published online: 21 May 2008
Three series of BFS critical experiments loaded approximately with 10 kg of 237Np-dioxide were analyzed to verify the performance of major libraries with the 237Np nuclear data. The latest JENDL-3.3, ENDF/B-VII.0 and JEFF-3.1 showed satisfactory results from the 237Np data viewpoint; however some other major data such as 239Pu ν and fission, 238U µ and/or the sodium inelastic scattering cross sections of some libraries may need re-evaluation. Further, the effect of integral experimental information to obtain better predictions of reactor core parameters was demonstrated by the cross section adjustment method.
© CEA 2008