On the treatment of neutron scattering in the resonance rangeR. Dagan1, J. Rowlands1, A. Courcelle2 and C.R. Lubitz3
1 Institute for Reactor Safety, Forschungszentrum Karlsruhe, Postfach 3640, 76021 Karlsruhe, Germany
2 CEA/Cadarache, DEN/DEC/SESC/LSC, 13108 Saint-Paul-lez-Durance, France
3 Knolls Atomic Power Laboratory, Schenectady, NY, USA
Published online: 21 May 2008
An improved double-differential resonance-dependent scattering kernel is presented and its impact on criticality, Doppler Effect, absorption, and inventory of heavy isotopes for a typical unit cell is confirmed again to be significant. The influence of solid state effects is investigated. The way the resonant crystal lattice model based on a 4-point correlation function differs from the free gas scattering kernel is discussed and the differences are shown to be small.
© CEA 2008