Reactivity Impact of 2H and 16O Elastic Scattering Nuclear Data on Critical Systems with Heavy Water

Very low-energy nucleon-O16coupled-channel scattering: Results with a phenomenological vibrational model

“…The calculation performed and the results obtained show that the approach has potential interest for any application where the determination of low-energy cross section are of great importance. For instance, the low energy regime is of import for capture cross sections [44], as well as for nuclear reactor physics applications [45].…”

Application of the CAB evaluation of thermal scattering law for heavy water to ZED-2 critical benchmarks at room temperature

“…Use of the new trial evaluations of 16 O in modelling the thermal critical systems is expected to aid in the assessing the impact of a decrease in hr s ð 16 OÞi (and hr tot ð 16 OÞi) by ' 1 À 2%. It is expected that the criticality will decrease as well (Roubtsov et al, 2014;Leal et al, 2016).…”

“…The reasons for these discrepancies have been traced to imperfections of the modern evaluations for deuterium (Kozier et al, 2011;Morillon et al, 2013) and oxygen (Kozier et al, 2013;Roubtsov et al, 2014;Taylor and Hollenbach, June 2013) but, for thermal systems, they could also be related to the thermal scattering cross sections of deuterium and oxygen bound in heavy water. In this paper, we use the CAB evaluation of the neutron thermal scattering kernel for liquid heavy water , and present the results of nuclear criticality calculations for selected heavy water moderated and/or reflected benchmark systems that were added recently into the ICSBEP (Briggs, 2016) and IRPhEP (Bess, 2015) projects.…”

Improvement on the calculation of D2O moderated critical systems with new thermal neutron scattering libraries

“…The reasons for these discrepancies have been traced to the evaluations for deuterium (Kozier et al, 2011;Morillon et al, 2013) and oxygen (Kozier et al, 2013;Roubtsov et al, 2013;Taylor and Hollenbach, 2013) but, for thermal systems, they could also be related to the thermal scattering cross section of deuterium and oxygen bound in heavy water. In this paper, we present results of nuclear criticality calculations for heavy water moderated and/ or reflected benchmark systems that are particularly sensitive to modifications in the thermal scattering cross sections (scattering kernels).…”