Sensitivity Analysis for a Specific Fusion Reactor Shielding Experiment Containing Tungsten

Calculated and experimental results for the transmission gamma-ray spectra when ∼14-MeV neutrons are incident on a laminated slab configuration of stainless steel, borated polyethylene, and Hevimet (90 wt% tungsten, 6 wt% nickel, 4 wt% copper) were shown to be in substantial disagreement. The results of a cross-section sensitivity analysis (based on the two-dimensional model of the experiment used previously) are presented. In the analysis, only the nuclear cross-section data for the elements in Hevimet were considered. The cross-section sensitivities are found to be quite small, and it is unlikely that the disagreement is due to errors in the cross-section data used for the elements in Hevimet.