|Student Name:||MAJ Andrew Decker|
|Thesis:||Verification and Validation of MCNP6 with Neutron Protection Factor Measurements of an Iron Box|
|Location:||Rm 217, Bldg 640|
|Date & Time:||02/04/2014 at 0900|
|Abstract:|| Using a 1984 benchmark experiment, MCNP6 replicated the measurements of neutron flux and neutron protection factor (NPF) of an iron box, which simulated a basic military vehicle, resulting in less than 5% difference from published results. Additionally, the neutron flux spectrum of a 239PuBe source was characterized using a Bonner Sphere Spectrometer (BSS) and the solution unfolded using a MCNP6-generated a priori spectrum, producing a Chi^2/df of 0.97. Utilizing a steel box provided by the DTRA, measurements of neutron flux from a D-D neutron accelerator were recorded via BSS inside and outside of the box. Both flux spectra were unfolded using MCNP6 computations as a priori, which resulted in Chi^2/df values of 0.90 and 0.31, respectively. NPF assessments of the steel box were then conducted using experimental and MCNP6 flux spectra for the box, as well as H*(10) scaling, with final results differing by less than 2.5%. MAXED software was leveraged for all flux spectrum unfolding, incorporating updated BSS response functions generated within this research via MCNP6. This experiment and its results strongly support further verification and validation of MCNP6 for modeling NPF assessments of military vehicles.