Time-Dependent Kobayashi Dog-Leg Benchmark for Neutron Transport

Problem description

A mono-energetic, 3D shielding system featuring a dog-leg vacuum channel surrounded by a shielding material.

The problem is based on an NEA steady-state fixed-source benchmark problem suite [link]. Time dependence is introduced by turning the fixed source into a discrete pulse within t = 0 to t = 50. The problem is simulated up to t = 200. Quantities of interest are the 4D flux distribution, ϕ(x,y,z,t), in a uniform mesh of size 60x100x60x100 and the total neutron density in time.

Data provided

build-xml.py: OpenMC XML input builder script

output_*.h5: OpenMC Statepoint results run with increasing numbers of source particles per batch (over 30 batches).

mgxs.h5: OpenMC multigroup cross-section data

mean.gif and sdev.gif: Visualizations of the quantities of interest from output_4.h5 data

difference.gif: Relative difference between MC/DC and OpenMC results

convergence.png: Convergence of the 2-norm of the relative difference between MC/DC and OpenMC results

The OpenMC results were generated using the following release.