Figure 3

Typical Weight Window generation chain for MCNP, calculated with the ADVANTG discrete ordinates code. Left, forward flux values map interpreted by ADVANTG from the MCNP input file used as basis or the WW creation. Right, adjoint flux reflecting the importance function of the problem. ADVANTG simulations on a rectangular mesh of 5.0E+ 05 elements, Legendre polynomial order for scattering anisotropy modeling equal to 3, 8azimuthal and polar angles per octant, DPLUS MG photon library24. See Fig. 2a–c for geometry details.