Patent ID: 8117013
Filing Date: 2012-02-14
Classification: G21F

Abstract:
1. A computer-implemented method for calculating a transport of a high-energy neutron/ion transport flux to a target of interest within a shielded region, comprising: defining boundaries for the transport of the high-energy neutron/ion transport flux to the target of interest within the shielded region; receiving, as input, at least one of shielding dimensions, identification of shielding materials, high-energy neutron/ion flux at the boundaries, and a spatial location for the target of interest; calculating the transport of the high-energy neutron/ion transport flux to the target of interest via the equation wherein ψ wherein, when calculating the high-energy neutron/ion transport flux to the target of interest, propagated error for values calculated by the computer implemented numerical method is controlled by controlling truncation error as a third order in step size; wherein, when calculating the high-energy neutron/ion transport flux to the target of interest, the scaling factors are added to adjust for behavior associated with production of j-particles from collisions of k-particles; and wherein, when calculating the high-energy neutron/ion transport flux to the target of interest, the single residual range coordinate is introduced for all neutrons/ions in the computer implemented numerical method.