Silene and TDT: a code for collision probability calculations in XY geometries

摘要

The SILENE and TDT package has been developed at the CEA in order to provide tracking routine (to compute neutron trajectories) as well as reference calculations in arbitrarily shaped XY geometries. This package combines a direct graphical acquisition system (SILENE) together with a node-based collision probability code for XY geometries (TDT). The code solves the one-group transport equation with isotropic scattering using an interface-current formalism based on a flat-flux collision probability approximation. The package has been introduced as a module in the multigroup APOLLO-II code; first results give computational times comparable to those with traditional collision probability methods. An example is given with a one-group calculation for a RMBK fuel channel geometry with a constant source in the graphite matrix. 1 fig., 1 tab., 6 refs. (Atomindex citation 27:012313)