DOMAIN DECOMPOSITION PARALLELIZATION OF NEUTRON TRANSPORT CALCULATIONS

摘要

A Domain Decomposition method is presented in view of the parallelization of large neutron transport calculations. The second-order even-parity form of the time-independent Boltzmann transport equation is considered, with spatio-angular discretization performed using finite elements and spherical harmonic expansions (P_N method). Enabling one processor to handle more than one domain yields proper evaluations of the speed-up, and allows the use of a better-quality decomposition (better load balancing) without requiring a higher number of processors.