Collision Probability Calculation and Multigroup Flux Solvers Using Pvm

Collision probability (CP) evaluation and ux computation share the most time consumed in the applications based on the linearized time-independent transport equation. In this paper, parallelization for CP calculation and multi-group ux computation are investigated. Particular techniques pertinent to the two-step energy/space iterative process of solving a multigroup transport equation are described. The parallel performance is studied in cases where the cyclic tracking technique is used to integrate CP. Parallelization is achieved by distributing either diierent energy groups or diierent regions on set of processors. These algorithms were tested on 4 processors IBM SP-2, 8 processors SPARC 1000 as well as networks of workstations using the public domain PVM library. Typical run times are provided for unit cell calculations.