CONCURRENT SIMULATION OF REACTOR CORE DYNAMICS

The paper illustrates the use of parallel processing to simulate dynam ical systems described by a complex high-dimensional set of ordinary d ifferential equations. A substantial paradigm problem is drawn from th e nuclear industry to illustrate the use of an integrated parallel pro cessing methodology. This includes heuristic rules for algorithm and a rchitecture selection, a classification for decomposition techniques, and their use in a well known and structured top-down approach. A new (parallel) version of the Davison-Cross stiff system solver is introdu ced and used in five different parallel processing configurations. Sig nificant benefits owing to the extensive use of parallel emulation tec hniques to iteratively propose and refine candidate parallel processin g solutions are highlighted.