Abstract
The Four years of the IMPACT, Integrated Modular Plant Analysis and Computing Technology'project Phase 1 have been completed. At the end of Phase 1,the Basic Single-, Two-, Multi-Phase Flow Analysis Modules of various coordinates have been parallelized. The verification study of Severe Accident Analysis Code SAMPSON prototype developed in Phase 1 was conducted in two steps. First, each analysis module was run independently and analysis results were compared and verified against separate-effect test data with good results. Second, with the Simulation Supervisory System, up to 11 analysis modules were executed concurrently in the parallel environment (currently, NUPEC uses IBM-SP2 with 72 process elements), to demonstrate the code capability and integrity. The target plant was Surry as a typical PWR and the initiation events were a 10-inch cold leg failure. The work is sponsored by the Ministry of International Trade and Industry, Japan.
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