REACTIVITY INITIATED ACCIDENT MULTI-PHYSICS SIMULATION AND OUTPUT DATA COMPRESSION

摘要

Pin-by-pin multi-physics simulation includes theneutronics, thermal-hydraulics, thermal-mechanics andfuel performance physical models. Such calculation isexpansive and consumes a lot of computation time andmemory. Therefore, the output data which is needed forfurther analysis is better to store during a simulation inorder to prevent the repetition of calculation. However,the amount of output data can be very large andcompression algorithms have to be used. In this paper wesuggest one of such algorithms, which is based on thePrincipal Component Analysis (PCA) and the sparsematrix representation. The method was adapted andtested for the multi-physics simulation of reactivityinitiated accidents (RIA) in OPR-1000.