Validation of the Arlanna-2 Code on the Basis of the HDR V44 and T31.5 Tests

Abstract

The validation and qualification of the ARIANNA-2 computer code have been verified against a broad spectrum of experimental results. The assessment strategy, based on a large analytical and experimental program, includes a numerical benchmark problem. separate effects phenomena, and simple and complex containment system geometries for investigating thermal-hydraulic transients in multicompartment containment systems following a LOCA or a severe accident. An assessment of the ARIANNA-2 computer code is presented, using the large-scale HDR (FRG) containment system V44 and T31.5 tests. Those tests provided information on the code's ability and its limitation in analyzing thermal-hydraulic transient of a PWR multicompartment containment system following a LOCA. The main results are described and the significant experience gained in both tests is discussed.