all released versions of MELCOR, to benchmark MELCOR is a fully integrated computer code that MELCOR against more mechanistic codes and models all phases of the progression of severe accidents in experimental data from severe fuel damage tests, and to light water reactor nuclear power plants, and is being evaluate the ability of MELCOR to simulate long-term developed for the U.S. Nuclear Regulatory Commission severe accident transients in commercial LWRs, by (NRC) by Sandia National

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... (SNL). applying the code to model both BWRs and PWRs. This Brookhaven National Laboratory (BNL) has a program paper presents a summary of MELCOR assessment efforts with the NRC called 'MELCOR Verification, at BNL and their contribution to NP,C goals with respect Benchmarking, and Applications,"whose aim is to provide to MELCOR [USNRC, 1992], which includes: independent assessment of MELCOR as a severe accident thermal-hydraulic/source term analysis tool. The scope of 1. MELCOR verification over the past several years this program is to perform quality control verification on during which all released versions of the code all released versions of MELCOR, to benchmark were installed on BNL's computer system, MELCOR against more mechanistic codes and verification exercises were performed, and defect experimental data from severe fuel damage tests, and to investigation reports were sent to SNL; evaluate the ability of MELCOR to simulate long-term 2.