Sandia Energy > Programs > Nuclear Energy > Nuclear Energy Safety & Security > MELCOR MELCOR is a fully integrated, engineering-level computer code developed by Sandia National Laboratories for the U.S. Nuclear Regulatory Commission to model the progression of severe accidents in nuclear power plants. A broad spectrum of severe accident phenomena in both boiling and pressurized water reactors is treated in MELCOR in a unified framework. MELCOR applications include estimation of severe accident source terms, and their sensitivities and uncertainties in a variety of applications. Documentation MELCOR documentation listed below can be found on the U.S. Nuclear Regulatory Commission ADAMS site. MELCOR 2.2 Documentation MELCOR 2.1 Documentation Events “MELCOR Computer Code Manuals, Vol. 1: Primer and Users’ Guide, Version 2.2.9541,” SAND 2017-0455 O, Sandia National Laboratories, January 2017 (ADAMS Accession No. ML17040A429). “MELCOR Computer Code Manuals, Vol. 2: Reference Manual, Version 2.2.9541,” SAND 2017-0876 O, Sandia National Laboratories, January 2017 (ADAMS Accession No. ML17040A420). “MELCOR Computer Code Manuals, Vol. 1: Primer and Users’ Guide, Version 2.1.6840,” SAND 2015-6691 R, Sandia National Laboratories, August 2015 (ADAMS Accession No. ML15300A479). “MELCOR Computer Code Manuals, Vol. 2: Reference Manual, Version 2.1.6840,” SAND 2015-6692 R, Sandia National Laboratories, August 2015 (ADAMS Accession No. ML15300A473). “MELCOR Computer Code Manuals, Vol. 3: MELCOR Assessment Problems, Version 2.1.7347,” SAND 2015-6693 R, Sandia National Laboratories, August 2015 (ADAMS Accession No. ML15300A476). Register for 2021 VIRTUAL CSARP & MCAP Meetings Mon, Jun 7, 2021, 4:00 AM –Fri, Jun 11, 2021, 8:00 AM MDT The next Cooperative Severe Accident Research Program (CSARP) technical review and MELCOR Code Assessment Program (MCAP) meetings will be held virtually on June 7-11, 2021. There will be no MELCOR workshop. The purpose of the CSARP/MCAP meetings is to exchange technical information on severe accident research including experiments and analytical models to address regulatory and safety issues. The meetings are open only to CSARP members. • Platform: Microsoft Teams • Start time: 6:00 AM US EDT (UTC-4; 12:00 PM Paris; 7:00 PM Tokyo) • Sessions: 4 hours maximum each day • Presentations: 20 minutes maximum including Q&A MELCOR links Request MELCORBugzilla MELCOR Contacts Larry L. Humphries, PhDMELCOR Principal Investigatorllhumph@sandia.gov David L. Luxat, PhDManager, Severe Accident Modeling and Analysisdlluxat@sandia.gov