3rd Meeting of the “European MELCOR User Group“ ENEA, Bologna, Italy April 11-12, 2011 Title Speaker Agenda List of Participants Fukushima Accident Description M. Sangiorgi Estimate of Reflood Times and Flow-Rates for Spent Fuel Pool to Avoid Breakaway Oxidation of Cladding based on MELCOR Data G. L. Horvath Calculations regarding the Spent Fuel Pool Problem B. S. Jaeckel MELCOR validation against Experiments on Hydrogen Distribution J. Duspiva MELCOR validation against Experiments on Hydrogen Deflagration J. Duspiva Investigations of Gas stratification break-up in Containment for reactor safety issues J. C. Birchley MELCOR Code Development Status, Code Assessment, and QA L. L. Humphries Experiences with MELCOR 1.8.6 for Level 2 PSA Plant Analyses T. Steinroetter Modelling of Molten-Corium Concrete Interaction using MELCOR 1.8.6 B. S. Jaeckel MELCOR 2.1 Code performance improvement N. Mosunova Comparing results starting from an identical problem description M. Sangiorgi Development of an expert system VEHA S. Philipov MELCOR 1.8.6 Thermal Hydraulic and Iodine Release Calculations for a Small LOCA Initiated Severe Accident with Accident Mitigation Measures G. L. Horvath Overview of 2010 CIEMAT Activities involving the MELCOR Code C. Lopez MELCOR post-processing using open source tools P. Vokac