4th Meeting of the “European MELCOR User Group“ GRS, Cologne, Germany April 16-17, 2012 Title Abstract Speaker Agenda List of Participants Opening Remarks M. Sonnenkalb MELCOR Code Development Status L. L. Humphries MELCOR Modeling and Simulation of Fukushima Daiichi Unit 3 Severe Accident Y. Chen Development of an input deck for Fukushima accident, Part1 M. Sangiorgi Development of a MELCOR Input Deck for Fukushima Accident, Part2 A. Del Corno MELCOR2.1 code verification on ISP-38 experiment at BETHSY facility N. Mosunova Air ingress experiments Q-10 and Q-16 analysis with MELCOR 1.8.6 L. Fernandez‑Moguel Sensitivity study of SFP experiment with MELCOR 1.8.6 YV SFP B. S. Jaeckel SNAP Overview J. Phillips Modelling In-Vessel-Retention W. Rapp Use of MELCOR Calculations in the Frame of Level 2 Probabilistic Safety Assessment of the Belgian Plants Open document C. Ngatchou Problems with Core Bypass Atmosphere Freezing of the VVER-1000 and similar Types of Reactors: Related Hints M. Kotouc Cool-ability of used fuel in storage racks M. Loeffler Application of MELCOR to Severe Accident Analyses for Spent Fuel Pools of German Nuclear Power Plants T. Steinroetter Coupling MELCOR to other Codes T. Szabo Ex-vessel LOCA for the European HCPB TBM system using the pedigreed MELCOR182 for fusion X. Z. Jin MELCOR 1.8.6 Volatile iodine release challenges in case of external reactor vessel cooling combined with filtered vent - Effect of pH G. L. Horvath Overview of MELCOR Activities in CIEMAT (2011) C. Lopez Experience Gained Running PSA Scenarios with MELCOR 2.1 M. M. Stempniewicz MELCOR post-processing using open source tools — 2012 update P. Vokac