MELCOR Plug-in

This plug-in provides pre- and post-processing support for the MELCOR 2.1/2.2 code.

Change Log

Version 3.0.2 - Released 3/21/2025

• ASCII Contexts have been fully added to Control Volumes, Flow Paths, Accumulators.
• ASCII Context have been added to some of the CAVITY component inputs.
• ASCII Context have been added to the MELCOR specific dialogs of Model Options.
• The Collision Diameter, Epsilon, Conductivity Switch, Viscosity Switch, Thermal Conductivity, Viscosity, and Viscosity Conductivity properties are now disabled for Version 1.8.6.
• The Noncondensible Gases POOL, FOG, and H2O-VAP are now not exported in a 1.8.6 context since they all MELCOR calculations are assumed to involve water in the pool, liquid water in the atmosphere and water vapor in the atmosphere.
• The Core Component was updated to resolve issues submitting MELGEN jobs that include the COR_SA record. The default value within the COR_SA record was updated to export 0.0 instead of -1.1 and the COR_SA ASCII export was updated to include all of the active core cells.
• An issue was resolved that suppressed messages to be displayed in the message table after changing the model version.
• An issue was resolved within the RadioNuclide ASCII export when exporting the RN1_WSC record with the heat structure side set to RHS.
• The ASCII export for the RadioNuclide component RN1_GAP00 record was updated to not support exporting the word 'ALL' when all of the rings or all of the levels are selected as the core cell range. The word 'ALL' is not supported by MELGEN code execution.
• The RadioNuclide component ASCII export was updated to always export the heat structure and control volume component names within the RN1_DHVS and RN1_DHSS records. This resolves errors when submitting job streams that include those records.
• The Control Volumes Package category within the navigator has been updated to show the correct properties within a restart cases ASCII Viewer.
• The [FL_VLV] Valve Input, [FL_PMP] Pump Input Data, and [FL_VTM] Time Dependent Flow Path cards now support updated ASCII context.