MELCOR Plug-in

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

Change Log

Version 3.0.3 - Released 7/25/2025

• COR_RBV's icvhb property has been updated to be exported within a PWR Type Reactor.
• An issue has been resolved that would prevent opening a plot file from a path with control characters under windows.
• A bug has been resolved that caused the RadioNuclide component 'Show ASCII' menu item to not appear within the right-click menu.
• The 2.2 ASCII import logic for sprayer components has been updated to support when the ISPCON word does not exist.
• The Vector Index column has been removed from the arguments dialog in 1.8.6. as it is not needed for the code version.
• Heat Structures and the heat structure package have been updated to support ASCII Context.
• Control Functions, EDF, Tabular Functions, and Control System Ranges support ASCII Context
• The Cavity has been updated write its values immediately upon Show ASCII is selected during a restart case.
• Tabular Functions can now be edited within a restart case.
• The CAV_U attribute group now supports ASCII Context within the Cavity for code versions 2.2 and 1.8.6.
• Context has been added for properties within the Burn Component in Melcor versions 1.8.6 and 2.2.
• All of the properties within the Pump Input Data attribute group in the Flow Paths component now support context (Version 2.2).
• The Mole Fraction column in the Material Row Fractions table within the Control Volumes component now selects the proper column when the context is selected
• The H2O Vap. Part. Pres. property within the Control Volumes component now supports context properly (Version 1.8.6)
• Support has been added for the Plot Format property when defining the Plot file in MELCOR.
• Support has been added for the NCYSTP & NCYUIN properties on the EXEC_CYMESF.
• The 2.2 ASCII import behavior has been updated to support importing the MEL_RFMOD input record.
• Fixed ASCII Export and Import of the RNTRN records targeting a heat surface when the source is not a heat surface.
• Updated the 1.8.6 ASCII Import of the RN package to handle a constant pressure value in the Jet Injection record.
• An ASCII 1.8.6 import issue was resolved that would throw software errors when importing a burn component with a placeholder value for control volume in the completeness table.