MELCOR Plug-in

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

Change Log

Version 2.4.0 - Released 10/25/18:

• The MELCOR Case component has been updated to resolve an issue that would prevent graphically editing a MELCOR 1.8.6 case that includes blank lines.
• An issue was resolved that caused the right-click "Export -> MELGEN" menu item to export only the current model regardless of the model selected.
• The Heat database variables have been updated to disable the Heat Structure property for the following variable types: DEGAS_ENERGY, DEGAS_MASS, DEGAS_RATE, ITER_FREQ, Q_RADG, CPUC, CPUE, CPUR:
• The Core database variables have been updated to disable the Core Cell property for the following variable types: QTOTLH_TOT, DMCO_TOT, DMCO2_TOT, DMCH4_TOT, MEJEC_TOT, DT, NCYCLE, CPU, MASSERR, ENERGYERR, REL_ENGY_ERR, REL_ENGY_ERM, MASS_DISCARD, ENGY_DISCARD, HTCLH_AVE, QFLXLH_AVE
• The Path database variables have been updated to disable the Flow Path property for variable type MACCS-RHONOM.
• The ASCII import logic for parsing floating point values was updated to handle engineering notation that uses the 'd' or 'D' character to define the exponential value.

The following issues are still under development:

• This update includes the initial phase of support for the MELCOR 2.2 input specification. The following packages have been updates to support MELCOR 2.2 :
  • Core (COR), Radionuclide (RN), Lower Head (LHM), Control Functions (CF), and Heat Structures (HS)
• Support for the remaining MELCOR 2.2 packages will be included in a future release.
• An issue was resolved where heat structure left boundary control function values were not written with the proper formatting.
• The Core Variable ASCII import logic was updated to resolve an issue that caused COR-AFLMIN values to be imported as zero.
• A variety of issues have been resolved that prevented information from the External Mass and Energy Sources and Water Source Data card in the CVH package from being imported. SNAP now correctly differentiates between the two card formats for the CVnnnFi card. Additionally, an error has been resolved which prevented an External Data File from being imported when the file location was not in the same directory as the MELCOR ASCII file being imported.
• Resolved an issue in which CFLIML and CFLIMU values on card CF_ULB were unnecessarily exported as 0.0 when ICFLIM was set to 'DEFAULT'.
• The confirmation dialog displayed when the user modifies the Code Flavor in Model Options has been updated to include an additional warning if the RN package's Default Scheme flavor does not match the new flavor the user has selected. In addition, an error has been resolved which would cause the combo box value to be set when the user had pressed the confirmation dialog's Cancel button.
• The MELCOR Plug-in was updated to write the ESF_INPUT header only when the Condenser (CND), Fan Cooler (FCL), or Passive Autocatalytic Recombiner (PAR) are being used. Additionally, a new flag (Activate ESF Input) has been added to Model Options that allows the user to explicitly include the ESF_INPUT.
• The number of Axial Levels and Radial Rings are now properly set when changing the Core nodalizations.
   The MELCOR Plug-in's Export menu items have been updated to include the MELCOR option only when editing a restart case otherwise the MELGEN option is included.
• The Diffusion Setup, Transport Diffusion Input, FP Release Input, and FP Transport Input files are now included with submitted Job Streams.