DASSH upgrade

NEW PRE-CHECKS --------------

• Spacer grid axial positions are within pin-bundle region
• Paths to hot channel subfactors exist
• HCF subfactors are readable and valid (maybe call DASSH module?) -> not prioritized since DASSH is already doing such pre-check.

PYDASSH DEVELOPMENT

• New PyARC-DASSH input translation options
• Develop template data (material properties, HCF)
• Postprocessing updates: pressure drop table, pin temperature table.
• Update plot_2d

NEW UNIT TESTS

• Pre-check input tests to make sure the new checks raise errors (x5)
• Prerun test to confirm that input with new features is translated correctly
• Postprocessing unit tests for different pressure drop options (gravity, spacer)
• Postprocessing unit tests for hot channel factors options    e.g. Some assemblies with HCF, others without

Parallel execution for multiple timesteps

• Postprocessing updates - connect timesteps with DASSH-generated subdirectories.

SCHEMA update

• If user specifies KCBARE mixing correlation, wire diameter should be 0.0
• Parallel execution option
• If user specifies grid spacer parameters, wire diameter should be 0.0
• Provide default options for solidity

DOCUMENTATION

• Update CHANGELOG
• Update Tutorial-Sample 16 (add HCF and other new options as relevant)
• Develop LFR model
• Training slides