An example DAGMC simulation with automatic installation scripts for DAGMC, Pyne, Moab and other dependencies.
Starting with a fresh install of Ubuntu 18.04 with Trelis version 16.5 installed and MCNP6.1.1 source code located in the $HOME/MCNP6/Source folder. DAGMC and dependencis can be installed by running the bash run_all.sh script located in the install_scripts folder.
Unfortunatly the geometry can not be included in this repository but is available for download from the Eurofusion IDM. Once the geometry is aquired the DAGMC model and materials can be built using scripts.
After installing and downloading the geometry there are 3 stages required to complete a DAGMC simulation
The complete suit of materials including Eurofer, Tungsten, SS316 and other materials required by the DEMO model can be created using the following command.
python3 make_materials.py
This will output a materials.h5 file which will be used later.
A freecad script is available for creating the wedge which is used for reflecting surfaces. Note that this instruction assumes freecad is installed with Python2.
python2 make_solid_for_reflecting_surfaces
The make_dagmc_geometry_with_material_tags script will load STEP files, tag volumes then with material names, build a graveyard volume and identify reflecting surfaces. The script must be run with trelis and can be run using the following command.
trelis make_dagmc_geometry_with_material_tags.py
or without the GUI
trelis -batch -nographics make_dagmc_geometry_with_material_tags.py
This will export a tagged geometry file called geometry_with_material_tags.h5m
The materials.h5 file can be joined with the geometry file (which includes material tags). This operation can be checked using the command:
uwuw_preproc geometry_with_material_tags.h5m -l materials.h5 -s -v
Assuming the procedure was successful then commit the joining with the command:
uwuw_preproc geometry_with_material_tags.h5m -l materials.h5
This command will overwrite the existing geometry_with_material_tags.h5m
Once the geometry and materials are combined then a skeleton MCNP file can be created to contain the physics descriptions, neutron source and tallies. An example is provided in the dagmc_demo.inp file. You may wish to add to this.
The simulation can now be carried out using the patched mcnp exectuatable
mcnp6.mpi i=dagmc_demo.inp g=geometry_and_materials.h5m