Python API

You can use NDManager to set the cross-sections library to use for an OpenMC run.

from ndmanager.API.openmc import set_nuclear_data
set_nuclear_data("jeff33")

The name provided to the set_nuclear_data function should correspond to a library installed or built with NDOmcer, i.e. it should show up in ndo list. The set_nuclear_data function work by settings the openmc.config['cross_sections'] value to the path to the correct cross_sections.xml file.