Python API

You can use NDManager to set the depletion chain to use for an OpenMC run.

from ndmanager.API.openmc import set_chain
set_chain("jeff33-fast")

The name provided to the set_chain function should correspond to a library installed or built with NDChain, i.e. it should show up in ndc list.

Alternatively, you can use set_nuclear_data to set both the cross-sections and depletion chains at the same time:

from ndmanager.API.openmc import set_nuclear_data
set_nuclear_data("jeff33", "jeff33-fast")