Problems with the use of MPICH multi-node parallel computation of depletion

[khurrum]

I am not sure but i think this can be an issue of serial/parallel mpi4py.

also try setting this in the script.

openmc.deplete.pool.USE_MULTIPROCESSING = False

Try looking at this thread for detail.

Is mpi4py file required for running depletion simulation not in parallel?

mpi4py is only required if you wish to run openmc + depletion in parallel with distributed memory under mpi. In this case, each computational node is responsible for depleting a subset of materials and reporting back to the main data file. If you run openmc + depletion without mpi, then you don’t need mpi4py. Materials are still depleted “in parallel” via the python multiprocessing module. This is also the case when running under mpi. If you want to run entirely in serial (no mpi, no multiproc…

i hope that helps