Flux variation with respect to time

User Support
1

Hello,
Is there any way to show flux variation with respect to time if depletion data are present (using openmc.deplete module)?

2

Hi Farshid,

After each transport simulation, the depletion module will write tally data to statepoint files, just like you would obtain from a single transport solution. These are named “openmc_simulation_n.h5”, where is the current time step. You can open each file using the StatePoint class. With one StatePoint instance per file (and each file at a unique point in time) you can view and plot tally data over time manually.

I hope this is helpful,

Andrew

3

Hi Andrew @andrewjohnson,

I am running into a similar problem. With the latest release 0.13.2, I tested a homogeneous fuel depletion. I did see openmc_simulation_n.h5 files at each step. However, I failed to read them with StatePoint. The error messages are:

reading statepoint file: openmc_simulation_n0.h5
Traceback (most recent call last):
File “/home/puran/openmc_job/run_pindep/…/Read_OpenMC_Tallies.py”, line 20, in
sp = openmc.StatePoint(statepoint, autolink=True)
File “/home/group_share/miniconda3/lib/python3.9/site-packages/openmc/statepoint.py”, line 150, in init
self.link_with_summary(su)
File “/home/group_share/miniconda3/lib/python3.9/site-packages/openmc/statepoint.py”, line 678, in link_with_summary
for tally in self.tallies.values():
File “/home/group_share/miniconda3/lib/python3.9/site-packages/openmc/statepoint.py”, line 372, in tallies
if self.tallies_present and not self._tallies_read:
File “/home/group_share/miniconda3/lib/python3.9/site-packages/openmc/statepoint.py”, line 446, in tallies_present
return self._f.attrs[‘tallies_present’] > 0
File “h5py/_objects.pyx”, line 54, in h5py._objects.with_phil.wrapper
File “h5py/_objects.pyx”, line 55, in h5py._objects.with_phil.wrapper
File “/home/group_share/miniconda3/lib/python3.9/site-packages/h5py/_hl/attrs.py”, line 56, in getitem
attr = h5a.open(self._id, self._e(name))
File “h5py/_objects.pyx”, line 54, in h5py._objects.with_phil.wrapper
File “h5py/_objects.pyx”, line 55, in h5py._objects.with_phil.wrapper
File “h5py/h5a.pyx”, line 80, in h5py.h5a.open
KeyError: “Can’t open attribute (can’t locate attribute: ‘tallies_present’)”

I used HDFView to open openmc_simulation_n0.h5 and found those tallies were there but no tally results were recorded. For your information, I attached the StatePoint files. The file “statepoint.150.h5” was obtained at the last time step and it could be read using openmc.StatePoint(‘statepoint.150.h5’) without a problem.

Thanks,
Puran

openmc_simulation_n0.h5 (39.6 KB)
openmc_simulation_n1.h5 (39.6 KB)
openmc_simulation_n2.h5 (39.6 KB)
openmc_simulation_n3.h5 (39.6 KB)
statepoint.150.h5 (450.5 KB)