Accessing data while looping through multiple runs

User Support
1

Hello all,
I am constructing a phase space of two different properties of a fuel salt that I am modelling. I need to vary density and composition of my material and loop through 49 different models to obtain 49 different eigenvalues and 49 different values of nu.
I can write a loop that will run as many times as I tell it to, however when I go into the statepoint file to obtain the eigenvalues it only records the data from the last run. I am assuming that this is because openmc auto names the statepoint file so it continuously overwrites itself. Would anyone know how to fix this? Thank you.

2

How about just renaming the statepoint after each iteration?

3

yes, that’s what I want to do but I am not sure how

4

Hello there!

We can change the working directory easily using

from openmc.utility_funcs import change_directory

then, just before we run the model,

with change_directory(working_path_to_iteration_n):
    openmc.run(....)
    # or
    model.run(....)

We often times can’t change the name of input/output, so change the directory is the best way to go.

Cheers!
Chris.