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Fix config change not propagating through to decay energies #2825

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merged 1 commit into from Jan 11, 2024

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gridley
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@gridley gridley commented Jan 9, 2024

Description

Changing the openmc.config chain file was not propagating through to changing the DECAY_ENERGIES variable, giving incorrect results if a user wished to compare decay heats between two chains.

For example, I was trying to assess how much error the CASL decay chain introduced compared to the full ENDF chain. I was finding some strange results, with decay heat far below 7% for a PWR pin cell.

Fixes #2824

Also ran autopep8 on config.py.

Before this change (wrong)

image

After this change (right, expected 7% decay heat)

image

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@paulromano paulromano left a comment

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Thanks @gridley!

@paulromano paulromano merged commit cc15f5e into openmc-dev:develop Jan 11, 2024
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_DECAY_ENERGIES not cleared when changing chain in openmc.config
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