# Decay calculations

**URL:** <https://openmc.discourse.group/t/decay-calculations/952>\
**Category:** User Support\
**Created:** [January 18, 2021, 10:55am UTC](https://openmc.discourse.group/t/decay-calculations/952 "2021-01-18T10:55:21Z")\
**Posts on this page:** 1\
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**Author:** ![emilio.castro](https://avatars.discourse-cdn.com/v4/letter/e/b38774/32.png) [@emilio.castro](https://openmc.discourse.group/u/emilio.castro)\
**Post date:** [January 18, 2021, 10:55am UTC](https://openmc.discourse.group/t/decay-calculations/952/1 "2021-01-18T10:55:21Z")

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Hello.

I am testing the depletion capabilities of version 0.12, and I am wondering if it possible to perform decay-only steps between criticality calculations. With “decay only” I mean that only natural decay of the isotopes happens, and no fission or transmutation of any other kind take place, so this should be independent of the flux or power.

Thanks in advance.

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