Adding temperature dependence when generating cross sections

[onufer]

What is the change?

Add temperature dependent capability to armi when generating cross sections

Why is the change being made?

to be able to group similar temperature blocks for representative block construction

---

Checklist

• This PR has only one purpose or idea.
• Tests have been added/updated to verify any new/changed code.

• The code style follows good practices.
• The commit message(s) follow good practices.

• The release notes have been updated if necessary.
• The documentation is still up-to-date in the doc folder.
• The dependencies are still up-to-date in pyproject.toml.

[john-science]

So, this function didn't have any unit tests in ARMI yet? Damn.

[jakehader]

Is this only for homogeneous compositions or does it also work with other modeling options as well?

[jakehader]

I'd guess it's independent of the treatment since this occurs in the XS group manager rather than specific modeling options applied for the input generation. Also, I assume that U238 is selected here because of fuel, but does this work if you select an isotope that isn't in the composition? For example if the isotope is not in the block, does this fail, should it fail, or should the environment/temperature group never be updated?

[onufer]

works for other based my expected implementation and on Mikes testing.

[john-science]

Approved.

This is a non-trivial re-write of xsgm.py, so we very much should run the full suite of downstream testing before merging.

And this is an API-breaking change, so downstream PRs will be necessary.

[mgjarrett]

Suggested change

	def getBlocks(includeAll=True):
	return self.blockList
	core.getBlocks = getBlocks
	for b in core.getBlocks():
	print(b)

Unless I'm missing something, it looks like this was just used while developing the test

[onufer]

no, if you dont do this, xsgm does all blocks in the core rather than just the block list, and you cannot do hand calcs to compare correct grouping. i would remove all blocks except those from the core, but i might have partial assemblies...