It might work - I don't support it. Here's why: Kerbalism replaces every single functional component I have made with its own version that hooks into its own systems, which function differently, have different balances and who knows what else. If you install NFE and Kerbalism, you are getting Kerbalism's reactor mechanics. I don't know what those are and don't maintain the code so I can't support them from my end.  quick edit - yes, confirmed that Kerbalism replaces NFE reactor modules with