https://github.com/tomdodd4598/NuclearCraft/blob/1.12.2o/src/main/java/nc/recipe/RecipeHelper.java#L286
TechReborn's fluids are too easy to obtain and I didn't find the configuration to disable NCO machines to accept them.

Added enable_fluid_recipe_expansion config in the processor category - the first boolean is for Mek fluids and the second is for TechReborn :)