I tried deconstructing the reactors and heat pipe assembly and re-blueprinting, but the reactors just heat back up to around 605 and seem to stop.
Can someone tell me if I'm missing something?
I will attach the save.
Thank you so much.

UPDATE - Oh no... I seem to be getting an error uploading the save file (181.5 MB) is there an alternative location to share? Guess I'll share the error instead.