I've tested the reactor now in beyond reality now and it seems to work flawlessly. It takes a while before the reactor reaches its full output which it seems to do at about 1% hull heat. Then the output varies between rougly 1332 and 1352. Ive let it run for about 15 minutes and it does not seem to encounter any problems.
Edit:
I've let it run for one and a half cycle now, no problem whatsoever. Think its safe to say that it's completly safe ![]()
This will likely be my reactor of choice for future for gregtech, vanilla reactors can't really compete. I will probably add the thorium reactor aswell just to have a use for it.