I can't reply to your PM, probably because I'm a new user. If you use reddit you can message me on the same username.

I don't know what MC means, but decay heat should just drop over time. Make it equal to 5%, and have it drop maybe 1% per day or something? (Actual would be around 1% after an hour)

I'm a Senior Reactor Operator in the US. I love that we are getting reactors. I see you want reactors to explode due to excessive power generation / demand mismatch! This is just some thoughts: In an actual power reactor, if the power grid did not have enough demand operators will start manually low...