you know. for what you seem to imply is one of your first mods its not bad. i have a few suggestions for improvements and "balancing" if you're interested to hear them. feel free to consider them a challenge if you're up for it.

configs. a very common and useful thing many mods have. allowing factors such as heat output, energy output, fuel usage, etc, to be tweaked users can tune it to their preferences and play style. i imagine there will be adequate documentation and help available for implementing configs and will serve you well in current and future modding projects

radiation "germs" output. instead of outputting the typical radiation if it outputs the "radioactive contaminants it can serve as a balancing feature to require intelligent placement and infrastructure to avoid issues. its a low risk low return option but should still have some trade offs and this "toxicity" would provide that.

fallout. if the device overheats and takes too much damage it will break and convert to radioactive fallout. not a lot and without an explosion but about a tiles worth of the liquid. enough that its not game over but is still an inconvenient mess to clean up if you dont take care of it properly.