i think that some strong machines and nuclear reactors should have radiaton method: When you are standing infront of machines for long time or carry uranium in inventory you'll lose health after a while Unless you wear radiation proof suit (Duarbility gets lower when you are standing near the radiation making blocks) .
and another idea: Fire Detector
since HV sometimes procduce fire it can cause fire to spread to wooden items.
this Rstone powerd machine sends a signal to your distant room and alrets you about the fire
EDIT: and another idea: Steel
Crafted using iron and coal dusts,stonger than iron and used for tools armor and maybe some new machines.
Another idea: Nuclear Batteries
Nuclear batteries: Crafted similar to single use battaries And stronger than Recharged batteries but procduce radiation (as written above)
P.S Sorry if there are any Grammar mistakes