you are probably building them close together and the ambient heat from one reactor is overheating the new ones
Viewing post in Person without PhD in Nuclear Physics Here
Could there be a delete button? either to add or to tell us about. I sometimes put down pipes on accident and have to use reactors to b low them up or just leave them to be an eyesore, if possible could you add a grid as well it is sort of the problem, I can't tell where I'm going to place something exactly so I screw it up then I have to explode the entire system I just built.