I'd be more inclined to blame chemical carcinogens in that case. Old electrical equipment used things like PCBs in capacitors and transformers, and beryllium ox

I'd be more inclined to blame chemical carcinogens in that case. Old electrical equipment used things like PCBs in capacitors and transformers, and beryllium oxide thermal compound. Military organizations are sometimes exempt from civilian safety regulations and they are understandably willing to take long term safety risks if it reduces the risk of short term catastrophic failure. There could also be contamination there that pre-dates understanding of the danger. Even if the cancer cluster is real, I wouldn't consider non-ionizing radiation until I'd ruled out all the known carcinogens.