I knew a Navy officer/physicist who was involved in a nuke explosion that was far greater than predicted and essentially dumped fallout all over his ship. He was an observer on a weather deck. I think a Japanese fishing vessel was likewise doused and one fisherman died from undeniable radiation sickness.

Anyway, the guy I knew was dying from a cancer in the early 1980's. He was certain it was related to the nuke but the VA denied it. My guy was still working on gathering evidence when the cancer killed him. End of story. Hoffman was his surname. Don't recall his given name.