Looking for information on this NOTAM Potential loss of life Radiation Hazard

[Halfswede]

Yeah I don't follow these notices enough except on one podcast where the vast majority of these are space operations or airshows. It's first time Ive ever seen radiation or potential loss of life mentioned

I have followed various other tests at Kwaj and at sea, so I can say with some confidence that it is normal.  It does sound scary though and that is because it could be serious and quick.  Birds that fly in the directed beam of a decent radar will not fare well, so it's still very prudent to keep people from doing the same thing. This one seemed to be focused on planes approaching the island rather than very far away or at high altitude.

Think of it like a "don't look at the laser" warning. You are basically fine around it until you are facing the wrong direction for a second and you aren't, so the language is serious.