
Bugorski was leaning over the equipment when he stuck his head in the path of the 76 GeV proton beam.
( , Mon 13 Jul 2020, 12:42, Reply)

Demon Core accident #1
As he withdrew his hand, he inadvertently dropped the brick onto the center of the assembly. Since the assembly was nearly in the critical state, the accidental addition of that brick caused the reaction to go immediately into the prompt critical region of neutronic behavior.
Demon Core accident #2
At 3:20 p.m., the screwdriver slipped and the upper beryllium hemisphere fell, causing a "prompt critical" reaction and a burst of hard radiation.[8] At the time, the scientists in the room observed the blue glow of air ionization and felt a heat wave.
Actually the whole story of the Demon Core is worth a read in terms of "things not to do with the business end of an atom bomb"
( , Mon 13 Jul 2020, 13:11, Reply)

I'm pretty amazed at how these guys were just manually interacting with almost-critical masses of this shit.
( , Mon 13 Jul 2020, 15:04, Reply)