The Stationary Low-Power Plant Number 1 was a small boiling-water reactor built at the National Reactor Testing Station, west of Idaho Falls, Idaho. On January 3, 1961, during a restart of the reactor, a catastrophic tragedy unfolded when the reactor went supercritical.
Research:

Elizabeth Bisland, Beyond the Trip Around the World
42:54

SYMHC Classics: Marie Laurencin
32:46

Behind the Scenes Minis: Censorship Cats
26:59