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Terms apply. Welcome to Stuff You Missed in History Class, a production of I-Heart Radio.

Hello and welcome to the podcast.

I'm Tracy B. Wilson.

And I'm Holly Fry.

A few weeks ago, some friends of mine were having a totally normal conversation about

the demon core, specifically about demon core memes. We did an episode on the demon core in 2020,

and we just ran that as a Saturday classic, but in case you missed it, this is a plutonium

sphere made for use in a nuclear weapon that went on

to be used in criticality experiments, and it was involved in two different fatal accidents.

And one of those accidents, a physicist was using a screwdriver to position a reflector so that

the sphere would stay just below criticality.

And if you're thinking that sounds like a bad idea, you're right.

So in the course of this conversation, my friend Adrian, who was the same Adrian who suggested

an episode on the Demon Corps, said that she would love a deep dive into the SL1 reactor explosion.

And that threw me for a second because I thought we had talked about it in that

Demon Corps episode at the end where we talked about other nuclear incidents.

...