[brivette]

do you know where the term scram originated?

[JEH_Boston]

It is said to come from “Safety Control Rod Axe Man” back before automatic control systems... ...if you wish to see the rest of the story see:
http://www.nrc.gov/reading-rm/basic-ref/glossary/scram.html

[Ratman83]

Try here

http://www.ornl.gov/info/reporter/no19/scram.htm

[chimera]

Follow-up trivia for double-or-nothing:

Who was the first SCRAM (on CP-1)?