Come on. Roll a six, Penny dies horribly
in a NUCLEAR meltdown.
The Big Bang Theory Season 3, Episode 7
I'm worried about Sheldon someday
setting off a low-yield NUCLEAR device...
The Big Bang Theory Season 4, Episode 3
at the Hubei Institute
for Nuclear Physics
The Big Bang Theory Season 7, Episode 6
the calculation
of NUCLEAR matrix elements.
The Big Bang Theory Season 7, Episode 20
...and tried to build
a NUCLEAR reactor in the tool shed.
The Big Bang Theory Season 8, Episode 23