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CRUD: "...an acronym for 'Chalk River Unidentified Deposits.' ...black, highly radioactive substances found on the inside of piping and components at the Chalk River nuclear reactor ... CRUD has now become a standard industry term referring to minute, solid, corrosion products that travel into the reactor core, become highly radioactive, and then flow out of the reactor into other systems in the plant. ... CRUD can settle out in crevices or plate-out on the inside of piping in considerable quantities ... The major components of CRUD are iron, cobalt, chrome, and manganese ... CRUD is a concentrated source of radiation and represents a significant radiological risk because of its insolubility." (United States Federal Energy Regulatory Commission, Testimony of James K. Joosten, September 15, 1997, pg. 13-14)
The reactor is full of Crud
crud by Hamishr January 17, 2007
Related Words
DC Metro Slang

to be messed up or f-cked up.
My boyfriend was supposed to come over tonight, but then he went out with his friends. That's crud.
crud by Ashley Dunlap March 20, 2007
subsitute for the word crap, or something described as crusty and nasty
"crud.. i lost my dollar"
"damn crudy earwax"
crud by Dawn October 7, 2002
A nicer way to say not-so-nice things.
OR
Some kind of gook that appears in a strange place.
Holy Crud, he stole my cap!, Crud, my nose hurts.
OR
EW! There's some funky crud in here!
crud by Kerrie July 4, 2004
A slang term for a common cold that makes your body hurt, joints ache, makes your head swim, and just makes you feel like utter crap.
Brenda gave me the crud. Now I'm gonna be stuck in bed for 5 days.
crud by OldFart1780 April 23, 2007
What one says when one is afraid to say crap.
Person 1: *hits person 2*
Person 2: Holy - er.... crud!
Crud by bat_hero August 29, 2009