K-25 was the Manhattan Project codename for the program that produced
enriched uranium for atomic bombs using the gaseous diffusion method at
the Clinton Engineer Works in Oak Ridge, Tennessee, in the United
States. When the production facility was built in 1944, the four-story
gaseous diffusion plant (pictured) was the world's largest building,
with over 152,000 square metres (1,640,000 sq ft) of floor space. At
the height of construction, over 25,000 workers were employed on the
site. Slightly enriched uranium from the S-50 thermal diffusion plant in
the form of the highly corrosive uranium hexafluoride was fed into the
K-25 gaseous diffusion plant; its product in turn was fed into the Y-12
electromagnetic plant. The enriched uranium was used in the Little Boy
atomic bomb used in the atomic bombing of Hiroshima. Production of
enriched uranium ended in 1964, gaseous diffusion ceased in 1985, and
demolition of the facility was completed in 2017. (This article is part
of a featured topic: History of the Manhattan Project.) .
Today's selected anniversaries:
Spanish friar Junípero Serra founded Mission San Diego de
Alcalá, the first Franciscan mission in the Alta California region of
Ethiopian emperor Haile Selassie signed the nation's first
constitution, intended to officially replace the Fetha Nagast, which had
been the supreme law since the Middle Ages.
Korean War: A Korean People's Army unit massacred thirty-one
U.S. Army prisoners of war.
An earthquake of magnitude 6.6 MW struck Niigata Prefecture,
Japan, causing a leak of radioactive gases from the Kashiwazaki-Kariwa
Nuclear Power Plant.
Wiktionary's word of the day:
1. An elastic band worn to keep a glove from slipping off the wrist.
2. A decorative band or bracelet that encircles the wearer's wrist;
especially, a closely knitted one to keep it warm; a muffetee.
3. A small handbag with a short strap for attaching it to the wearer's
4. A handcuff.
Wikiquote quote of the day:
I'll be all right. I'm just going through a phase right now.
Everybody goes through phases and all, don't they?
--The Catcher in the Rye
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