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New Production of Plutonium 238
Saeed al-Sahaf writes "According to the New York Times (login req, but you can google for it as well), the Bush administration is planning the government's first production of plutonium 238 since the cold war. Federal officials say the program would produce a total of 330 pounds over 30 years at the Idaho National Laboratory. Officials denied that any of the classified missions would involve nuclear arms, satellites or weapons in space, but rather would power 'secret espionage devices.' Plutonium 238 has no central role in nuclear arms. Instead, it is valued for its steady heat, which can be turned into electricity. Nuclear batteries made of it are best known for powering spacecraft that go where sunlight is too dim to energize solar cells. For instance, they now power the Cassini probe exploring Saturn and its moons."
http://www.nytimes.com/2005/06/27/politics/27nuke. html?ex=1277524800&en=d2a4c8d306596edf&ei=5090&par tner=rssuserland&emc=rss
From TFA "The Idaho National Laboratory, founded in 1949 for atomic research, stretches across 890 square miles of southeastern Idaho... The site is dotted with 450 buildings and 52 reactors... New plutonium facilities there would take five years to build and cost about $250 million."
330lbs sounds like a lot, but its probably about the size of a 12 pack of coke.
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330 pounds of plutonium occupies a volume of about 7.5 liters.
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Wikipedia article here
Plutonium 239 is the one used in nuclear weapons and some nuclear power plants. Pu238 has a halflife of 88 years, and the decay mode is fission (so it outputs quite a lot of energy) or alpha emission. Quoth the wiki:
"The plutonium isotope 238Pu is an alpha emitter with a half-life of 87 years. These characteristics make it well suited for electrical power generation for devices which must function without direct maintenance for timescales approximating a human lifetime. It is therefore used in RTGs such as those powering the Galileo and Cassini space probes; earlier versions of the same technology powered seismic experiments on the Apollo Moon missions.
238Pu has been used successfully to power artificial heart pacemakers, to reduce the risk of repeated surgery. It has been largely replaced by lithium-based batteries recharged by induction, but as of 2003 there were somewhere between 50 and 100 plutonium-powered pacemakers still implanted and functioning in living patients."
Those 238's before the Pu's are supposed to be superscripted, but slashdot doesn't think that's good enough, apparently.
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