plutonium-239

(redirected from Pu-239)

plutonium-239

[plü′tō·nē·əm ¦tü‚thər·dē′nīn]
(nuclear physics)
A synthetic isotope chemically similar to uranium and neptunium; atomic number 94; made by bombardment of uranium-238 with slow neutrons in a nuclear reactor; used as nuclear reactor fuel and an ingredient for nuclear weapons.
References in periodicals archive ?
CIELO starts with a pilot launched by the OECD- NEA addressing a small number of high priority nuclides: H-1, O-16, Fe-56, U- 235, U-238, Pu-239.
The total exposure dose rate of reference organisms resulting from ionising radiation of technogenic radionuclides in Lake Druksiai Insect larvae H-3, Pu-239 <1% Cs-137 40% Cs-134 1% C-14 2% Mn-54 4% Co-60 42% Sr-90 10% Vascular plant H-3, Pu-239 <1% Cs-137 40% Cs-134 1% C-14 2% Mn-54 4% Co-60 43% Sr-90 9% Crustacean H-3, Pu-239 <1% Cs-137 40% Cs-134 1% C-14 3% Mn-54 4% Co-60 41% Sr-90 1% Gastropod H-3, Pu-239 <1% Cs-137 38% Cs-134 1% C-14 4% Mn-54 4% Co-60 46% Sr-90 6% Note: Table made from pie chart.
According to Cosmos magazine: "Unlike U-235 and Pu-239, no matter how much thorium you pack together, it will not start splitting atoms and blow up.
The type of plutonium in the bottle - known as Pu-239 - is a so-called alpha emitter.
Mixtures with considerably less Pu-239 than weapons-grade can in principle be made into a weapon, but they generate much radiation and heat, making weapons harder to build reliably.
Due to the advanced types of reactors proposed for building under this program, the overall amount of fuel available for consumption actually increases with each cyclical iteration, due to the transmutation of U-238 into burnable Pu-239 in the reactor core (DOE, 2007.
Thus Ken Kalfus writes a terrific, bleakly beautiful first novel (following 1998's Thirst and 1999's Pu-239, both collections, both great) that will effectively end up choir-preaching to the majority of its audience and go ignored by those most in need of its message.
Of the 175 cases of nuclear materials trafficking reported by the International Atomic Energy Agency (IAEA) between 1993 and 2001, only 17 involved U-238 or Pu-239.
How much longer before we hear that Pu-239 decays in 1,000 years?
8) provides a high fissile material production rate, which converts fertile U-238 to fissile Pu-239.
In all, there were under 10 grammes of Pu-239 with a purity of 99.