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2. Plutonium-239 - Wikipedia

   en.wikipedia.org/wiki/Plutonium-239

   239 Pu has a higher probability for fission than 235 U and a larger number of neutrons produced per fission event, so it has a smaller critical mass. Pure 239 Pu also has a reasonably low rate of neutron emission due to spontaneous fission (10 fission/s·kg), making it feasible to assemble a mass that is highly supercritical before a detonation ...

3. Isotopes of plutonium - Wikipedia

   en.wikipedia.org/wiki/Isotopes_of_plutonium

   239 Pu is virtually nonexistent in nature. It is made by bombarding uranium-238 with neutrons. Uranium-238 is present in quantity in most reactor fuel; hence 239 Pu is continuously made in these reactors. Since 239 Pu can itself be split by neutrons to release energy, 239 Pu provides a portion of the energy generation in a nuclear reactor.

4. Reactor-grade plutonium - Wikipedia

   en.wikipedia.org/wiki/Reactor-grade_plutonium

   In contrast, the generic civilian Pressurized water reactor, routinely does (typical for 2015 Generation II reactor) 45 GWd/tU of burnup, resulting in the purity of Pu-239 being 50.5%, alongside a Pu-240 content of 25.2%, [5] [6] The remaining portion includes much more of the heat generating Pu-238 and Pu-241 isotopes than are to be found in ...

5. Weapons-grade nuclear material - Wikipedia

   en.wikipedia.org/wiki/Weapons-grade_nuclear_material

   Pu-239 is produced artificially in nuclear reactors when a neutron is absorbed by U-238, forming U-239, which then decays in a rapid two-step process into Pu-239. [22] It can then be separated from the uranium in a nuclear reprocessing plant. [23] Weapons-grade plutonium is defined as being predominantly Pu-239, typically about 93% Pu-239. [24]

6. Fission products (by element) - Wikipedia

   en.wikipedia.org/wiki/Fission_products_(by_element)

   Fission product yields by mass for thermal neutron fission of U-235 and Pu-239 (the two typical of current nuclear power reactors) and U-233 (used in the thorium cycle). This page discusses each of the main elements in the mixture of fission products produced by nuclear fission of the common nuclear fuels uranium and plutonium.

7. Canada's Trudeau returns home after Trump meeting without ...

   www.aol.com/canadas-trudeau-says-had-excellent...

   Canadian Prime Minister Justin Trudeau returned home Saturday after his meeting with Donald Trump without assurances the president-elect will back away from threatened tariffs on all products from ...

8. Radioactive contamination from the Rocky Flats Plant

   en.wikipedia.org/wiki/Radioactive_contamination...

   One of four example estimates of the plutonium (Pu-239) plume from the 1957 fire at the Rocky Flats nuclear weapons plant. The Rocky Flats Plant, a former United States nuclear weapons production facility located about 15 miles (24 km) northwest of Denver, caused radioactive (primarily plutonium, americium, and uranium) contamination within and outside its boundaries. [1]

9. Colorado star Travis Hunter 'for sure' heading to NFL in 2025

   www.aol.com/sports/colorado-star-travis-hunter...

   Colorado star Travis Hunter is heading to the NFL in 2025. The defensive back and wide receiver put the obvious on the record in a news conference with reporters on Thursday and said that the 2024 ...