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  2. Spent nuclear fuel - Wikipedia

    en.wikipedia.org/wiki/Spent_nuclear_fuel

    About 1% of the mass is 239 Pu and 240 Pu resulting from conversion of 238 U, ... and need to be reprocessed because long-term storage and ... This page was last ...

  3. Plutonium-238 - Wikipedia

    en.wikipedia.org/wiki/Plutonium-238

    Plutonium-238 (238 Pu or Pu-238) is a radioactive isotope of plutonium that has a half-life of 87.7 years.. Plutonium-238 is a very powerful alpha emitter; as alpha particles are easily blocked, this makes the plutonium-238 isotope suitable for usage in radioisotope thermoelectric generators (RTGs) and radioisotope heater units.

  4. Uranium-238 - Wikipedia

    en.wikipedia.org/wiki/Uranium-238

    In a fission nuclear reactor, uranium-238 can be used to generate plutonium-239, which itself can be used in a nuclear weapon or as a nuclear-reactor fuel supply. In a typical nuclear reactor, up to one-third of the generated power comes from the fission of 239 Pu, which is not supplied as a fuel to the reactor, but rather, produced from 238 U. [5] A certain amount of production of 239

  5. Uranium tailings - Wikipedia

    en.wikipedia.org/wiki/Uranium_tailings

    The tailings contain mainly decay products from the decay chain involving Uranium-238. [1] Uranium tailings contain over a dozen radioactive nuclides, which are the primary hazard posed by the tailings. The most important of these are thorium-230, radium-226, radon-222 (radon gas) and the daughter isotopes of radon decay, including polonium-210.

  6. Weapons-grade nuclear material - Wikipedia

    en.wikipedia.org/wiki/Weapons-grade_nuclear_material

    Initially only about 0.7% of it is fissile U-235, with the rest being almost entirely uranium-238 (U-238). They are separated by their differing masses. Highly enriched uranium is considered weapons-grade when it has been enriched to about 90% U-235. [citation needed] U-233 is produced from thorium-232 by neutron capture. [19]

  7. Does Salt Expire? Technically No, But You Should Ideally Use ...

    www.aol.com/does-salt-expire-technically-no...

    How to Store Salt to Max Out Its Fresh Shelf Life. Dr. Schaffner and Brekke agree that the best way to store salt is in a cool, dry, dark place at a distance from where you cook. This will protect ...

  8. How long you should keep your car insurance records - AOL

    www.aol.com/finance/long-keep-car-insurance...

    Keep this card as long as the policy term is valid, either in your wallet, glove compartment or center console or as a digital file you can easily access on your smartphone. The declarations page ...

  9. Plutonium - Wikipedia

    en.wikipedia.org/wiki/Plutonium

    [57] [58] Finally, exceedingly small amounts of plutonium-238, attributed to the extremely rare double beta decay of uranium-238, have been found in natural uranium samples. [ 59 ] Due to its relatively long half-life of about 80 million years, it was suggested that plutonium-244 occurs naturally as a primordial nuclide , but early reports of ...