Nuclear weapons interfere with carbon dating park gahee dating

Such brief irradiation is quite inefficient for power production, so in power reactors the fuel is left in the reactor much longer, resulting in a mix that includes more of the higher isotopes of plutonium ("reactor grade" plutonium).Normally for electrical power production the uranium fuel remains in the reactor for three to four years, which produces a plutonium of 60 percent or less Pu-239, 25 percent or more Pu-240, 10 percent or more Pu-241, and a few percent Pu-242.

Higher concentrations of Pu-240 can result in pre-detonation of the weapon, significantly reducing yield and reliability.It is this plutonium isotope that is most useful in making nuclear weapons, and it is produced in varying quantities in virtually all operating nuclear reactors.Plutonium containing high quantities of fissile material i.e.Pu-239 in the order of 90-95 %, is known as weapon-grade plutonium.Plutonium containing lower concentrations, in the range of 50-60 % is known as reactor-grade plutonium.

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