SEARCH Articles Figures Tables Fission plutonium Nuclear fission plutonium Nuclear fission plutonium fuel Plutonium fissionability Plutonium fissionability Plutonium isotopes, fissionable Plutonium spontaneous fission Plutonium spontaneous fission decay Plutonium-239, fission cross-section Procedure 6. Separation of Plutonium from Uranium and Fission Products in Irradiated Reactor Targets