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New thermodynamic model predicts plutonium solubility with iron

A hard-to-detect but stable form of iron helps convert subsurface plutonium from barely to very soluble, according to scientists at Pacific Northwest National Laboratory and Rai Enviro-Chem, LLC. Plutonium resides underground at weapons sites around the world.

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Presidential Commission Seeks Volunteers to Store U.S. Nuclear Waste

Nestled more than half a kilometer deep in a salt mine, the plutonium slowly decays, taking some 250,000 years to become uranium. As the U.S. debates what to do with the nuclear waste produced by its fleet of 104 reactors, the radioactive legacy of decades of nuclear bomb-making sits entombed in the U.S.

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New theory proposed to explain Pioneer probe gravitational anomaly

(PhysOrg.com) -- Portuguese physicists might have finally solved the decades old mystery of why the Pioneer probes, launched in the early 70’s, haven’t been decelerating from the Sun’s gravitational pull at the rate expected; it seems it might be something as mundane as adding in the tiny forces that occur when minute traces of heat from the plutonium on board the probes bounce off their receiving dishes, creating a counterforce, which in turn, causes the craft to slow; if ever so slightly.

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