Plutonium

In-situ plutonium production also contributes to the neutron chain reaction in other types of reactors after sufficient plutonium-239 has been produced, since plutonium-239 is also a fissile element which serves as fuel.

On the other extreme, separation of fissile plutonium-239 from the common impurity plutonium-240, while desirable in that it would allow the creation of gun-type nuclear weapons from plutonium, is generally agreed to be impractical.

Plutonium-based weapons use plutonium produced in a nuclear reactor, which must be operated in such a way as to produce plutonium already of suitable isotopic mix or grade.

Plutonium research LLNL conducts research into the properties and behavior of plutonium to learn how plutonium performs as it ages and how it behaves under high pressure (e.

The longer the plutonium remained irradiated inside a reactor—necessary for high yields of the metal—the greater the content of the plutonium-240 isotope, which undergoes spontaneous fission at thousands of times the rate of plutonium-239.

The Atomic Energy Commission's first task: Work with Dupont (the company that operated the first plutonium production plant: Hanford in Washington State) to find a site to make more plutonium and tritium for the hydrogen bomb.

The recent exposure to LANL workers from a breach in a plutonium glove box is foreshadowing of things to come with the proposed plutonium pit factory at the facility.

Contrary to popular perception, Pakistan did not forego the "plutonium" route and covertly continued its indegenious research under Munir Khan and it succeeded with plutonium route in the early 1980s.

Implosion methods needed to be developed for uranium in place of the wasteful gun method, and composite uranium-plutonium cores were needed now that plutonium was in short supply because of the problems with the reactors.

Initial research on the properties of plutonium was done using cyclotron-generated plutonium-239, which was extremely pure, but could only be created in very small amounts.

The burnt fuels are thorium with reactor-grade plutonium (RGPu), thorium with weapons-grade plutonium (WGPu) and Mixed Oxide fuel (MOX).

The entire 50 kg, along with some 50%-enriched, averaging out to about 85% enriched, were used in Little Boy Plutonium The second line of development pursued by the Manhattan Project used the fissile element plutonium.

The large stock of plutonium is a result of its production inside uranium-fueled reactors and of the reprocessing of weapons-grade plutonium during the weapons program.

The mix of isotopes in reprocessed plutonium is not attractive for weapons, but can be used as fuel (instead of being simply nuclear waste), while burning weapons-grade plutonium eliminates a proliferation hazard.

The plutonium-240 would start the chain reaction too quickly, causing a predetonation that would release enough energy to disperse the critical mass with a minimal amount of plutonium reacted (a fizzle ).

Traces of plutonium in uranium minerals were first found in 1942, and the more systematic results on 239 Pu are summarized in the table (no other plutonium isotopes could be detected in those samples).

Traces of primordial plutonium -244 may still exist in nature, citation but this does not occur in quantity, unlike thorium and uranium, and is swamped by the much larger amount of plutonium produced artificially.

Working with the minute quantities of plutonium available at the Metallurgical Laboratory in 1942, a team under Charles M. Cooper developed a lanthanum fluoride process for separating uranium and plutonium, which was chosen for the pilot separation plant.

Due to the need to continually cool the ferociously radioactive melted uranium/plutonium fuel cores, follow-on collection of the highly contaminated wastewater will continue indefinitely.

Nuclear bombs, tested in the atmosphere, spewed out plutonium which settled on the ground in easily detectable amounts.