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2. Zippe-type centrifuge - Wikipedia

   en.wikipedia.org/wiki/Zippe-type_centrifuge

   To calculate the total enrichment in a countercurrent centrifuge of height H, one has to add a factor of H/(R√2) in the exponent. According to Glaser, [ 3 ] early centrifuges had rotor diameters of 7.4 to 15 cm and lengths of 0.3 to 3.2 m, and the peripheral speed was 350 to 500 m/s.

3. Weapons-grade nuclear material - Wikipedia

   en.wikipedia.org/wiki/Weapons-grade_nuclear_material

   This makes plutonium unsuitable for use in gun-type nuclear weapons. To reduce the concentration of Pu-240 in the plutonium produced, weapons program plutonium production reactors (e.g. B Reactor) irradiate the uranium for a far shorter time than is normal for a nuclear power reactor.

4. Pressurized heavy-water reactor - Wikipedia

   en.wikipedia.org/wiki/Pressurized_heavy-water...

   Because of this, a light-water reactor will require that the 235 U isotope be concentrated in its uranium fuel, as enriched uranium, generally between 3% and 5% 235 U by weight (the by-product from this process enrichment process is known as depleted uranium, and so consisting mainly of 238 U, chemically pure).

5. Plutonium-239 - Wikipedia

   en.wikipedia.org/wiki/Plutonium-239

   Weapons-grade plutonium is defined as containing no more than 7% 240 Pu; this is achieved by only exposing 238 U to neutron sources for short periods of time to minimize the 240 Pu produced. Plutonium is classified according to the percentage of the contaminant plutonium-240 that it contains: Supergrade 2–3%; Weapons grade 3–7%; Fuel grade ...

6. When telling the history of plutonium, tell the full story ...

   www.aol.com/news/telling-history-plutonium-tell...

   Letters to the editor on the history of plutonium, Project 2025, ageism on the Benton Commission, Trump, syphilis, drug laws and Hanford. | Opinion

7. Plutonium hexafluoride - Wikipedia

   en.wikipedia.org/wiki/Plutonium_hexafluoride

   It sublimes around 60 °C with heat 12.1 kcal/mol to a gas of octahedral molecules [2] with plutonium-fluorine bond lengths of 197.1 pm. [14] At high pressure, the gas condenses, with a triple point at 51.58 °C and 710 hPa (530 Torr); the heat of vaporization is 7.4 kcal/mol. [13] At temperatures below -180 °C, plutonium hexafluoride is ...

8. Extra Credits - Wikipedia

   en.wikipedia.org/wiki/Extra_Credits

   The first one was Extra Credits: Firefall, which spanned 5 episodes and was requested by Red 5 Studios to help reinforce the game design decisions in their video game Firefall. [ 34 ] After moving to YouTube, the team decided to make use of their space to expand their channel with new series running on different days of the week.

9. Plutonium–gallium alloy - Wikipedia

   en.wikipedia.org/wiki/Plutonium–gallium_alloy

   However, plutonium can be stabilized in the δ phase by alloying it with a small amount of another metal. The preferred alloy is 3.0–3.5 mol.% (0.8–1.0 wt.%) gallium. Pu–Ga has many practical advantages: [1] stable between −75 and 475 °C, very low thermal expansion, low susceptibility to corrosion (4% of the corrosion rate of pure ...