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1
Bulletin of the Atomic Scientists
Metallic uranium, vaporized by an electron beam, is illuminated with excitation
and ionization lasers as it passes through the dotted region, thereby selectively
ionizing the uranium-235 atoms. An electric field, E, then sweeps the uranium-
235 ...
If these new, secondary neutrons hit other nuclei of uranium-235, the fission is
repeated. Where there is only a small quantity of uranium- 235, a large proportion
of the new neutrons miss their targets, but it was calculated that if the mass of ...
Zhores A. Medvedev, Roy Aleksandrovich Medvedev, 2003
3
Glossary for the Worldwide Transportation of Dangerous Goods ...
ICAO 2-7.2, IATA App. A Unirradiated uranium shall mean uranium containing
not more than 2x103 Bq of plutonium per gram of uranium-235, not more than
9x106 Bq of fission products per gram of uranium-235 and not more than 5x10"3
g of ...
4
BUlletin of the Atomic Scientists
efficient as a once-through pressurized-water reactor — reactivity in fresh fuel
going to national reactors is supplemented as needed, at least in the early stages
, by makeup uranium-235. (This might be added as a feedstock at about 60 ...
5
The Fourth Source: Effects of Natural Nuclear Reactors
The meteorite uranium shows a marked reduction in concentration and an
unusual increase in uranium-235 content, as would result from an intense burst
ofneutrons in a nuclear detonation, by conversion of uranium-238 into plutonium-
239, ...
6
The Earth: Its Birth and Growth
It is as if a small-scale synthesis of elements occurs. Figure 3 shows the
measured values of the isotopic ratios of uranium ore in Oklo Mine. The isotopic
ratios of uranium-238 and uranium-235 vary widely by about 40 per cent, a
remarkable ...
7
The Code of Federal Regulations of the United States of America
grams uranium -235 grams plutonium grams uranium -233 (8) The transport must
be direct to Table III — Permissible Mass of Uranium-235 the consignee without
any inter- per Fissile Material Shipment Applicable mediate transit storage; and ...
8
Nuclear Wastelands: A Global Guide to Nuclear Weapons ...
Such plants produce low-enriched uranium for use in various power and military
reactors, and highly enriched uranium containing about 93.5 percent uranium-
235 for use in military weapons and 97.3 percent uranium-235 for U.S. naval ...
Arjun Makhijani, Howard Hu, Katherine Yih, 2000
9
Mine Wastes: Characterization, Treatment and Environmental ...
Uranium has three natural isotopes: uranium-238 (U-238); uranium-235 (U-235);
and uranium-234 (U-234); all of which are radioactive. The relative abundances
of U-238, U-235, and U-234 are 99.28%, 0.71%, and 0.006%, respectively ...
10
Energy Security Challenges for the 21st Century: A Reference ...
Because uranium-235 is far less abundant than uranium-238, reactor builders
and bomb makers have to work harder to fulfill their ambitions. In na- ture, only
0.711 percent of uranium is uranium-235 while 99.283 percent is uranium-238;
the ...
Gal Luft, Anne Korin, 2009
WIADOMOŚCI, KTÓRE ZAWIERAJĄ SŁOWO «URANIUM-235»
Sprawdź, o czym dyskutuje się w prasie krajowej i zagranicznej oraz jak jest stosowane słowo
uranium-235 w wiadomościach.
7 times the military lost nukes (and 4 times they were never found)
Since the plutonium pits were changed for lead pits used during training, the missing bomb has only a subcritical mass of uranium-235 and cannot cause a ... «We Are The Mighty, Maj 15»
West needs to rethink Iran nuclear deal
As a result, if the present Iranian regime remains in power, the capability to resume enrichment to greater than 20 percent in the uranium-235 isotope remains a ... «Chillicothe Gazette, Kwi 15»
The Factual Errors in John Bolton's "Bomb Iran!" Op-Ed in the New …
Uranium can be used as reactor fuel when enriched to 3-5 percent uranium-235, but it only becomes weapons-grade when enriched to about 90 percent. «The Intercept - First Look Media, Kwi 15»
High fission rate of AAP makes BARC consider it a replacement for …
High fission rate of AAP makes BARC consider it a replacement for Uranium-235. Published on April 2, 2015 by shridhar. BARC is considering AAP as a ... «Firstpost, Kwi 15»
Ayatollah Tells Air Force: We Enriched Uranium 20%; Commanders …
“LEU used in nuclear power reactors typically contains less than 5% uranium-235,” said CRS, “research reactor fuel can be made using 20% uranium-235; HEU ... «CNSNews.com, Mar 15»
Watch: Eons Ago, a Natural Nuclear Reactor Formed in Africa
Thus, the region held considerable amounts of uranium-235, some extra neutrons to split it, and just enough ground water to control the reaction and make sure ... «Softpedia, Sty 15»
2 billion-year-old African nuclear reactor proves that Mother Nature …
The most useful uranium isotope for nuclear power is uranium-235, which today accounts for just 0.7202% of any given natural sample of uranium. When the ... «ExtremeTech, Maj 14»
How do nuclear power plants work?
Natural uranium, which is relatively abundant, is a composite of two isotopes: It's 99.3 percent uranium-238 and .7 percent uranium-235. "A nuclear reactor can't ... «The Week Magazine, Lut 14»
Here's What 'Heavy Water' Is, And Why It Matters For Nuclear …
Uranium has two main naturally occurring isotopes — uranium-235, with 92 protons and 143 neutrons, and uranium-238, with 92 protons and 146 neutrons. «Business Insider, Lis 13»
Facts About Uranium
This radioactive metal is unique in that one of its isotopes, uranium-235, is the only naturally occurring isotope capable of sustaining a nuclear fission reaction. «LiveScience.com, Wrz 13»
