U238 or U-238 may be: German submarine U-238, a German World War II U-boat (submarine) Uranium-238 (U-238 or 238U), the most common isotope of uranium...

The Gilbert U-238 Atomic Energy Lab is a toy lab set designed to allow children to create and watch nuclear and chemical reactions using radioactive material...

German submarine U-238 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine built for service in the Second World War. She was laid down on 21 April...

Uranium-238 (238U or U-238) is the most common isotope of uranium found in nature, with a relative abundance of 99%. Unlike uranium-235, it is non-fissile...

Surrounded by a U-238 reflector/tamper, the Fat Man's pit was brought close to critical mass by the neutron-reflecting properties of the U-238. During detonation...

at zero): 234 U / 238 U = 1 + A × 2 − t / 245000 {\displaystyle ^{234}{\text{U}}/^{238}{\text{U}}=1+A\times 2^{-t/245000}} 230 Th / 238 U = 1 + A 1 − 75000...

is stable): U 238 ⟶ Th 234 ⏟ daughter   of   238 U ⟶ Pa 234 m ⏟ granddaughter   of   238 U ⟶ ⋯ ⟶ Pb 206 ⏞ decay   products   of   238 U {\displaystyle...

of proliferation). Fissile U-235 and non-fissile but fissionable and fertile U-238 are both used in the fission process. U-235 is fissionable by thermal...

isotopes: uranium-238 (U-238), accounting for 99.3% and uranium-235 (U-235) accounting for about 0.7%. U-238 has 146 neutrons and U-235 has 143 neutrons...

uranium with U-235 levels usually above 90%, suitable for nuclear weapons. The uranium in yellowcake is almost exclusively (>99%) U-238, with very low...

only moderately enriched with U-235 relative to U-238, so the U-238 continues to serve as a denaturation agent for any U-235 produced by plutonium decay...

primarily of two isotopes U-238 and U-235, with 99.28% of the metal being U-238 while 0.71% is U-235, and the remaining 0.01% is mostly U-234. The number in...

was powered by two AEG GU 460/8-276 (except in U-45, U-46, U-49, U-51, U-52, U-54, U-73 to U-76, U-99 and U-100, which retained the BBC motor of the VIIA)...

cause subsequent fission of 238 U , so fission of 238 U does not sustain a nuclear chain reaction. Fast fission of 238 U in the secondary stage of a thermonuclear...

age of the Earth. The most common isotopes in natural uranium are uranium-238 (which has 146 neutrons and accounts for over 99% of uranium on Earth) and...

generate much, or even most, of their yields from fission. Although the U-238 isotope of uranium will not sustain a chain reaction, it still fissions...

primarily of the unconsumed remains of the original fuel (typically U-235, U-238, and/or Pu-239). The fuel is first dissolved in nitric acid at a concentration...

Plutonium-238 (238Pu or Pu-238) is a radioactive isotope of plutonium that has a half-life of 87.7 years. Plutonium-238 is a very powerful alpha emitter;...

fuels are U-233, U-235 and Pu-239. The second type of fuel is called fertile. Examples of fertile fuel are Th-232 (mined thorium) and U-238 (mined uranium)...

German submarine U-995 is a Type VIIC/41 U-boat of Nazi Germany's Kriegsmarine. She was laid down on 25 November 1942 by Blohm & Voss in Hamburg, Germany...

uranium enrichment, relying on the slight mass difference between atoms of U-238 and U-235 in uranium hexafluoride gas. In a liquid suspension, many particles...

(primarily as a product of alpha decay of 238 U—because the half-life of 238 U is much larger than that of 234 U, it is be produced and destroyed at the...

is U-238, while approximately 0.72% is U-235, fissile by thermal neutrons, and the remaining 0.0055% is U-234. If natural uranium is enriched to 3% U-235...

"media overview" material and technical details: "assembly containing only U-238 (or natural uranium, or nuclear waste) and positioned near an existing nuclear...

is dependent upon the alpha decay energy. A pleochroic halo formed from U-238 has theoretically eight concentric rings, with five actually distinguishable...

land in Tokyo commercial districts in 1984 was 1,333,000¥ (U$5,600 assuming in 1984 that 1 U$=238¥). In just a year, the average price per 1 sq. meter for...

Initially only about 0.7% of it is fissile U-235, with the rest being almost entirely uranium-238 (U-238). They are separated by their differing masses...

industry that refers to the isotopes of plutonium (239 Pu) uranium (235 U, 238 U) and thorium (232 Th) present in nuclear fuel, as opposed to the minor...

neutrons from a fusion reactor to trigger fission in non-fissile fuels like U-238 or Th-232. Each neutron can trigger several fission events, multiplying...

(radioelement) with no stable isotopes. It has two primordial isotopes, uranium-238 and uranium-235, that have long half-lives and are found in appreciable quantity...