What does U-238 stand for?

In addition, much of the larger part of uranium, Uranium-238, which cannot split, grabs on to neutrons and turns into Plutonium-239, the most radioactive substance known.

When one says that uranium-238 has a half-life of 4.

Most nuclear reactors today are light water reactors (LWR), cooled by water and fueled by uranium-238, or U-238 (the most common naturally occurring uranium isotope) and 4% to 5% U-235.

The odourless and tasteless gas is generated by decay of uranium-238 (a natural radioactive element present in all rocks and soil in varying degrees).

In either the generation of electricity or the creation of a nuclear weapon, natural uranium ore must be refined and enriched to increase the number of fissile (and rare) uranium-235 isotopes, or plutonium must be created by bombarding common uranium-238 isotopes with neutrons and then separating that plutonium from fission waste products.

36 In the extremely long-lasting radioactive decay sequence used to date ancient rocks, uranium-238 eventually becomes a stable isotope of which element?

36In the extremely long-lasting radioactive decay sequence often used by scientists to find the age of ancient rocks, uranium-238 eventually becomes a stable isotope of which element?

After chemically removing the high-level wastes, the recoverable isotopes in spent fuels and their half lives are: Uranium-235 710 million years Uranium-238 4.