Accessibility Information and Accesskeys | Skip navigation

Radiation Protection Glossary

Search the Glossary by either clicking on a letter or typing a Keyword into the search box.

A | B | C | D | E | F | G | H | I | J | K | L | M
N | O | P | Q | R | S | T | U | V | W | XYZ
Uranium
Uranium is a heavy, metallic, naturally Radioactive Element of Atomic Number 92. It has two principle isotope of uranium-235 and uranium-238 ( and very small quantities of Uranium-234). The proportions of natural uranium by weight are about 0.01% Uranium-234, 0.072% Uranium-235, and 99.27% U-238. Uranium-235 is used in the the nuclear industry because it is Fissionable by Thermal Neutrons. Natural uranium is extracted from uranium ore where it starts life as a processed uranium oxide (Yellow Cake ).