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Definitions (158)
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terrestrial radiation
The portion of the natural background radiation that is emitted by naturally occurring radioactive materials, such as uranium, thorium, and radon in the earth.
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rem
A unit in the traditional system of units that measures the effects of ionizing radiation on humans.
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becquerel
The unit of radioactive decay equal to one disintegration per second. The Becquerel is the basic unit of radioactivity used in the international system of radiation units, referred to as the “SI” unit [..]
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x rays
Penetrating electromagnetic radiation having a range of wavelengths (energies) that are similar to those of gamma photons. X rays are usually produced by excitation of the electron field around certai [..]
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whole-body counter
A device used to identify and measure the radioactive material in the body of human beings and animals. It typically uses heavy shielding to keep out background radiation from the ultra-sensitive radi [..]
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whole-body exposure
An exposure of the body to radiation, in which the entire body, rather than an isolated part, is irradiated. Where a radioisotope is uniformly distributed throughout the body tissues, rather than bein [..]
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well-logging
A technique used in oil and gas exploration to help predict the commercial viability of new or existing wells. It involves lowering a well-logging tool, including a sealed source of radioactive materi [..]
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waste
Solid, liquid, and gaseous materials from nuclear operations that are radioactive or become radioactive and for which there is no further use. Wastes are generally classified as high-level (having rad [..]
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uranium hexafluoride production facility
A facility that receives natural uranium in the form of ore concentrate; enriches it, either by gaseous diffusion or gas centrifuge methods; and converts it into uranium hexafluoride (UF6).
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ultraviolet
Electromagnetic radiation with a wavelength ranging from violet within the visible spectrum to low-energy x rays.
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