Nuclear energy

Nuclear energy

Nuclear binding energy is the energy required to split a nucleus of an atom into its component parts. The component parts are neutrons and protons, which are collectively called nucleons. The binding energy of nuclei is always a positive number, since all nuclei require net energy to separate them into individual protons and neutrons.

Industry: Energy

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Nuclear energy

Design-basis phenomena

Energy; Nuclear energy

Earthquakes, tornadoes, hurricanes, floods, etc. , that a nuclear facility must be designed and built to withstand without loss of systems, structures, and components necessary to ensure public ...

Design-basis accident

Energy; Nuclear energy

A postulated accident that a nuclear facility must be designed and built to withstand without loss to the systems, structures, and components necessary to ensure public health and safety.

Design certification

Energy; Nuclear energy

Certification and approval by the NRC of a standard nuclear power plant design independent of a specific site or an application to construct or operate a plant. A design certification is valid for 15 ...

Derived air concentration-hour (DAC-hour)

Energy; Nuclear energy

The product of the concentration of radioactive material in air (expressed as a fraction or multiple of the derived air concentration for each radionuclide) and the time of exposure to that ...

Derived air concentration (DAC)

Energy; Nuclear energy

The concentration of a given radionuclide in air which, if breathed by the reference man for a working year of 2,000 hours under conditions of light work (with an inhalation rate of 1. 2 cubic metres ...

Depleted uranium

Energy; Nuclear energy

Uranium with a percentage of uranium-235 lower than the 0. 7 percent (by mass) contained in natural uranium. (The normal residual U-235 content in depleted uranium is 0. 2?. 3 percent, with U-238 ...

Departure from nucleate boiling (DNB)

Energy; Nuclear energy

The point at which the heat transfer from a fuel rod rapidly decreases due to the insulating effect of a steam blanket that forms on the rod surface when the temperature continues to increase.