A negatively charged ion.
The shutdown of a generating unit, transmission line, or other facility for emergency reasons, or a condition in which the equipment is unavailable as a result of an unanticipated breakdown. An outage (whether full, partial, or attributable to a failed start) is considered "f...
Another name for auxiliary feedwater.
As new fuel shipping canisters arrive in the reactor building, the reactor building crane lifts them to the refueling floor, where the fuel is removed from the canister and inspected for defects. The fuel can then be stored either the new fuel storage area (which is dry...
A common nuclear power reactor design in which very pure water is heated to a very high temperature by fission, kept under high pressure (to prevent it from boiling), and converted to steam by a steam generator (rather than by boiling, as in a boiling-water reactor). The resu...
3109. 9/MFW/83/09/28/0MEMORANDUM FOR: MichiSEP 20 83- 1 -Distribution:WM File: ZTO9.9WMHL r/fNMSS r/fREBrowningMJBellDJFehringerMFWeber & r/fPMOrnsteinHJMillerJOBuntingPSJustusJTGreevesPDRMRKnappiel F. Weber. WMHLMatthew J. Gordon, WMHLJulia Corrado, WMHTJeffrey Pohle, WMHTTim...
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A unit of power equivalent to one million watts.
Those fission products that exist in the gaseous state. In nuclear power reactors, this includes primarily the noble gases, such as krypton and xenon.
The region in a radiation/contamination area where the level of radiation/contamination is significantly greater than in neighboring regions in the area.
The external exposure dose equivalent to the lens of the eye at a tissue depth of 0.3 centimeters (300 mg/cm2).
The rise in temperature of the reactor fuel rods resulting from an increase in the rate of fission in the core.
A U.S. State that has signed an agreement with the U.S. Nuclear Regulatory Commission (NRC) authorizing the State to regulate certain uses of radioactive materials within the State.
A reactor that produces more nuclear fuel than it consumes. A fertile material, such as uranium-238, when bombarded by neutrons, is transformed into a fissile material, such as plutonium-239, which can be used as fuel.
The central portion of a nuclear reactor, which contains the fuel assemblies, moderator, neutron poisons, control rods, and support structures. The reactor core is where fission takes place.
A chemical combination of two or more elements combined in a fixed and definite proportion by weight.
The nucleus of deuterium. It contains one proton and one neutron. See also Heavy water (D2O).
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 health and safety.
The external whole-body exposuredose equivalent at a tissue depth of 1 cm (1000 mg/cm2). For further information, see Measuring Radiation.
The maximum load that a generating unit, generating station, or other electrical apparatus can carry under specified conditions for a given period of time without exceeding approved limits of temperature and stress.
Backup water supply used during nuclear plant startup and shutdown to supply water to the steam generators during accident conditions for removing decay heat from the reactor.
The percentage of the total energy content of a power plant's fuel that is converted into electricity. The remaining energy is lost to the environment as heat.