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Due to a lapse in appropriations, the NRC has ceased normal operations. However, excepted and exempted activities necessary to maintain critical health and safety functions—as well as essential progress on designated critical activities, including those specified in Executive Order 14300—will continue, consistent with the OMB-Approved NRC Lapse Plan.

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Weighting factor (WT)

Weighting factor (WT) … Multipliers of the equivalent dose to an organ or tissue used for radiation protection purposes to account for different sensitivities of different organs and tissues to the induction of stochastic effects of radiation (see 10 CFR …

Unnecessary regulatory burden

Unnecessary regulatory burden … Regulatory criteria that go beyond the levels that would be reasonably expected to be imposed on licensees given that regulations apply to conditions that incorporate normal operation and design-basis conditions. … …

Void coefficient of reactivity

Void coefficient of reactivity … A rate of change in the reactivity of a water reactor system resulting from a formation of steam bubbles as the power level and temperature increase. … Void coefficient of …

Standard Technical Specifications

Standard Technical Specifications … NRC staff guidance on model technical specifications for an operating license. (See also Technical Specifications.) … Standard Technical …

Non-stochastic effect

Non-stochastic effect … The health effects of radiation, the severity of which vary with the dose and for which a threshold is believed to exist. Radiation-induced cataract formation is an example of a non-stochastic effect (also called a deterministic …

Nuclear power plant

Nuclear power plant … A thermal power plant, in which the energy (heat) released by the fissioning of nuclear fuel is used to boil water to produce steam. The steam spins the propeller-like blades of a turbine that turns the shaft of a generator to …

NRC Operations Center

NRC Operations Center … The primary center of communication and coordination among the NRC, its licensees, State and Tribal agencies, and other Federal agencies, regarding operating events involving nuclear reactors or materials . Located in Rockville, …

Iodine spiking factor

Iodine spiking factor … The magnitude of a rapid, short-term increase in the appearance rate of radioiodine in the reactor coolant system. This increase is generally caused by a reactor transient that results in a rapid drop in reactor coolant system …

Integrated plant evaluation

Integrated plant evaluation … An evaluation that considers the plant as a whole rather than system by system. … Integrated plant evaluation …

Incident response (IR)

Incident response (IR) … Activities that address the short-term, direct effects of a natural or human-caused event and require an emergency response to protect life or property. For detail, see Emergency Preparedness and Response and the NRC Incident …