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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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Generator capacity

Generator capacity … The maximum amount of electric energy that a generator can produce (from the mechanical energy of the turbine ), adjusted for ambient conditions. Generator capacity is commonly expressed in megawatts (MW) . … Generator …

Daughter products

Daughter products … Isotopes that are formed by the radioactive decay of some other isotope. In the case of radium-226 , for example, there are 10 successive daughter products, ending in the stable isotope lead-206. … Daughter …

Control rod

Control rod … A rod, plate, or tube containing a material such as hafnium, boron, etc., used to control the power of a nuclear reactor . By absorbing neutrons , a control rod prevents the neutrons from causing further fissions . … Control …

Yellowcake

Yellowcake … The solid form of mixed uranium oxide, which is produced from uranium ore in the uranium recovery (milling) process. The material is a mixture of uranium oxides, which can vary in proportion and color from yellow to orange to dark green …

Cooling tower

Cooling tower … A heat exchanger designed to aid in the cooling of water that was used to cool exhaust steam exiting the turbines of a power plant . Cooling towers transfer exhaust heat into the air instead of into a body of water. … Cooling …

Nuclear materials

Nuclear materials … See Special nuclear material , Source material , and Byproduct material . For additional detail, see Nuclear Materials . … Nuclear …

Electromagnetic radiation

Electromagnetic radiation … A traveling wave motion resulting from changing electric or magnetic fields. Familiar electromagnetic radiation range from x-rays (and gamma rays ) of short wavelength, through the ultraviolet , visible, and infrared regions, …

Chemical recombination

Chemical recombination … Following an ionization event, the positively and negatively charged ion pairs may or may not realign themselves to form the same chemical substance they formed before ionization. Thus, chemical recombination could change the …

Auxiliary building

Auxiliary building … A building at a nuclear power plant , which is frequently located adjacent to the reactor containment structure , and houses most of the auxiliary and safety systems associated with the reactor , such as radioactive waste systems, …

Cumulative dose

Cumulative dose … The total dose that an occupationally exposed worker receives as a result of repeated exposures to ionizing radiation to to the same portion of the body, or to the whole body, over time. For additional detail, see Information for …