December 30, 1998e'[ -MEMORANDUM TO: Matt SchmitPMDA >FROM: Eric Compton, Engineering Aide (orig, signed by)Materials Safety Branch, INMSSUBJECT: COMMENTS OF NRC DATA ARCHITECTURE NAMINGSTANDARDS AND CONVENTIONS DOCUMENTIMNS has reviewed the document, in response to Francine G...
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.
One thousandth of a roentgen (R). 1mR = 10-3 R = 0.001 R.
The process of separating isotopes from one another, or changing their relative abundances, as by gaseous diffusion or electromagnetic separation. Isotope separation is a step in the isotopic enrichment process.
A method for extracting uranium from ore. The ore is placed in piles or heaps on top of liners. The liners
prevent uranium and other chemicals from moving into the ground. Sulfuric acid is dripped onto the heap and dissolves uranium as it moves through the ore. Uraniu...
A measure of the intensity of neutron radiation, determined by the rate of flow of neutrons. The neutron flux value is calculated as the neutron density (n) multiplied by neutron velocity (v), where n is the number of neutrons per cubic centimeter (expressed as neutrons/cm3) ...
An association established in 1997 to give national nuclear regulators with mature civilian nuclear reactor and materials programs a forum to discuss nuclear safety and security issues of mutual interest. Canada, France, Germany, Japan, the Republic of Korea, Spain, Sweden, th...
A type of security exercise designed to evaluate and improve the effectiveness of a security system. For the NRC, force-on-force exercises are used to assess the ability of the licensee to defend a nuclear power plant and other nuclear facilities against a design-basis threat....
A potential accident in which a breach in a reactor’s pressure boundary causes the coolant water to rush out of the reactor faster than makeup water can be added back in. Without sufficient coolant, the reactor core could heat up and potentially melt the zirconium fuel c...
A complex designed and constructed for the interim storage of spent nuclear fuel; solid, reactor-related, greater than Class C waste; and other associated radioactive materials. A spent fuel storage facility may be considered independent, even if it is located on the site of ...
One of three units used to measure radioactivity, which refers to the amount of ionizing radiation released when an element (such as uranium) spontaneously emits energy as a result of the radioactive decay (or disintegration) of an unstable atom. Radioactivity is also the ter...
A secure, Web-based data system that helps the NRC and its Agreement States track and regulate the medical, industrial, and academic uses of certain nuclear materials, from the time they are manufactured or imported to the time of their disposal or exportation. This informatio...
The collection of samples of air to measure the radioactivity or to detect the presence of radioactive material, particulate matter, or chemical pollutants in the air. For related information, see Detecting Radiation and Regulatory Guide 8.25, "Air Sampling in the Workplace."
A heavily shielded container used for the dry storage or shipment (or both) of radioactive materials such as spent nuclear fuel or other high-level radioactive waste (HLW). Casks are often made from lead, concrete, or steel. Casks must meet regulatory requirements. For additio...
The time in which one half of the atoms of a particular radioactive substance disintegrate into another nuclear form. Measured half-lives vary from millionths of a second to billions of years. Also called physical or radiological half-life.
A facility where uranium hexafluoride gas is filtered. Uranium-235 is separated from uranium-238, increasing the percentage of uranium-235 from 1 to about 3 percent. The process requires enormous amounts of electric power. For additional detail, see Gaseous diffusion.
The sum of the products of the dose equivalent to the organ or tissue (HT) and the weighting factors (WT) applicable to each of the body organs or tissues that are irradiated (HE = ΣWTHT).
The reaction that occurs when a nucleus captures a neutron. The probability that a given material will capture a neutron is proportional to its neutron capture cross section and depends on the energy of the neutrons and the nature of the material.
US Army Corps of Engineers ST. LOUIS ENGINEER DISTRICT RADIOLOGICAL HISTORICAL ASSESSMENT PELHAM RANGE Fort McClellan Anniston, Alabama FINAL REPORT December 2001 Prepared by US ARMY CORPS OF ENGINEERS ST. LOUIS DISTRICT Section 1.0 2.0 3.0 4.0 u 5.0 HISTORICAL ASSESSMENT - PE...
-..PENNSTAFEC L,FL"4o.ncy . : i n, inca, car m.m., acoa.., nmum, ,n., isnn,, i, ,,,,., s a m, < , o,,F +1uiam 4. wa r anst i nymer,ing ('cnic, l'na crut, l's k , l' A lisolAugust 23,1991Nuclear Regulatory CommissionDocument Control RoomWashington, DC 20555REF: Revision to the ...
RAS'I7F63May 21, 2004UNITED STATES OF AMENUCLEAR REGULATORY CON1BEFORE THE ATOMIC SAFETY AND LIRICA DOCKETEDRICA USNRCIMISSIONMay 25,2004 (4:06PM)ICENSING BOARDOFFICE OF SECRETARYRULEMAKINGS ANDADJUDICATIONS STAFFDocket Nos. 50-413-OLA50-414-OLAIn the Matter of:DUKE ENERGY COR...
An isotope of hydrogen with one proton and one neutron in the nucleus.
--------= -------=--- -----=--~---------I L ___ _ • • ATTACHMENT 1 SURRY POWER STATION UNIT 1 19 9 0 ANNUAL STEAM GENERA TOR INSERVICE INSPECTION REPORT VIRGINIA ELECTRIC AND POWER COMPANY ( 9103040073 910225 ; PDR ADOCK 05000280 Q PDR • • ATTACHMENT 1 SURRY POWER STATION UNIT...