The combination of phosphor, photomultiplier tube, and associated electronic circuits for counting light emissions produced in the phosphor by ionizing radiation.
Standard Review Plan for License Applications for Fuel Cycle Facilities Applications for Fuel Cycle FacilitiesNUREG-1520, Revision 2Soly I Soto Project Manager Soly I. Soto, Project ManagerDivision of Fuel Cycle Safety and SafeguardsJune 10, 20141Agenda Agenda• Purpose of Stan...
New Rulemaking Tracking and ReportingCategory 3 Public MeetingMay 18, 2017Meeting PurposeTo demonstrate the NRC’s new rulemaking webpages and tracking data, answer questions, and receive feedback.2Meeting AgendaWelcome and Introductions 30 minutesDemonstration of New Rulemakin...
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 OFFICE OF THE INSPECTOR GENERAL May 12, 2014 MEMORANDUM TO: Mark A. Satorius Executive Director for Operations FROM: Stephen D. Dingbaum /RA/ Assistant Inspector General for ...
1NRR-DRMAPEm ResourceFrom: Drouin, MarySent: Friday, August 16, 2019 3:01 PMTo: Miller, EdCc: Weerakkody, Sunil; Gilbertson, Anders; Gonzalez, FelixSubject: Aug 21 public mtg 8-16-09.pptxAttachments: Aug 21 public mtg 8-16-09.pptxEd, Attached are my slides for the Aug 21 publ...
The time required for a biological system, such as that of a human, to eliminate, by natural processes, half of the amount of a substance (such as a radioactive material) that has entered it.
The sum of the effective dose equivalent (for external exposures) and the committed effective dose equivalent (for internal exposures).
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.
The steam generator tubes, steam turbine, condenser, and associated pipes, pumps, and heaters used to convert the heat energy of the reactor coolant system into mechanical energy for electrical generation. Most commonly used in reference to pressurized water reactors.
A colloquial term describing a container (usually lead or depleted uranium) used to ship or store radioactive materials. The thick walls of this shielding device protect the person handling the container from radiation. Large containers used for spent fuel storage are commonl...
Radioactive materials at the end of their useful life or in a product that is no longer useful and requires proper disposal. See High-level radioactive waste, Low-level radioactive waste, and Spent (depleted or used) nuclear fuel.
A steam (or water) turbine directly coupled to an electrical generator. The two devices are often referred to as one unit.
Defines an interval within which a numerical result is expected to lie within a specified level of confidence. The interval often used is the 5-95 percentile of the distribution reporting the uncertainty.
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.
Office of Civilian Radioactive Waste ManagementOA: OAQUALITYASSURANCE REQUIREMENTS ANDDESCRIPTIONDOE/IR W-0333PRevision 16Effective Date: 08/23/2004SIGNATURE ON FILER. Dennis Brown, DirectorOffice of Quality Assurance,9 /2.3DaleSIGNATURE ON FILEW. John Arthur, III., Deputy Dir...
A radioactive isotope of hydrogen. Because it is chemically identical to natural hydrogen, tritium can easily be taken into the body by any ingestion path. It decays by emitting beta particles and has a half-life of about 12.5 years. For related information, see the Fact Shee...
A common method for concentrating uranium from a solution. The uranium solution is passed through a resin bed where the uranium-carbonate complex ions are transferred to the resin by exchange with a negative ion like chloride. After build-up of the uranium complex on the resi...
The use of sealed sources of ionizing radiation for nondestructive examination of the structure of materials. When the radiation penetrates the material, it produces a shadow image by blackening a sheet of photographic film that has been placed behind the material, and the di...
Rational, sensible, or resulting from sound judgment.
The ratio of the heat flux needed to cause departure from nucleate boiling to the actual local heat flux of a fuel rod.
Penetrating electromagnetic radiation (photon) having a wavelength that is much shorter than that of visible light. These rays are usually produced by excitation of the electron field around certain nuclei. In nuclear reactions, it is customary to refer to photons originating...
All operations involving the lowering and raising of measuring devices or tools that contain licensed nuclear material or are used to detect licensed nuclear materials in wells for the purpose of obtaining information about the well or adjacent formations that may be used in ...
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 effect) (see 10 CFR 20.1003).
An approach to regulation taken by the NRC, which incorporates an assessment of safety significance or relative risk. This approach ensures that the regulatory burden imposed by an individual regulation or process is appropriate to its importance in protecting the health and ...
The process by which the NRC monitors and evaluates the performance of commercial nuclear power plants. Designed to focus on those plant activities that are most important to safety, the process uses inspection findings and performance indicators to assess each plant’s safety...