Page 1 of 1PUBLIC SUBMISSIONAs of: March 26, 2014Received: March 23, 2014Status: Pending-PostTracking No. ljy-8b4j-90nzComments Due: April 04, 2014Submission Type: WebDocket: NRC-2013-0230Fiscal Year 2014-2018 Strategic PlanComment On: NRC-2013-0230-0001Draft Fiscal Years 2014...
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A sudden, very rapid rise in the power level of a reactor caused by supercriticality. Excursions are usually quickly suppressed by the moderator temperature coefficient, the fuel temperature coefficient, or the void coefficient of reactivity (depending upon reactor design), o...
Any material that emits neutrons, such as a mixture of radium and beryllium, that can be inserted into a reactor to ensure a neutron flux large enough to be distinguished from background to register on neutron detection equipment.
A phase of reactor decommissioning in which structures, systems, and components that contain radioactive contamination are removed from a site and safely disposed of at a commercially operated low-level waste disposal facility or decontaminated to a level that permits the site...
An excavated, underground facility that is designed, constructed, and operated for safe and secure permanent disposal of HLW. A geological repository uses an engineered barrier system and a portion of the site’s natural geology, hydrology, and geochemical systems to isol...
Uranium with a percentage of uranium-235 lower than the 0.7 percent (by mass) contained in natural uranium. Depleted uranium is the byproduct of the uranium enrichment process. Depleted uranium can be blended with highly enriched uranium, such as that from weapons, to make rea...
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 chemical composition of the material bombarded by ...
Glossary RWEV-REP-001 4-3 canister An unshielded metal container used as: A pour mold in which molten vitrified high-level radioactive waste could solidify and cool. A container in which DOE and electric utilities would place intact spent nuclear fuel, loose rods, or no...
A long, slender, zirconium metal tube containing pellets of fissionable material, which provide fuel for nuclear reactors. Fuel rods are assembled into bundles called fuel assemblies, which are loaded individually into the reactor core.
A nuclear reactor in which the coolant is a gas.
The theory and application of the principles and techniques involved in measuring and recording doses of ionizing radiation.
Undesirable radiological or chemical material (with a potentially harmful effect) that is either airborne or deposited in (or on the surface of) structures, objects, soil, water, or living organisms.
A unit of energy equivalent to 1,000 kilowatts of electricity used continuously for 1 hour.
Nuclear plant activities that are essential for the safe operation of the facility. These cornerstones are grouped under the categories of reactor safety, radiation safety, and safeguards.
The area in a nuclear power plant from which most of the plant's power production and emergency safety equipment can be operated by remote control.
An airtight door system that preserves the pressure integrity of the containment structure of a nuclear reactor, while allowing access to personnel and equipment.
--41||GPU Nuclear,Inc. 1 ,(Route 441 South -|Post Office Box 480NUCLEARMiddletown, PA 17057-0480Tel 717-944 7621April 30, 19991920-99-20214)iI,'U.S. Nuclear Regulatory CommissionAttn: Document Control DeskWashington, DC 20555Subject: Three Mile Island Nuclear Station, Unit 1 (...
A system used for continuously filtering and demineralizing a reactor coolant system to reduce contamination levels and to minimize corrosion.
A general designation applied to radiation detection instruments or survey meters that detect and measure radiation. The signal that announces an ionization event is called a count. For related information, see Detecting Radiation.
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.
The space inside a reactor fuel rod that exists between the fuel pellet and the fuel rod cladding.
One of the 103 known chemical substances that cannot be broken down further without changing its chemical properties. Some examples include hydrogen, nitrogen, gold, lead, and uranium. See the periodic table of elements.
One millionth of a curie. That amount of radioactive material that disintegrates (decays) at the rate of 37 thousand atoms per second.
An instrument that detects and measures ionizing radiation by measuring the electrical current that flows when radiation ionizes gas in a chamber, making the gas a conductor of electricity.