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Browns Ferry Nuclear Plant
The Browns Ferry Nuclear Plant is located on the Tennessee River near Decatur, Alabama, Decatur and Athens, Alabama, on the north side (right bank) of Wheeler Lake. The site has three General Electric boiling water reactor (BWR) nuclear generating units and is owned entirely by the Tennessee Valley Authority (TVA). With a generating capacity of nearly 3.8 watt, gigawatts, it is the List of the largest nuclear power stations in the United States, second most powerful nuclear plant in the United States, behind the Palo Verde Nuclear Generating Station in Arizona, and the most powerful generating station operated by TVA. History The nuclear power plant is named after a ferry that operated at the site until the middle of the 20th century. Browns Ferry was TVA's first nuclear power plant; its approval occurred on June 17, 1966 and construction began in September 1966. In 1974, the time of its initial operation, it was the largest nuclear plant in the world. It was the first nuclear pla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Athens, Alabama
Athens is a city in and the county seat of Limestone County, in the U.S. state of Alabama; it is included in the Huntsville-Decatur-Albertville, AL Combined Statistical Area. As of the 2010 census, the population of the city is 21,897. History Founded in 1818 by John Coffee, Robert Beaty, John D. Carroll, and John Read, Athens is one of the oldest incorporated cities in the state, having been incorporated one year prior to the state's admittance to the Union in 1819. Limestone County was also created by an act of the Alabama Territorial Legislature in 1818.A Digest of the Laws of the State of Alabama: Containing The Statutes and Resolutions in Force at the end of the General Assembly in January, 1823. Published by Ginn & Curtis, J. & J. Harper, Printers, New-York, 1828. Title 62. Chapter XXV. Page 803"An Act to Incorporate the Town of Athens, in Limestone County.—Passed November 19, 1818." (Google Books)/ref> The town was first called Athenson, but was incorporated as At ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuclear Regulatory Commission
The Nuclear Regulatory Commission (NRC) is an independent agency of the United States government tasked with protecting public health and safety related to nuclear energy. Established by the Energy Reorganization Act of 1974, the NRC began operations on January 19, 1975, as one of two successor agencies to the United States Atomic Energy Commission. Its functions include overseeing reactor safety and security, administering reactor licensing and renewal, licensing radioactive materials, radionuclide safety, and managing the storage, security, recycling, and disposal of spent fuel. History Prior to 1975 the Atomic Energy Commission was in charge of matters regarding radionuclides. The AEC was dissolved, because it was perceived as unduly favoring the industry it was charged with regulating.John Byrne and Steven M. Hoffman (1996). ''Governing the Atom: The Politics of Risk'', Transaction Publishers, p. 163. The NRC was formed as an independent commission to oversee nuclear e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Firestop
A firestop or fire-stopping is a form of passive fire protection that is used to seal around openings and between joints in a fire-resistance-rated wall or floor assembly. Firestops are designed to maintain the fire-resistance rating of a wall or floor assembly intended to impede the spread of fire and smoke. Description Firestops prevent unprotected horizontal and vertical penetrations in a fire-resistance-rated wall or floor assembly from creating a route by which fire and smoke can spread that would otherwise have been fire resisting construction, e.g. where a pipe passes through a firewall. Fire stopping is also to seal around gaps between fire resisting constructions, e.g. the linear gap between a wall and the floor above, in order for construction to form a complete barrier to fire and smoke spread. Opening types Firestops are used in: * Electrical, mechanical, and structural penetrations * Unpenetrated openings (such as openings for future use) * Re-entries of exi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electric Power Transmission
Electric power transmission is the bulk movement of electrical energy from a generating site, such as a power plant, to an electrical substation. The interconnected lines that facilitate this movement form a ''transmission network''. This is distinct from the local wiring between high-voltage substations and customers, which is typically referred to as electric power distribution. The combined transmission and distribution network is part of electricity delivery, known as the electrical grid. Efficient long-distance transmission of electric power requires high voltages. This reduces the losses produced by strong currents. Transmission lines use either alternating current (HVAC) or direct current (HVDC). The voltage level is changed with transformers. The voltage is stepped up for transmission, then reduced for local distribution. A wide area synchronous grid, known as an "interconnection" in North America, directly connects generators delivering AC power with the same rel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Critical Mass
In nuclear engineering, a critical mass is the smallest amount of fissile material needed for a sustained nuclear chain reaction. The critical mass of a fissionable material depends upon its nuclear properties (specifically, its nuclear fission cross-section), density, shape, enrichment, purity, temperature, and surroundings. The concept is important in nuclear weapon design. Explanation of criticality When a nuclear chain reaction in a mass of fissile material is self-sustaining, the mass is said to be in a ''critical'' state in which there is no increase or decrease in power, temperature, or neutron population. A numerical measure of a critical mass is dependent on the effective neutron multiplication factor , the average number of neutrons released per fission event that go on to cause another fission event rather than being absorbed or leaving the material. When ''k'' = 1, the mass is critical, and the chain reaction is self-sustaining. A ''subcritical'' mass ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Dollar
The United States dollar ( symbol: $; code: USD; also abbreviated US$ or U.S. Dollar, to distinguish it from other dollar-denominated currencies; referred to as the dollar, U.S. dollar, American dollar, or colloquially buck) is the official currency of the United States and several other countries. The Coinage Act of 1792 introduced the U.S. dollar at par with the Spanish silver dollar, divided it into 100 cents, and authorized the minting of coins denominated in dollars and cents. U.S. banknotes are issued in the form of Federal Reserve Notes, popularly called greenbacks due to their predominantly green color. The monetary policy of the United States is conducted by the Federal Reserve System, which acts as the nation's central bank. The U.S. dollar was originally defined under a bimetallic standard of (0.7735 troy ounces) fine silver or, from 1837, fine gold, or $20.67 per troy ounce. The Gold Standard Act of 1900 linked the dollar solely to gold. From 1934, it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Tennessean
''The Tennessean'' (known until 1972 as ''The Nashville Tennessean'') is a daily newspaper in Nashville, Tennessee. Its circulation area covers 39 counties in Middle Tennessee and eight counties in southern Kentucky. It is owned by Gannett, which also owns several smaller community newspapers in Middle Tennessee, including '' The Dickson Herald'', the '' Gallatin News-Examiner'', the '' Hendersonville Star-News'', the '' Fairview Observer'', and the ''Ashland City Times''. Its circulation area overlaps those of the ''Clarksville Leaf-Chronicle'' and '' The Daily News Journal'' in Murfreesboro, two other independent Gannett papers. The company publishes several specialty publications, including '' Nashville Lifestyles'' magazine. History ''The Tennessean'', Nashville's daily newspaper, traces its roots back to the ''Nashville Whig'', a weekly paper that began publication on September 1, 1812. The paper underwent various mergers and acquisitions throughout the 19th century, em ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Browns Ferry Unit 1 Under Construction
Browns may refer to: * Shades of brown of the color brown Places ;In the United States * Browns, Alabama, an unincorporated community * Browns, Illinois, a village * Browns, Boone County, Missouri, an unincorporated community * Browns, Scott County, Missouri, an unincorporated community * Browns, Ohio, an unincorporated community * Browns Lake (other) ;Elsewhere * Browns, New Zealand, a village in New Zealand's Southland Region Sports * Cleveland Browns, a National Football League team based in Cleveland, Ohio * Cleveland Browns (baseball), a Negro league baseball team * St. Louis Browns, a former Major League Baseball team now known as the Baltimore Orioles * Enterprise Browns, defunct Minor league baseball team Other * Browns (fashion boutique), a shop in Mayfair, London * Browns of Chester, a department store in Chester, England * Browns of York, a department store in York, England * The Browns, a country music group of the 1950s and '60s * The 5 Browns, a pia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kilowatt-hour
A kilowatt-hour ( unit symbol: kW⋅h or kW h; commonly written as kWh) is a unit of energy: one kilowatt of power for one hour. In terms of SI derived units with special names, it equals 3.6 megajoules (MJ). Kilowatt-hours are a common billing unit for electrical energy delivered to consumers by electric utilities. Definition The kilowatt-hour is a composite unit of energy equal to one kilowatt (kW) sustained for (multiplied by) one hour. Expressed in the standard unit of energy in the International System of Units (SI), the joule (symbol J), it is equal to 3,600 kilojoules or 3.6 MJ."Half-high dots or spaces are used to express a derived unit formed from two or more other units by multiplication.", Barry N. Taylor. (2001 ed.''The International System of Units.'' (Special publication 330). Gaithersburg, MD: National Institute of Standards and Technology. 20. Unit representations A widely used representation of the kilowatt-hour is "kWh", derived from its com ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megawatt Thermal
The watt (symbol: W) is the unit of power or radiant flux in the International System of Units (SI), equal to 1 joule per second or 1 kg⋅m2⋅s−3. It is used to quantify the rate of energy transfer. The watt is named after James Watt (1736–1819), an 18th-century Scottish inventor, mechanical engineer, and chemist who improved the Newcomen engine with his own steam engine in 1776. Watt's invention was fundamental for the Industrial Revolution. Overview When an object's velocity is held constant at one metre per second against a constant opposing force of one newton, the rate at which work is done is one watt. : \mathrm In terms of electromagnetism, one watt is the rate at which electrical work is performed when a current of one ampere (A) flows across an electrical potential difference of one volt (V), meaning the watt is equivalent to the volt-ampere (the latter unit, however, is used for a different quantity from the real power of an electrical circuit). : \mathr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chattanooga Times Free Press
The ''Chattanooga Times Free Press'' is a daily broadsheet newspaper published in Chattanooga, Tennessee, and is distributed in the metropolitan Chattanooga region of southeastern Tennessee and northwestern Georgia. It is one of Tennessee's major newspapers and is owned by WEHCO Media, Inc., a diversified communications company with ownership in 14 daily newspapers, 11 weekly newspapers and 13 cable television companies in six states. History ''Chattanooga Times'' The ''Chattanooga Times'' was first published on December 15, 1869, by the firm Kirby & Gamble. In 1878, 20-year-old Adolph Ochs borrowed money and bought half interest in the struggling morning paper. Two years later when he assumed full ownership, it cost him $5,500. In 1892, the paper's staff moved to the Ochs Building on Georgia Avenue at East Eighth Street, which is now the Dome Building. In 1896, Ochs entrusted the management of the paper to his brother-in-law Harry C. Adler when he purchased ''The New York Tim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Net Generation
A power station, also referred to as a power plant and sometimes generating station or generating plant, is an industrial facility for the generation of electric power. Power stations are generally connected to an electrical grid. Many power stations contain one or more generators, a rotating machine that converts mechanical power into three-phase electric power. The relative motion between a magnetic field and a conductor creates an electric current. The energy source harnessed to turn the generator varies widely. Most power stations in the world burn fossil fuels such as coal, oil, and natural gas to generate electricity. Low-carbon power sources include nuclear power, and an increasing use of renewables such as solar, wind, geothermal, and hydroelectric. History In early 1871 Belgian inventor Zénobe Gramme invented a generator powerful enough to produce power on a commercial scale for industry. In 1878, a hydroelectric power station was designed and built b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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