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S1G Reactor
The S1G reactor is a naval reactor used by the United States Navy to provide electricity generation and propulsion on warships. The S1G designation stands for: * S = Submarine platform * 1 = First generation core designed by the contractor * G = General Electric was the contracted designer History This nuclear reactor was constructed by General Electric as a prototype for the USS ''Seawolf'' (SSN-575) submarine. It was a liquid metal cooled reactor using pure sodium to cool the core instead of water, because the higher temperature of liquid sodium (compared to pressurized water) enabled the production of more superheated steam in the steam generators. This resulted in a more efficient thermal cycle, yielding more shaft horsepower for a given reactor size. The reactor design had problems because of limited operating temperature constraints. The major disadvantage of this concept was the ignition of sodium when exposed to air. S1G was used for testing and training. Eve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Naval Reactor
United States naval reactors are nuclear reactors used by the United States Navy aboard certain ships to generate the steam used to produce Power (physics), power for Marine nuclear propulsion, propulsion, electric power, catapulting airplanes in aircraft carriers, and a few more minor uses. Such naval nuclear reactors have a complete power plant associated with them. All U.S. Navy submarines and supercarriers built since 1975 are Nuclear power, nuclear-powered by such reactors. There are no commissioned conventional (non-nuclear) submarines or aircraft carriers left in the U.S. Navy, since the last conventional carrier, , was decommissioned in May 2009. The U.S. Navy had nine nuclear-powered cruisers with such reactors also, but they have since been decommissioned. Reactors are designed by a variety of contractors, then developed and tested at one of several government (United States Department of Energy, Department of Energy) owned and prime contractor-operated facilities: Be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steam
Steam is a substance containing water in the gas phase, and sometimes also an aerosol of liquid water droplets, or air. This may occur due to evaporation or due to boiling, where heat is applied until water reaches the enthalpy of vaporization. Steam that is saturated or superheated is invisible; however, "steam" often refers to wet steam, the visible mist or aerosol of water droplets formed as water vapor condenses. Water increases in volume by 1,700 times at standard temperature and pressure; this change in volume can be converted into mechanical work by steam engines such as reciprocating piston type engines and steam turbines, which are a sub-group of steam engines. Piston type steam engines played a central role in the Industrial Revolution and modern steam turbines are used to generate more than 80% of the world's electricity. If liquid water comes in contact with a very hot surface or depressurizes quickly below its vapor pressure, it can create a steam explosion. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
D1G Reactor
The D1G reactor was a prototype naval reactor designed for the United States Navy to provide electricity generation and propulsion on warships. The D1G designation stands for: * D = Destroyer platform * 1 = First generation core designed by the contractor * G = General Electric was the contracted designer This prototype nuclear reactor was constructed for the United States Department of Energy's Office of Naval Reactors as part of the Naval Nuclear Propulsion Program. The reactor was built by General Electric and operated by the Knolls Atomic Power Laboratory at the Kesselring Site Operation in West Milton, New York. It was used for testing components and as a training tool for the Nuclear Power Training Unit. The reactor operated from 1962 to 1996, when it was shut down in March of that year. It was later defuelled, with the pressure vessel eventually removed in 2002. The containment structure — which housed both the primary (nuclear reactor) and secondary (steam plant) s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Horton Sphere
Horton may refer to: Places Antarctica * Horton Glacier, Adelaide Island, Antarctica * Horton Ledge, Queen Elizabeth Land, Antarctica Australia * Horton, Queensland, a town and locality in the Bundaberg Region * Horton River (Australia), in northern New South Wales Canada * Horton, Ontario, a township * Horton River (Canada), a tributary of the Beaufort Sea * Horton Township, Nova Scotia, an 18th-century township; see Wolfville United Kingdom * Horton Beach, Port Eynon Bay, Wales * Horton, Berkshire, a village and civil parish * Horton, Buckinghamshire, a hamlet of Ivinghoe * Horton or Horton by Malpas, Cheshire, a village and former civil parish * Horton, Dorset, a village and civil parish ** Horton Priory, its ruined religious house upon which the parish church was built * Horton, Gloucestershire, a village * Horton, Lancashire, a village and civil parish * Horton, Northamptonshire, a village * Horton, Blyth, Northumberland, a village * Horton, Chatton, a pair o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
USS Nautilus (SSN-571)
USS ''Nautilus'' (SSN-571) was the world's first operational nuclear-powered submarine and the first submarine to complete a submerged transit of the North Pole on 3 August 1958. Her initial commanding officer was Eugene "Dennis" Wilkinson, a widely respected naval officer who set the stage for many of the protocols of today's Nuclear Navy of the US, and who had a storied career during military service and afterwards. Sharing a name with Captain Nemo's fictional submarine in Jules Verne's classic 1870 science fiction novel ''Twenty Thousand Leagues Under the Sea'' and the that served with distinction in World War II, the new nuclear-powered ''Nautilus'' was authorized in 1951. Construction began in 1952, and the boat was launched in January 1954, sponsored by Mamie Eisenhower, First Lady of the United States, wife of 34th President Dwight D. Eisenhower; it was commissioned the following September into the United States Navy. ''Nautilus'' was delivered to the Navy in 1955. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pressurized Water Reactor
A pressurized water reactor (PWR) is a type of light-water reactor, light-water nuclear reactor. PWRs constitute the large majority of the world's nuclear power plants (with notable exceptions being the UK, Japan and Canada). In a PWR, the primary nuclear reactor coolant, coolant (water) is pumped under high pressure to the reactor core where it is heated by the energy released by the Nuclear fission, fission of atoms. The heated, high pressure water then flows to a Water-tube boiler, steam generator, where it transfers its thermal energy to lower pressure water of a secondary system where steam is generated. The steam then drives turbines, which spin an electric generator. In contrast to a boiling water reactor (BWR), pressure in the primary coolant loop prevents the water from boiling within the reactor. All light-water reactors use ordinary water as both coolant and neutron moderator. Most use anywhere from two to four vertically mounted steam generators; VVER reactors use horizo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
S2W Reactor
The S2W reactor was a naval reactor used by the United States Navy to provide electricity generation and propulsion on warships. The S2W designation stands for: * S = Submarine platform * 2 = Second generation core designed by the contractor * W = Westinghouse was the contracted designer History This nuclear reactor is the shipboard equivalent of the prototype S1W reactor, with minor design changes, that was installed on . As installed in ''Nautilus'' it generated . It was originally designated STR. USS ''Nautilus'' ''Nautilus'' was powered by the Submarine Thermal Reactor (STR), later redesignated the S2W reactor, a pressurized water reactor produced for the US Navy by Westinghouse Electric Corporation. Bettis Atomic Power Laboratory, operated by Westinghouse, developed the basic reactor plant design used in ''Nautilus'' after being given the assignment on 31 December 1947 to design a nuclear power plant for a submarine. After ''Nautilus'' was decommissioned, the rea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
S1W Reactor
The S1W reactor was the first prototype naval reactor used by the United States Navy to prove that the technology could be used for electricity generation and propulsion on submarines. The designation of "S1W" stands for * S = Submarine platform * 1 = First generation core designed by the contractor * W = Westinghouse was the contracted designer and is a later Navy designation. During the plant's early years the project name was "Submarine Thermal Reactor" (STR) The land-based nuclear reactor was built at the National Reactor Testing Station, later called Idaho National Engineering Laboratory near Arco, Idaho. The plant was the prototype for the power system of USS ''Nautilus'' (SSN-571), the world's first nuclear-powered submarine, which used the improved S2W reactor. The specific location within the vast Idaho National Laboratory where the S1W prototype was located was the Naval Reactors Facility. Design Under the leadership of Captain (later Admiral) Hyman G. Rickover, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Operating Temperature
An operating temperature is the allowable temperature range of the local ambient environment at which an electrical or mechanical device operates. The device will operate effectively within a specified temperature range which varies based on the device function and application context, and ranges from the minimum operating temperature to the maximum operating temperature (or peak operating temperature). Outside this range of safe operating temperatures the device may fail. It is one component of reliability engineering. Similarly, biological systems have a viable temperature range, which might be referred to as an "operating temperature". Ranges Most devices are manufactured in several temperature grades. Broadly accepted grades are: *Commercial: 0 ° to 70 °C *Industrial: −40 ° to 85 °C *Military: −55 ° to 125 °C Nevertheless, each manufacturer defines its own temperature grades so designers must pay close attention to actual datasheet spe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Horsepower
Horsepower (hp) is a unit of measurement of power, or the rate at which work is done, usually in reference to the output of engines or motors. There are many different standards and types of horsepower. Two common definitions used today are the mechanical horsepower (or imperial horsepower), which is about 745.7 watts, and the metric horsepower, which is approximately 735.5 watts. The term was adopted in the late 18th century by Scottish engineer James Watt to compare the output of steam engines with the power of draft horses. It was later expanded to include the output power of other types of piston engines, as well as turbines, electric motors and other machinery. The definition of the unit varied among geographical regions. Most countries now use the SI unit watt for measurement of power. With the implementation of the EU Directive 80/181/EEC on 1 January 2010, the use of horsepower in the EU is permitted only as a supplementary unit. History The development of the stea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steam Generator (nuclear Power)
Steam generators are heat exchangers used to convert water into steam from heat produced in a nuclear reactor core. They are used in pressurized water reactors (PWR) between the primary and secondary coolant loops. In typical PWR designs, the primary coolant is high-purity water, kept under high pressure so it cannot boil. This primary coolant is pumped through the reactor core where it absorbs heat from the fuel rods. It then passes through the steam generator, where it transfers its heat (via conduction through metal) to lower-pressure water which is allowed to boil. Purpose Unlike PWRs, boiling water reactors (BWRs) do not use steam generators. The primary coolant is allowed to boil directly in the reactor core, and the steam is simply passed through a steam turbine. While theoretically simple, this has a downside for maintenance. While passing through the core, primary coolant water is subjected to high neutron flux. This activates oxygen and dissolved nitrogen in the water. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sodium
Sodium is a chemical element with the symbol Na (from Latin ''natrium'') and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium is an alkali metal, being in group 1 of the periodic table. Its only stable isotope is 23Na. The free metal does not occur in nature, and must be prepared from compounds. Sodium is the sixth most abundant element in the Earth's crust and exists in numerous minerals such as feldspars, sodalite, and halite (NaCl). Many salts of sodium are highly water-soluble: sodium ions have been leached by the action of water from the Earth's minerals over eons, and thus sodium and chlorine are the most common dissolved elements by weight in the oceans. Sodium was first isolated by Humphry Davy in 1807 by the electrolysis of sodium hydroxide. Among many other useful sodium compounds, sodium hydroxide (lye) is used in soap manufacture, and sodium chloride (edible salt) is a de-icing agent and a nutrient for animals including h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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