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Hans Kronberger (physicist)
Hans Kronberger CBE, FRS (28 July 1920 – 29 September 1970) was a British physicist. During his career with the UK Atomic Energy Authority he made important contributions to the development of the British thermonuclear bomb and nuclear power engineering, especially in the field of isotope separation. Early life Hans Kronberger was born of Jewish parents in Linz, Austria, where his father was a leather merchant. Kronberger attended the Akademische Gymnasium in Linz, matriculating in Mathematics, Latin, Greek and German; he was a brilliant scholar. After the Anschluss, the annexation of Austria by Nazi Germany in 1938, Kronberger fled to Britain, arriving at Victoria Station with £10 and his school reports. He set about gaining entry to a university and was accepted at King's College, Newcastle, then a college of Durham University to read mechanical engineering. Following the fall of France, in May 1940 Kronberger was classified as a "friendly enemy alien" and interned on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Linz
Linz ( , ; cs, Linec) is the capital of Upper Austria and third-largest city in Austria. In the north of the country, it is on the Danube south of the Czech border. In 2018, the population was 204,846. In 2009, it was a European Capital of Culture. Geography Linz is in the centre of Europe, lying on the Paris–Budapest west–east axis and the Malmö–Trieste north–south axis. The Danube is the main tourism and transport connection that runs through the city. Approximately 29.27% of the city's wide area is grassland. A further 17.95% are covered with forest. All the rest areas fall on water (6.39%), traffic areas and land. Districts Since January 2014 the city has been divided into 16 statistical districts: Before 2014 Linz was divided into nine districts and 36 statistical quarters. They were: #Ebelsberg #Innenstadt: Altstadtviertel, Rathausviertel, Kaplanhofviertel, Neustadtviertel, Volksgartenviertel, Römerberg-Margarethen #Kleinmünchen: Kleinmünchen, Neue ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tatura
Tatura is a town in the Goulburn Valley region of Victoria, Australia, and is situated within the City of Greater Shepparton local government area, north of the state capital (Melbourne) and west of the regional centre of Shepparton. At the 2016 census, Tatura had a population of 4,669. During World War II, several internment camps were set up around Tatura by the Australian government. Four of these were for "enemy alien" civilians, and three were for prisoners of war. Between 1940 and 1947, there were 10,000 to 13,000 people in the internment camps at different times. With a large corporate and manufacturing presence within the town, Tatura is a major employer within the Goulburn Valley. Attractions include the Cussen Park wetlands, the Wartime Camps, and Irrigation Museum. The name of the town is an Aboriginal word meaning "small lagoon." History The Post Office opened on 1 February 1875. The Tatura Magistrates' Court closed on 1 January 1990. World War II internment ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kiritimati
Kiritimati (also known as Christmas Island) is a Pacific Ocean atoll in the northern Line Islands. It is part of the Republic of Kiribati. The name is derived from the English word "Christmas" written in Gilbertese according to its phonology, in which the combination ''ti'' is pronounced ''s'', giving kiˈrɪsmæs. Kiritimati has the greatest land area of any atoll in the world, about ; its lagoon is roughly the same size. The atoll is about in perimeter, while the lagoon shoreline extends for over . Kiritimati comprises over 70% of the total land area of Kiribati, a country encompassing 33 Pacific atolls and islands. It lies north of the equator, south of Honolulu, and from San Francisco. Kiritimati is in the world's farthest forward time zone, UTC+14, and is therefore one of the first inhabited places on Earth to experience New Year's Day. (see also Caroline Atoll, Kiribati). Although it lies east of the 180th meridian, the Republic of Kiribati realigned the Internati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Operation Grapple
Operation Grapple was a set of four series of British nuclear weapons tests of early atomic bombs and hydrogen bombs carried out in 1957 and 1958 at Malden Island and Kiritimati (Christmas Island) in the Gilbert and Ellice Islands in the Pacific Ocean (modern Kiribati) as part of the British hydrogen bomb programme. Nine nuclear explosions were initiated, culminating in the United Kingdom becoming the third recognised possessor of thermonuclear weapons, and the restoration of the nuclear Special Relationship with the United States in the form of the 1958 US–UK Mutual Defence Agreement. During the Second World War, Britain had a nuclear weapons project, codenamed Tube Alloys, which was merged with the American Manhattan Project in August 1943. Many of Britain's top scientists participated in the Manhattan Project. After the war, fearing that Britain would lose its great power status, the British government resumed the atomic bomb development effort, now codenamed High Expl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isotopes Of Lithium
Naturally occurring lithium (3Li) is composed of two stable isotopes, lithium-6 and lithium-7, with the latter being far more abundant on Earth. Both of the natural isotopes have an unexpectedly low nuclear binding energy per nucleon ( for lithium-6 and for lithium-7) when compared with the adjacent lighter and heavier elements, helium ( for helium-4) and beryllium ( for beryllium-9). The longest-lived radioisotope of lithium is lithium-8, which has a half-life of just . Lithium-9 has a half-life of , and lithium-11 has a half-life of . All of the remaining isotopes of lithium have half-lives that are shorter than 10 nanoseconds. The shortest-lived known isotope of lithium is lithium-4, which decays by proton emission with a half-life of about (), although the half-life of lithium-3 is yet to be determined, and is likely to be much shorter, like helium-2 (diproton) which undergoes proton emission within s. Lithium-7 and lithium-6 are two of the primordial nuclides that wer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thermonuclear Weapon
A thermonuclear weapon, fusion weapon or hydrogen bomb (H bomb) is a second-generation nuclear weapon design. Its greater sophistication affords it vastly greater destructive power than first-generation nuclear bombs, a more compact size, a lower mass, or a combination of these benefits. Characteristics of nuclear fusion reactions make possible the use of non-fissile depleted uranium as the weapon's main fuel, thus allowing more efficient use of scarce fissile material such as uranium-235 () or plutonium-239 (). The first full-scale thermonuclear test was carried out by the United States in 1952; the concept has since been employed by most of the world's nuclear powers in the design of their weapons. Modern fusion weapons consist essentially of two main components: a nuclear fission primary stage (fueled by or ) and a separate nuclear fusion secondary stage containing thermonuclear fuel: the heavy hydrogen isotopes deuterium and tritium, or in modern weapons lithium deuteride ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leonard Rotherham
Leonard "Larry" Rotherham CBE FRS (31 August 1913 – 21 March 2001) was a British metallurgist and vice chancellor of the University of Bath. He led the team which investigated the de Havilland Comet airliner crashes caused by metal fatigue around the windows. He was educated at Herbert Strutt School, Belper and University College London. He worked as a physicist at Brown Firth Research Laboratories on high melting point alloys. from 1935 until 1946 when he was appointed at head of the Metallurgy Department at the RAE Farnborough. He remained there until 1954 when he was appointed director of Research and Development of the United Kingdom Atomic Energy Authority's Industrial Group based at Risley. He became the member for Research on the CEGB in 1958, a role he remained in until 1969 when he was appointed vice chancellor of the University of Bath until his retirement in 1976. Following his retirement he became a governor of Imperial College, London and a director of Chemr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Capenhurst
Capenhurst is a village and civil parish in Chester in the unitary authority of Cheshire West and Chester and the ceremonial county of Cheshire England. According to the 2001 Census, Capenhurst had a population of 237, increasing to 380 at the 2011 Census. History Capenhurst was a township in Shotwick Parish of the Wirral Hundred and included parts of the hamlets of Dunkirk and Two Mills. The population was 147 in 1801, 148 in 1851, 159 in 1901, 253 in 1951 and 237 in 2001. Detail Capenhurst is home to a uranium enrichment plant owned by Urenco Group. A new Tails Management Facility is expected to be commissioned in 2018. Adjacent, but separate from this is the Capenhurst Technology Park. This contains EA Technology, (previously the Electricity Council Research Centre prior to privatisation of the UK electricity supply industry), and other spin-off companies. Capenhurst village has its own railway station, on the Wirral Line of the Merseyrail network. The local amateur foo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uranium Centrifuge
A gas centrifuge is a device that performs isotope separation of gases. A centrifuge relies on the principles of centrifugal force accelerating molecules so that particles of different masses are physically separated in a gradient along the radius of a rotating container. A prominent use of gas centrifuges is for the separation of uranium-235 (235U) from uranium-238 (238U). The gas centrifuge was developed to replace the gaseous diffusion method of uranium-235 extraction. High degrees of separation of these isotopes relies on using many individual centrifuges arranged in series, that achieve successively higher concentrations. This process yields higher concentrations of uranium-235 while using significantly less energy compared to the gaseous diffusion process. Centrifugal process The centrifuge relies on the force resulting from centrifugal acceleration to separate molecules according to their mass, and can be applied to most fluids. The dense (heavier) molecules move towards t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gaseous Diffusion
Gaseous diffusion is a technology used to produce enriched uranium by forcing gaseous uranium hexafluoride (UF6) through semipermeable membranes. This produces a slight separation between the molecules containing uranium-235 (235U) and uranium-238 (238U). By use of a large cascade of many stages, high separations can be achieved. It was the first process to be developed that was capable of producing enriched uranium in industrially useful quantities, but is nowadays considered obsolete, having been superseded by the more-efficient gas centrifuge process. Gaseous diffusion was devised by Francis Simon and Nicholas Kurti at the Clarendon Laboratory in 1940, tasked by the MAUD Committee with finding a method for separating uranium-235 from uranium-238 in order to produce a bomb for the British Tube Alloys project. The prototype gaseous diffusion equipment itself was manufactured by Metropolitan-Vickers (MetroVick) at Trafford Park, Manchester, at a cost of £150,000 for four units, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isotopes Of Uranium
Uranium (92U) is a naturally occurring radioactive element that has no stable isotope. It has two primordial isotopes, uranium-238 and uranium-235, that have long half-lives and are found in appreciable quantity in the Earth's crust. The decay product uranium-234 is also found. Other isotopes such as uranium-233 have been produced in breeder reactors. In addition to isotopes found in nature or nuclear reactors, many isotopes with far shorter half-lives have been produced, ranging from 214U to 242U (with the exceptions of 220U and 241U). The standard atomic weight of natural uranium is . Naturally occurring uranium is composed of three major isotopes, uranium-238 (99.2739–99.2752% natural abundance), uranium-235 (0.7198–0.7202%), and uranium-234 (0.0050–0.0059%). All three isotopes are radioactive (i.e., they are radioisotopes), and the most abundant and stable is uranium-238, with a half-life of (close to the age of the Earth). Uranium-238 is an alpha emitter, decayi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atomic Energy Research Establishment
The Atomic Energy Research Establishment (AERE) was the main Headquarters, centre for nuclear power, atomic energy research and development in the United Kingdom from 1946 to the 1990s. It was created, owned and funded by the British Government. A number of early research reactors were built here starting with GLEEP in 1947 to provide the underlying science and technology behind the design and building of Britain's nuclear reactors such as the Windscale Piles and Calder Hall nuclear power station. To support this an extensive array of research and design laboratories were built to enable research into all aspects of nuclear reactor and fuel design, and the development of pilot plants for fuel reprocessing. The site became a major employer in the Oxford area. In the 1990s demand for government-led research had significantly decreased and the site was subsequently gradually diversified to allow private investment, and was known from 2006 as the Harwell Science and Innovati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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