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R4 Nuclear Reactor
History R4 nuclear reactor was a nuclear reactor built at Marviken, Vikbolandet and the fourth nuclear reactor built in Sweden. It was heavy water moderated and intended for the dual role of 130MWe of power generation as well as plutonium Plutonium is a radioactive chemical element with the symbol Pu and atomic number 94. It is an actinide metal of silvery-gray appearance that tarnishes when exposed to air, and forms a dull coating when oxidized. The element normally exhibi ... production. It had a central role in the Swedish nuclear weapon programme. During the mid 1960s, the social democratic government officially abandoned the project of designing Swedish nuclear weapons and the Marviken plant became derelict. It was never loaded with fuel, and the project was cancelled in 1970. Experimental site The situation that the reactor was nearly completed, but never loaded with fuel, made it possible to use the plant for advanced international experiments during late 1970 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuclear Reactor
A nuclear reactor is a device used to initiate and control a fission nuclear chain reaction or nuclear fusion reactions. Nuclear reactors are used at nuclear power plants for electricity generation and in nuclear marine propulsion. Heat from nuclear fission is passed to a working fluid (water or gas), which in turn runs through steam turbines. These either drive a ship's propellers or turn electrical generators' shafts. Nuclear generated steam in principle can be used for industrial process heat or for district heating. Some reactors are used to produce isotopes for medical and industrial use, or for production of weapons-grade plutonium. , the International Atomic Energy Agency reports there are 422 nuclear power reactors and 223 nuclear research reactors in operation around the world. In the early era of nuclear reactors (1940s), a reactor was known as a nuclear pile or atomic pile (so-called because the graphite moderator blocks of the first reactor were placed into a tall pi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vikbolandet
Vikbolandet is a large peninsula east of Norrköping city in Östergötland, Sweden. The area is limited by Bråviken to the north, Slätbaken to the south and the Baltic Sea to the east. The biggest population center is Östra Husby with a population of 868, followed by Ljunga (pop 751) and Arkösund (pop 172) (pop figures as of 2015) on the Baltic Sea coast at the far east of the peninsula. The areas to the west (towards Norrköping city) is mostly flat farmland while the areas to the east is mostly wooded with intermixed farmland. Ferries run across Bråviken north to Kolmården Kolmården () is a long and wide densely forested rocky ridge that separates the Swedish provinces of Södermanland and Östergötland, two of the country's main agricultural areas, from each other, and in historic times, along with Tylöskog and ... and south across Slätbaken. According to the 2006 census, the whole area had a population of 6,751. Famous residents * Malin Baryard - Eque ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sweden
Sweden, formally the Kingdom of Sweden,The United Nations Group of Experts on Geographical Names states that the country's formal name is the Kingdom of SwedenUNGEGN World Geographical Names, Sweden./ref> is a Nordic country located on the Scandinavian Peninsula in Northern Europe. It borders Norway to the west and north, Finland to the east, and is connected to Denmark in the southwest by a bridgetunnel across the Öresund. At , Sweden is the largest Nordic country, the third-largest country in the European Union, and the fifth-largest country in Europe. The capital and largest city is Stockholm. Sweden has a total population of 10.5 million, and a low population density of , with around 87% of Swedes residing in urban areas in the central and southern half of the country. Sweden has a nature dominated by forests and a large amount of lakes, including some of the largest in Europe. Many long rivers run from the Scandes range through the landscape, primarily ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neutron Moderator
In nuclear engineering, a neutron moderator is a medium that reduces the speed of fast neutrons, ideally without capturing any, leaving them as thermal neutrons with only minimal (thermal) kinetic energy. These thermal neutrons are immensely more susceptible than fast neutrons to propagate a nuclear chain reaction of uranium-235 or other fissile isotope by colliding with their atomic nucleus. Water (sometimes called "light water" in this context) is the most commonly used moderator (roughly 75% of the world's reactors). Solid graphite (20% of reactors) and heavy water (5% of reactors) are the main alternatives. Beryllium has also been used in some experimental types, and hydrocarbons have been suggested as another possibility. Moderation Neutrons are normally bound into an atomic nucleus, and do not exist free for long in nature. The unbound neutron has a half-life of 10 minutes and 11 seconds. The release of neutrons from the nucleus requires exceeding the binding energy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plutonium
Plutonium is a radioactive chemical element with the symbol Pu and atomic number 94. It is an actinide metal of silvery-gray appearance that tarnishes when exposed to air, and forms a dull coating when oxidized. The element normally exhibits six allotropes and four oxidation states. It reacts with carbon, halogens, nitrogen, silicon, and hydrogen. When exposed to moist air, it forms oxides and hydrides that can expand the sample up to 70% in volume, which in turn flake off as a powder that is pyrophoric. It is radioactive and can accumulate in bones, which makes the handling of plutonium dangerous. Plutonium was first synthetically produced and isolated in late 1940 and early 1941, by a deuteron bombardment of uranium-238 in the cyclotron at the University of California, Berkeley. First, neptunium-238 ( half-life 2.1 days) was synthesized, which subsequently beta-decayed to form the new element with atomic number 94 and atomic weight 238 (half-life 88 years). Since ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Swedish Nuclear Weapon Programme
After World War II, Sweden considered building nuclear weapons to defend themselves against an offensive assault from the Soviet Union. From 1945 to 1972 the government ran a clandestine nuclear weapons program under the guise of civilian defense research at the Swedish National Defence Research Institute (FOA). By the late 1950s the work had reached the point where underground testing was feasible. However, at this time the Riksdag prohibited research and development of nuclear weapons, pledging that research should be done only for the purpose of defense against nuclear attack. They reserved the right to continue development of offensive weapons in the future. In recent years declassified documents have shown that Sweden was much closer to possessing the nuclear bomb than previously thought. By 1965 most of the bomb was already built and another 6 months would have been needed to arm it, had the project been given the green light. Another two bombs would have been built sh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Social Democratic Party (Sweden)
The Swedish Social Democratic Party, formally the Swedish Social Democratic Workers' Party ( sv, Sveriges socialdemokratiska arbetareparti ; S/SAP), usually referred to as The Social Democrats ( sv, link=no, Socialdemokraterna ), is a social-democratic List of political parties in Sweden, political party in Sweden. Founded in 1889, the SAP is the country's oldest and currently largest party. From the mid-1930s to the 1980s, the Social Democratic Party won more than 40% of the vote. From 1932 to 1976, the SAP was continuously in government. Most recently, the party was heading the government from 2014 to 2022. It participates in elections as "The Workers' Party – The Social Democrats" ( sv, link=no, Arbetarepartiet – Socialdemokraterna ). History Founded in 1889 as a member of the Second International, a split occurred in 1917 when the left socialists split from the Social Democrats to form the Swedish Social Democratic Left Party (later the Communist Party of Sweden and n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuclear Energy Agency
The Nuclear Energy Agency (NEA) is an intergovernmental agency that is organized under the Organisation for Economic Co-operation and Development (OECD). Originally formed on 1 February 1958 with the name European Nuclear Energy Agency (ENEA)—the United States participated as an Associate Member—the name was changed on 20 April 1972 to its current name after Japan became a member. The mission of the NEA is to "assist its member countries in maintaining and further developing, through international co-operation, the scientific, technological and legal bases required for the safe, environmentally friendly and economical use of nuclear energy for peaceful purposes." Members NEA currently consists of 34 countries from Europe, North America and the Asia-Pacific region. In 2021, Bulgaria accessioned to NEA as its most recent member. In 2022, following Russia's invasion of Ukraine, Russia's membership was suspended. * * * * * * * * * * * * * * * * * * * * * * * * * (suspended ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lars Wilderäng
Lars is a common male name in Scandinavian countries. Origin ''Lars'' means "from the city of Laurentum". Lars is derived from the Latin name Laurentius, which means "from Laurentum" or "crowned with laurel". A homonymous Etruscan name was borne by several Etruscan kings, and later used as a last name by the Roman Lartia family. The etymology of the Etruscan name is unknown. People * Lars (bishop), 13th-century Archbishop of Uppsala, Sweden *Lars Kristian Abrahamsen (1855–1921), Norwegian politician *Lars Ahlfors (1907–1996), Finnish Fields Medal recipient *Lars Amble (1939–2015), Swedish actor and director *Lars Herminius Aquilinus, ancient Roman consul *Lars Bak (born 1980), Danish road bicycle racer *Lars Bak (computer programmer) (born 1965), Danish computer programmer *Lars Bender (born 1989), German footballer *Lars Christensen (1884–1965), Norwegian shipowner, whaling magnate and philanthropist *Lars Magnus Ericsson (1846–1926), Swedish inventor * Lars Eriksson ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heavy Water Reactors
Heavy may refer to: Measures * Heavy (aeronautics), a term used by pilots and air traffic controllers to refer to aircraft capable of 300,000 lbs or more takeoff weight * Heavy, a characterization of objects with substantial weight * Heavy, a type of strength of Scottish beer * Heavy reader, a reader of 21 or more books per year, according to the Pew Internet and American Life Project report, "The Rise of E-Reading" (2012) Arts, entertainment, and media Music Groups * The Heavy (band), a rock band from England Albums * ''Heavy'' (Heavy D album), 1999 * ''Heavy'' (Iron Butterfly album), a 1968 album by Iron Butterfly * ''Heavy'' (Bin-Jip album), the second studio album by Bin-Jip Songs * "Heavy" (Collective Soul song), 1999 * "Heavy" (Lauri Ylönen song), 2011 * "Heavy" (Linkin Park song), 2017 * "Heavy" (Anne-Marie song), 2017 * "Heavy", by Cxloe, 2020 * "Heavy", by Flight Facilities featuring Your Smith, 2021 * "Heavy", by Peach PRC, 2021 Television * ''Heavy'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unfinished Nuclear Reactors
Unfinished may refer to: *Unfinished creative work, a work which a creator either chose not to finish or was prevented from finishing. Music * Symphony No. 8 (Schubert) "Unfinished" * Unfinished (album), ''Unfinished'' (album), 2011 album by American singer Jordan Knight * Unfinished (Kotoko song), "Unfinished" (Kotoko song), stylized "→unfinished→", 2012 * Unfinished (Mandisa song), "Unfinished" (Mandisa song), 2017 * "Unfinished", song by Stone Sour from the 2010 album ''Audio Secrecy'' * "Unfinished", song by Mineral from the 1998 album ''EndSerenading'' Television and film * Unfinished (How I Met Your Mother), "Unfinished" (''How I Met Your Mother''), 2010 television show episode * Unfinished (film), ''Unfinished'' (film), 2018 South Korean film Literature * Unfinished (book), ''Unfinished'' (book), a 2021 memoir by Priyanka Chopra See also * * Unfinished symphony * Unfinished building * Finished (other) {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
