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Ozyorsk, Chelyabinsk Oblast
Ozyorsk or Ozersk (russian: Озёрск) is a closed city in Chelyabinsk Oblast, Russia. The population was: Law #287-ZO specifies that the borders of Ozyorsky Urban Okrug match the borders of the closed administrative-territorial formation of the town of Ozyorsk. History The town was founded on the shores of Lake Irtyash in 1947. Until 1994, it was known as Chelyabinsk-65, and even earlier, as Chelyabinsk-40 (the digits are the last digits of the postal code, and the name is that of the nearest big city, which was a common practice of giving names to closed towns). Codenamed City 40, Ozersk was the birthplace of the Soviet nuclear weapons program after the Second World War. In 1994, it was granted town status and renamed Ozyorsk. Administrative and municipal status Within the framework of administrative divisions, it is, together with six rural localities, incorporated as the Town of Ozyorsk—an administrative unit with the status equal to that of the districts.Resolutio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chelyabinsk Oblast
Chelyabinsk Oblast (russian: Челя́бинская о́бласть, ''Chelyabinskaya oblast'') is a federal subject (an oblast) of Russia in the Ural Mountains region, on the border of Europe and Asia. Its administrative center is the city of Chelyabinsk. Its population is 3,476,217. ( 2010 Census). History During the Middle Ages, Bashkir tribes inhabited the Southern Urals; they formed part of the Golden Horde, Nogai Horde, and smaller Bashkir unions. The Tsardom of Russia incorporated the area in the late 16th century. However, Russian colonization of the region only began in the 18th century, with the establishment of a system of fortresses and trade posts on the then-Russian border by the in 1734. Many cities of Chelyabinsk Oblast, including the city of Chelyabinsk itself, trace their history back to those forts. In 1743 the Chelyabinsk fortress became a center of the , a constituent part of the Orenburg Governorate (a direct successor of the Orenburg Expedition). Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Icebreaker
An icebreaker is a special-purpose ship or boat designed to move and navigate through ice-covered waters, and provide safe waterways for other boats and ships. Although the term usually refers to ice-breaking ships, it may also refer to smaller vessels, such as the icebreaking boats that were once used on the canals of the United Kingdom. For a ship to be considered an icebreaker, it requires three traits most normal ships lack: a strengthened hull, an ice-clearing shape, and the power to push through sea ice. Icebreakers clear paths by pushing straight into frozen-over water or pack ice. The bending strength of sea ice is low enough that the ice breaks usually without noticeable change in the vessel's trim. In cases of very thick ice, an icebreaker can drive its bow onto the ice to break it under the weight of the ship. A buildup of broken ice in front of a ship can slow it down much more than the breaking of the ice itself, so icebreakers have a specially designed hull to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kyshtym Disaster
The Kyshtym disaster, sometimes referred to as the Mayak disaster or Ozyorsk disaster in newer sources, was a radioactive contamination accident that occurred on 29 September 1957 at Mayak, a plutonium production site for nuclear weapons and nuclear fuel reprocessing plant located in the closed city of Chelyabinsk-40 (now Ozyorsk) in Chelyabinsk Oblast, Russian SFSR, Soviet Union. The disaster is the third-worst nuclear incident (by radioactivity released) after the Chernobyl disaster and the Fukushima Daiichi disaster. It measured as a Level 6 disaster on the International Nuclear Event Scale (INES), making it the third-highest on the INES (which ranks by population impact), behind the Chernobyl disaster, which resulted in the evacuation of 335,000 people, and the Fukushima Daiichi disaster, which resulted in the evacuation of 154,000 people; the Chernobyl disaster and the Fukushima Daiichi disaster are both Level 7 disasters on the INES. At least 22 villages were exposed to r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chernobyl
Chernobyl ( , ; russian: Чернобыль, ) or Chornobyl ( uk, Чорнобиль, ) is a partially abandoned city in the Chernobyl Exclusion Zone, situated in the Vyshhorod Raion of northern Kyiv Oblast, Ukraine. Chernobyl is about north of Kyiv, and southwest of the Belarusian city of Gomel. Before its evacuation, the city had about 14,000 residents, while around 1,000 people live in the city today. First mentioned as a ducal hunting lodge in 1193, the city has changed hands multiple times over the course of history. Jews moved into the city in the 16th century, and a now-defunct monastery was established in the area in 1626. By the end of the 18th century, Chernobyl was a major centre of Hasidic Judaism under the Twersky Dynasty, who left Chernobyl after the city was subject to pogroms in the early 20th century. The Jewish community was later murdered during the Holocaust. Chernobyl was chosen as the site of Ukraine's first nuclear power plant in 1972, locat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Soviet Atomic Bomb Program
The Soviet atomic bomb project was the classified research and development program that was authorized by Joseph Stalin in the Soviet Union to develop nuclear weapons during and after World War II. Although the Soviet scientific community discussed the possibility of an atomic bomb throughout the 1930s, going as far as making a concrete proposal to develop such a weapon in 1940, the full-scale program was not initiated and prioritized until Operation Barbarossa. Because of the conspicuous silence of the scientific publications on the subject of nuclear fission by German, American, and British scientists, Russian physicist Georgy Flyorov suspected that the Allied powers had secretly been developing a "superweapon" since 1939. Flyorov wrote a letter to Stalin urging him to start this program in 1942. Initial efforts were slowed due to the German invasion of the Soviet Union and remained largely composed of the intelligence gathering from the Soviet spy rings working in the U. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Weapons-grade Plutonium
Weapons-grade nuclear material is any fissionable nuclear material that is pure enough to make a nuclear weapon or has properties that make it particularly suitable for nuclear weapons use. Plutonium and uranium Uranium is a chemical element with the symbol U and atomic number 92. It is a silvery-grey metal in the actinide series of the periodic table. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons. Uranium is weak ... in grades normally used in nuclear weapons are the most common examples. (These nuclear materials have special nuclear material, other categorizations based on their purity.) Only fissile isotopes of certain elements have the Critical mass#Critical mass of a bare sphere, potential for use in nuclear weapons. For such use, the concentration of fissile isotopes uranium-235 and plutonium-239 in the element used must be sufficiently high. Uranium from natural sources is enriched by isotope separation, and plutonium is produce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Industrial Pollution
Pollution is the introduction of contaminants into the natural environment that cause adverse change. Pollution can take the form of any substance (solid, liquid, or gas) or energy (such as radioactivity, heat, sound, or light). Pollutants, the components of pollution, can be either foreign substances/energies or naturally occurring contaminants. Although environmental pollution can be caused by natural events, the word pollution generally implies that the contaminants have an anthropogenic source – that is, a source created by human activities. Pollution is often classed as point source or nonpoint source pollution. In 2015, pollution killed nine million people worldwide (one in six deaths). This remained unchanged in 2019, with little real progress against pollution being identifiable. Air pollution accounted for of these earlier deaths. Major forms of pollution include air pollution, light pollution, litter, noise pollution, plastic pollution, soil contamination, radioacti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atomic Bombs
A nuclear weapon is an explosive device that derives its destructive force from nuclear reactions, either fission (fission bomb) or a combination of fission and fusion reactions ( thermonuclear bomb), producing a nuclear explosion. Both bomb types release large quantities of energy from relatively small amounts of matter. The first test of a fission ("atomic") bomb released an amount of energy approximately equal to . The first thermonuclear ("hydrogen") bomb test released energy approximately equal to . Nuclear bombs have had yields between 10 tons TNT (the W54) and 50 megatons for the Tsar Bomba (see TNT equivalent). A thermonuclear weapon weighing as little as can release energy equal to more than . A nuclear device no larger than a conventional bomb can devastate an entire city by blast, fire, and radiation. Since they are weapons of mass destruction, the proliferation of nuclear weapons is a focus of international relations policy. Nuclear weapons have been deployed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cold War
The Cold War is a term commonly used to refer to a period of geopolitical tension between the United States and the Soviet Union and their respective allies, the Western Bloc and the Eastern Bloc. The term '' cold war'' is used because there was no large-scale fighting directly between the two superpowers, but they each supported major regional conflicts known as proxy wars. The conflict was based around the ideological and geopolitical struggle for global influence by these two superpowers, following their temporary alliance and victory against Nazi Germany and Imperial Japan in 1945. Aside from the nuclear arsenal development and conventional military deployment, the struggle for dominance was expressed via indirect means such as psychological warfare, propaganda campaigns, espionage, far-reaching embargoes, rivalry at sports events, and technological competitions such as the Space Race. The Western Bloc was led by the United States as well as a number of other First W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Richland, Washington
Richland () is a city in Benton County, Washington, United States. It is located in southeastern Washington at the confluence of the Yakima and the Columbia Rivers. As of the 2020 census, the city's population was 60,560. Along with the nearby cities of Pasco and Kennewick, Richland is one of the Tri-Cities, and is home to the Hanford nuclear site. History For centuries, the village of Chemna stood at the mouth of the current Yakima River. Today that village site is called Columbia Point. From this village, the Wanapum, Yakama and Walla Walla Indians harvested the salmon runs entering the Yakima River. Captain William Clark of the Lewis and Clark Expedition visited the mouth of the Yakima River on October 17, 1805. Formative years In 1904–1905, W.R. Amon and his son Howard purchased and proposed a town site on the north bank of the Yakima River. Postal authorities approved the designation of this town site as Richland in 1905, naming it for Nelson Rich, a state legislat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Concrete
Concrete is a composite material composed of fine and coarse aggregate bonded together with a fluid cement (cement paste) that hardens (cures) over time. Concrete is the second-most-used substance in the world after water, and is the most widely used building material. Its usage worldwide, ton for ton, is twice that of steel, wood, plastics, and aluminum combined. Globally, the ready-mix concrete industry, the largest segment of the concrete market, is projected to exceed $600 billion in revenue by 2025. This widespread use results in a number of environmental impacts. Most notably, the production process for cement produces large volumes of greenhouse gas emissions, leading to net 8% of global emissions. Other environmental concerns include widespread illegal sand mining, impacts on the surrounding environment such as increased surface runoff or urban heat island effect, and potential public health implications from toxic ingredients. Significant research and development is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salamander (legendary Creature)
The salamander is an amphibian of the order Urodela which, as with many real creatures, often has been ascribed fantastic and sometimes occult qualities by pre-modern authors (as in the allegorical descriptions of animals in medieval bestiaries) not possessed by the real organism. The legendary salamander is often depicted as a typical salamander in shape with a lizard-like form, but is usually ascribed an affinity with fire, sometimes specifically elemental fire. Classical, Medieval, and Renaissance lore This legendary creature embodies the fantastic qualities that ancient and medieval commentators ascribed to the natural salamander. Many of these qualities are rooted in verifiable traits of the natural creature but often exaggerated. A large body of legend, mythology, and symbolism has developed around this creature over the centuries. Carl Linnaeus in the 10th edition of ''Systema Naturae'' of 1758 established the scientific description of the salamander and noted the chief char ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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