The Leninabad Mining and Chemical Combine was a uranium processing plant in the Soviet Union. [1] It was founded in 1945 in Leninabad, Tajikistan, as a hydro-metallurgical uranium enterprise to exploit uranium deposits across Central Asia. [2] It was the first plant in the Soviet Union to produce yellowcake (a concentrated form of uranium). [3]
The plant provided material for the Soviet Union's defense and power industries, and contributed to the production of its first nuclear bomb test. [4] By 1953, it annually processed up to 1,000,000 tons of uranium ore. Operations stopped in 1992 when uranium mining ceased in Tajikistan. The plant left an environmental impact by dispersing radioactive waste into the surrounding areas, which has posed health hazards to nearby communities. Its successor, IA Vostokredmet, focuses on underground metal heap leaching. [5] [6]
The origins of the plant trace back to 1925, when a uranium deposit was discovered in Taboshary. [7] In 1943, an experimental radium production center was established near Leninabad. [8] By resolution of the State Defense Committee, the plant was established on May 15, 1945. [9] [10] In 1946, Chkalovsk was built within 10 kilometers of the plant [11] to support it. [12] [13] During the Soviet period, it was a strategically important location and classified as a closed city. The Leninabad Mining and Chemical Combine comprised seven mines and five processing plants [14] for the extraction and enrichment of uranium ore, [15] becoming the first Soviet plant to produce yellowcake. [3]
The uranium ore was mined domestically from deposits such as Adrasmon and Taboshar in Tajikistan, [16] as well as from neighboring regions including Kyzyl-Jhar, Mayluu-Suu, Shekaftar, Töömoyun in Kyrgyzstan, [17] [18] and the Fergana Valley. [2] Most of the mining and transportation operations were performed manually, [19] with ore transported by donkeys and camels along the trails of the Pamir Mountains. [20] After processing, the enriched uranium was transported to a facility in the Ural region. [21]
From 1945 to 1950, the plant also treated uranium concentrates imported from East Germany, Bulgaria, Poland, and Czechoslovakia, making it a hub for Soviet uranium enrichment. [22] By 1947, it had processed 176,600 tons of uranium ore, and 66 tons of uranium, [23] producing yellowcake for Soviet nuclear power [24] and the production of the Soviet Union's first atomic bomb test. [25] [26] [23] By 1953, its annual processing capacity had expanded to process 1,000,000 tons of uranium ore to produce over 400 tons of uranium. [27]
Following the dissolution of the Soviet Union in 1991, and the cessation of uranium mining in Tajikistan in 1992, IA Vostokredmet succeeded the Leninabad Mining and Chemical Combine, and specializes in heap leaching of ferromolybdenum, gold, and silver. [5] [6] [28]
Uranium waste was returned to the rural spaces, and the valuable material was transported to Kazakhstan and Russia. [29] The plant's operations dispersed approximately 550 million tons of radioactive waste across nearby settlements, and polluted at least 180 hectares of land. [30] [31] Among the most notable tailing sites is the Digmai dump, located a few kilometers from Khujand, in the plains, posing an environmental threat. [32] Unaware of uranium dangers, Chkalovsk residents housed livestock on waste sites and learned the risks when sheep drinking pond water collapsed and died. [33]
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 radioactively decays, usually by emitting an alpha particle. The half-life of this decay varies between 159,200 and 4.5 billion years for different isotopes, making them useful for dating the age of the Earth. The most common isotopes in natural uranium are uranium-238 and uranium-235. Uranium has the highest atomic weight of the primordially occurring elements. Its density is about 70% higher than that of lead and slightly lower than that of gold or tungsten. It occurs naturally in low concentrations of a few parts per million in soil, rock and water, and is commercially extracted from uranium-bearing minerals such as uraninite.
Radioactive waste is a type of hazardous waste that contains radioactive material. It is a result of many activities, including nuclear medicine, nuclear research, nuclear power generation, nuclear decommissioning, rare-earth mining, and nuclear weapons reprocessing. The storage and disposal of radioactive waste is regulated by government agencies in order to protect human health and the environment.
Uraninite, also known as pitchblende, is a radioactive, uranium-rich mineral and ore with a chemical composition that is largely UO2 but because of oxidation typically contains variable proportions of U3O8. Radioactive decay of the uranium causes the mineral to contain oxides of lead and trace amounts of helium. It may also contain thorium and rare-earth elements.
Sillamäe is a town in Ida-Viru County in the northereastern part of Estonia, on the southern coast of the Gulf of Finland. It has a population of 12,439 and covers an area of 10.54 km2. Sillamäe is located at the mouth of Sõtke River. Its population is predominantly Russian-speaking.
Yellowcake is a type of powdered uranium concentrate obtained from leach solutions, in an intermediate step in the processing of uranium ores. It is a step in the processing of uranium after it has been mined but before fuel fabrication or uranium enrichment. Yellowcake concentrates are prepared by various extraction and refining methods, depending on the types of ores. Typically, yellowcakes are obtained through the milling and chemical processing of uranium ore, forming a coarse powder that has a pungent odor, is insoluble in water, and contains about 80% uranium oxide, which melts at approximately 2880 °C.
The Soviet atomic bomb project was authorized by Joseph Stalin in the Soviet Union to develop nuclear weapons during and after World War II.
Mayluu-Suu is a mining town in the Jalal-Abad Region of southern Kyrgyzstan. It is a city of regional significance, not part of a district. Its area is 120 square kilometres (46 sq mi), and its resident population was 25,892 in 2021. It has been economically depressed since the fall of the Soviet Union. From 1946 to 1968 the Zapadnyi Mining and Chemical Combine in Mayluu-Suu mined and processed more than 10,000 short tons (9,100 t) of uranium ore for the Soviet nuclear program. Uranium mining and processing is no longer economical, leaving much of the local population of about 20,000 without meaningful work. The town was classified as one of the Soviet government's secret cities, officially known only as "Mailbox 200". Mayluu-Suu consists of the town proper, the urban-type settlement Kök-Tash and the villages Sary-Bee, Kögoy and Kara-Jygach.
Shinkolobwe, or Kasolo, or Chinkolobew, or Shainkolobwe, was a radium and uranium mine in the Haut-Katanga Province of the Democratic Republic of the Congo (DRC), located 20 km (12.4 mi) west of Likasi, 20 km (12.4 mi) south of Kambove, and about 145 km (90.1 mi) northwest of Lubumbashi.
Uranium mining is the process of extraction of uranium ore from the ground. Over 50,000 tons of uranium were produced in 2019. Kazakhstan, Canada, and Australia were the top three uranium producers, respectively, and together account for 68% of world production. Other countries producing more than 1,000 tons per year included Namibia, Niger, Russia, Uzbekistan and China. Nearly all of the world's mined uranium is used to power nuclear power plants. Historically uranium was also used in applications such as uranium glass or ferrouranium but those applications have declined due to the radioactivity and toxicity of uranium and are nowadays mostly supplied with a plentiful cheap supply of depleted uranium which is also used in uranium ammunition. In addition to being cheaper, depleted uranium is also less radioactive due to a lower content of short-lived 234
U and 235
U than natural uranium.
Uranium tailings or uranium tails are a radioactive waste byproduct (tailings) of conventional uranium mining and uranium enrichment. They contain the radioactive decay products from the uranium decay chains, mainly the U-238 chain, and heavy metals. Long-term storage or disposal of tailings may pose a danger for public health and safety.
The now-defunct Prydniprovsky Chemical Plant in the city of Kamianske, Ukraine, processed uranium ore for the Soviet nuclear program from 1948 through 1991, preparing yellowcake.
Buston is a town in northern Tajikistan. It is located in Sughd Region, between the cities of Khujand and Ghafurov. Buston is a city of regional subordination, and is not part of a district.
Tajikistan has rich deposits of gold, silver, and antimony. The largest silver deposits are in Sughd Province, where Tajikistan's largest gold mining operation is also located. Russia's Norilsk nickel company has explored a large new silver deposit at Bolshoy Kanimansur. More than 400 mineral deposits of some 70 different minerals have been discovered in Tajikistan, including strontium, tungsten, molybdenum, bismuth, salt, lead, zinc, fluorspar, and mercury. These minerals have been found suitable for mining. Uranium, an important mineral in the Soviet era, remains in some quantity but is no longer being extracted. The Tajikistan Aluminium Company (TALCO), an aluminium smelter, is the country's only large-scale production enterprise in the mining sector. Tajikistan hosts the annual Mining World Tajikistan, an international exhibition on mining in Dushanbe.
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 in Chelyabinsk Oblast, Russian SFSR, Soviet Union.
The Industrial Association Eastern Combine for Rare Metals is an industrial complex in the western part of the Fergana Valley, Tajikistan. It is the country's first raw materials base, incorporating seven mines and five plants.
The Jaduguda Mine is a uranium mine in Jaduguda village in the Purbi Singhbhum district of the Indian state of Jharkhand. It commenced operation in 1967 and was the first uranium mine in India. The deposits at this mine were discovered in 1951. As of March 2012, India possesses eight functional uranium mines, including this Jaduguda Mine. A new mine, Tummalapalle uranium mine is discovered and mining is going to start from it.
Namibia has one of the richest uranium mineral reserves in the world. There are currently two large operating mines in the Erongo Region and various exploration projects planned to advance to production in the next few years.
The world's largest producer of uranium is Kazakhstan, which in 2019 produced 43% of the world's mining output. Canada was the next largest producer with a 13% share, followed by Australia with 12%. Uranium has been mined in every continent except Antarctica.
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A yellowcake boomtown also known as a uranium boomtown, is a town or community that rapidly increases in population and economics due to the discovery of uranium ore-bearing minerals, and the development of uranium mining, milling or enrichment activities. After these activities cease, the town "goes bust" and the population decreases rapidly.
the Vostokredmet plant in Chkalovsk, the successor of the Soviet Leninabad Mining and Chemical Combine
The Industrial Association Eastern Combine for Rare-Earth Metals (IA Vostokredmet) was established on the basis of the Leninabad Mining and Chemical Combine
[Resolution of the State Defense Committee of the USSR on the creation of the Mining and Chemical Combine No. 6 was adopted in the first days after the end of the Great Patriotic War – 15 May 1945.]
[It consisted of seven mines and five enrichment plants.]
[The complex was composed of mines and plants for uranium extraction from ores and production of concentrates.]
Mines in Taboshar and Adrasman provided uranium to the Leninabad Mining and Chemical Combine
Tyuya-Muyun Mine - Enterprise No. 15", "The main facilities for the extraction and processing of radioactive ores in Kyrgyzstan include the enterprises of the former Leninabad Mining and Chemical Combine in Mailuu-Suu, Shekaftar, Kyzyl-Dzhar;
uranium ore was brought to the processing plant through the Pamir mountain pathways in bags attached to donkeys and camels.
[it was enriched and sent to the factory in the Urals.]
to produce yellowcake for the Soviet nuclear power
Over the years, approximately 550 million tons of radioactive waste were spread at nearby habitations, polluting at least 180 ha of land.