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LWGR
The light water graphite reactor (LWGR) is a design of nuclear reactor that uses purified graphite as a neutron moderator and light water (H2O) as a liquid coolant. Due to the superior moderating properties of graphite, natural uranium can be used as a fuel, avoiding enrichment. The design was developed during the Manhattan Project, in a horizontal layout, first used in the 1944 B Reactor, also the world's first large-scale reactor. The Project's Hanford Site constructed nine LWGRs in total for plutonium production, used throughout the Cold War. The Soviet Union subsequently developed a vertical design for use in military plutonium production reactors, constructed at Mayak, the Siberian Chemical Combine in Seversk, and the Mining and Chemical Combine in Zhelenogorsk. China's nuclear weapons program also developed two military plutonium production LWGRs. Reactors used for plutonium production in the nuclear weapons programs of the United Kingdom, France, and North Korea used ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Production Reactor
A nuclear reactor is a device used to initiate and control a fission nuclear chain reaction. They are used for commercial electricity, marine propulsion, weapons production and research. Fissile nuclei (primarily uranium-235 or plutonium-239) absorb single neutrons and split, releasing energy and multiple neutrons, which can induce further fission. Reactors stabilize this, regulating neutron absorbers and moderators in the core. Fuel efficiency is exceptionally high; low-enriched uranium is 120,000 times more energy dense than coal. Heat from nuclear fission is passed to a working fluid coolant. In commercial reactors, this drives turbines and electrical generator shafts. Some reactors are used for district heating, and isotope production for medical and industrial use. Following the 1938 discovery of fission, many countries initiated military nuclear research programs. Early subcritical experiments probed neutronics. In 1942, the first artificial critical nu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuclear Reactor
A nuclear reactor is a device used to initiate and control a Nuclear fission, fission nuclear chain reaction. They are used for Nuclear power, commercial electricity, nuclear marine propulsion, marine propulsion, Weapons-grade plutonium, weapons production and Research reactor, research. Fissile material, Fissile nuclei (primarily uranium-235 or plutonium-239) absorb single neutron, neutrons and split, releasing energy and multiple neutrons, which can induce further fission. Reactors stabilize this, regulating Neutron absorber, neutron absorbers and neutron moderator, moderators in the core. Fuel efficiency is exceptionally high; Enriched uranium#Low-enriched uranium (LEU), low-enriched uranium is 120,000 times more energy dense than coal. Heat from nuclear fission is passed to a working fluid Nuclear reactor#By coolant, coolant. In commercial reactors, this drives Turbine, turbines and electrical generator shafts. Some reactors are used for district heating, and isotopes, isoto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mayak
The Mayak Production Association (, , from 'lighthouse') is one of the largest nuclear facilities in the Russian Federation, housing Production reactor, production reactors (''non'' electricity) and a reprocessing plant. The closest settlements are Ozyorsk, Chelyabinsk Oblast, Ozyorsk to the northwest and Novogornyi to the south. Lavrentiy Beria led the Soviet atomic bomb project. He directed the construction of the Mayak plutonium plant in the Southern Urals between 1945 and 1948, in a great hurry and secrecy as part of the Soviet Union's Soviet atomic bomb project, atomic bomb project. The plant had a similar purpose to the Hanford Site of the Manhattan Project. Over 40,000 gulag prisoners and POWs built the factory and the closed nuclear city of Ozyorsk, called at the time by its classified postal code "Chelyabinsk-40". The first reactor, A-1 (nuclear reactor), A-1, operated from 1948 and fuelled the first nuclear test RDS-1 in 1949. During the Cold War, 10 nuclear reactors ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuclear Power
Nuclear power is the use of nuclear reactions to produce electricity. Nuclear power can be obtained from nuclear fission, nuclear decay and nuclear fusion reactions. Presently, the vast majority of electricity from nuclear power is produced by nuclear ''fission'' of uranium and plutonium in nuclear power plants. Nuclear ''decay'' processes are used in niche applications such as radioisotope thermoelectric generators in some space probes such as ''Voyager 2''. Reactors producing controlled fusion power, ''fusion'' power have been operated since 1958 but have yet to generate net power and are not expected to be commercially available in the near future. The first nuclear power plant was built in the 1950s. The global installed nuclear capacity grew to 100GW in the late 1970s, and then expanded during the 1980s, reaching 300GW by 1990. The 1979 Three Mile Island accident in the United States and the 1986 Chernobyl disaster in the Soviet Union resulted in increased regulation and p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beloyarsk Nuclear Power Station
The Beloyarsk Nuclear Power Station (NPS; []) was the third of the Soviet Union, Soviet Union's nuclear plants. It is situated by Zarechny, Sverdlovsk Oblast, Zarechny in Sverdlovsk Oblast, Russia. Zarechny township was created to service the station, which is named after the Beloyarsky District. The closest city is Yekaterinburg. Early reactors Two earlier reactors were constructed at Beloyarsk: an AMB-100 reactor (operational 1964–1983) and an AMB-200 reactor (operational 1967–1989). The first unit used 67 tons of uranium enriched to 1.8%, while the second unit used 50 tons of uranium enriched to 3.0%. The first unit had an indirect steam cycle, while the second had a direct one. Although they were comparable in power to the Shippingport Atomic Power Station, the Soviet planners regarded the Beloyarsk reactors as prototypes. Their main novelty was the use of superheated steam ran through a standard turbine thus resulting in a better efficiency compared to the earl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
A-1 (nuclear Reactor)
The A-1 nuclear reactor was the first Soviet Union, Soviet plutonium production reactor, built and operated at the Mayak Production Association from 1948 for the Soviet atomic bomb project. It was affectionately named "Annushka" by project scientists. Design It was designed as a Light-water reactor, light water-cooled, Nuclear graphite, graphite-Neutron moderator, moderated reactor (LWGR), with an initial power level of 100 MWt (megawatts Watt thermal, thermal). Its design and purpose were similar to the B Reactor, the first industrial-scale US plutonium production reactor. The Soviet atomic bomb project, Soviet nuclear program had Atomic spies, extensive espionage on the Manhattan Project, and program chief Lavrentiy Beria pushed for direct replication of Manhattan designs at every step. Due to concerns that the Mayak facility was in range of US Boeing B-29 Superfortress bombers, the reactor was to be sheltered underground in a pit, similar to F-1. Unlike the US B reactor, wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heavy-water Reactor
A heavy water reactor (HWR) is a type of nuclear reactor which uses heavy water (D2O, deuterium oxide) as a neutron moderator. It may also use this as the coolant, in the case of Pressurized heavy water reactor, pressurized heavy water reactors. Due to heavy water's low neutron absorption cross section, HWRs can operate with natural uranium fuel. History "Atomic pile" experiments were carried out across Europe and North America following the 1938 discovery of nuclear fission. The sole supply of heavy water was from the Vemork hydroelectric power plant in Norway. The world's entire supply had been sent to Paris for experiments, but smuggled to England during the Fall of France. In November 1940, Hans von Halban and Lew Kowarski at the University of Cambridge carried out one of the first heavy water-moderated pile experiments, measuring net neutron production. In 1958, Patrick Blackett wrote about Frédéric Joliot-Curie: "There is little doubt that, had the war not intervened, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Third Front (China)
The Third Front Movement ( zh, s=三线建设, p=Sānxiàn jiànshè) or Third Front Construction was a Chinese government campaign to develop industrial and military facilities in the country's interior. The campaign was motivated by concerns that China's industrial and military infrastructure would be vulnerable in the event of invasion by the Soviet Union or air raids by the United States. The largest development campaign of Mao-era China, it involved massive investment in national defense, technology, basic industries (including manufacturing, mining, metal, and electricity), transportation and other infrastructure investments and was carried out primarily in secret. "Third Front" is a geo-military concept: it is relative to the "First Front" area that is close to the potential war fronts. The Third Front region covered 13 provinces and autonomous regions with its core area in the Northwest (including Shaanxi, Gansu, Ningxia, and Qinghai) and Southwest (including today's ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jiuquan Reactor
Jiuquan, formerly known as Suzhou is a prefecture-level city in the northwesternmost part of Gansu Province in the People's Republic of China. It is more than wide from east to west, occupying , although its built-up area is mostly located in its Suzhou District. Name The city was formerly known as Fulu, which became known as Suzhou (Suchow, Su-chow, &c.) after it became the seat of Su Prefecture under the Sui.485 As the seat of , it eventually became known by that name in turn. The name Jiuquan —" spring(s)" — ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chernobyl Disaster
On 26 April 1986, the no. 4 reactor of the Chernobyl Nuclear Power Plant, located near Pripyat, Ukrainian Soviet Socialist Republic, Ukrainian SSR, Soviet Union (now Ukraine), exploded. With dozens of direct casualties, it is one of only two nuclear energy accidents rated at the maximum severity on the International Nuclear Event Scale, the other being the 2011 Fukushima nuclear accident. The response involved more than Chernobyl liquidators, 500,000 personnel and cost an estimated 18billion Soviet ruble, rubles (about $84.5billion USD in 2025). It remains the worst nuclear disaster and the List of disasters by cost, most expensive disaster in history, with an estimated cost of US$700 billion. The disaster occurred while running a test to simulate cooling the reactor during an accident in blackout conditions. The operators carried out the test despite an accidental drop in reactor power, and due to a design issue, attempting to shut down the reactor in those conditio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
N-Reactor
The N-Reactor was a water/graphite-neutron moderator, moderated nuclear reactor constructed during the Cold War and operated by the United States, U.S. government at the Hanford Site in Washington (state), Washington; it began production in 1963. It was a one-of-a-kind design in the U.S., being both a plutonium production reactor for nuclear weapons and, from 1966, producing steam to allow production of electricity to feed the civilian power grid via the Energy Northwest, Washington Public Power Supply System or WPPSS. The power rating of the N-Reactor was 4000 MWt, with a power output of 800 MWe at the power generating plant. In an improvement on the earlier Hanford reactors, N-Reactor was built with a confinement building (although not a containment building). In the event of an accidental release of steam, air and steam would vent through filters that confined any radioactive particles present. It was partially moderated with graphite, but had a negative void coefficient due t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
