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Core Catcher
A core catcher is a device provided to catch the molten core material ( corium) of a nuclear reactor in case of a nuclear meltdown and prevent it from escaping the containment building. A core catcher is made from a special concrete ceramic to prevent material from trickling through; it also has a cooling mechanism to cool down the core material. The core catcher of the European Pressurized Reactor (EPR) has 170 m² expansion area and a mass of 500 t. Examples of reactor types with core catchers, besides the EPR, are: * SNR-300 (fast breeder)Areva Brochure: EPR - reference number:G-61-V1-07-GER * AES-91 / VVER-1000/428 * VVER-1200(PWR) * SWR1000 (BWR) * ESBWR ( BWR) * ABWR (BWR) * APWR ( PWR) * Atmea I (PWR) * ACPR-1000 (PWR) * EU-APR1400 (PWR) * IPWR-900 The AES-91, a project of Atomstroyexport based on the VVER-1000 design, was envisaged to be the first type of nuclear plant to have a core catcher directly underneath the reactor. Thus, in early 2011, the two ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schemata Core Catcher EPR
The word schema comes from the Greek word ('), which means ''shape'', or more generally, ''plan''. The plural is ('). In English, both ''schemas'' and ''schemata'' are used as plural forms. Schema may refer to: Science and technology * SCHEMA (bioinformatics), an algorithm used in protein engineering * Schema (genetic algorithms), a set of programs or bit strings that have some genotypic similarity * Schema.org, a web markup vocabulary * Schema (logic) ** Axiom schema, in formal logic * Image schema, a recurring pattern of spatial sensory experience * Database schema * XML schema Other * Body schema, a neural representation of one's own bodily posture * Galant Schemata, stock phrases in Galant music * Schema (Kant), in philosophy * Schema (psychology), a mental set or representation * Schema Records, a jazz record label in Milan, Italy *, a solemn vow of asceticism of a monk in Orthodox monasticism ** Great Schema, the highest degree of Orthodox monasticism * Schema (fly), ''S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
APWR
The Mitsubishi advanced pressurized water reactor (APWR) is a generation III nuclear reactor design developed by Mitsubishi Heavy Industries (MHI) based on pressurized water reactor technology. It features several design enhancements including a neutron reflector, improved efficiency and improved safety systems. It has safety features advanced over the last generation, including a combination of passive and active systems. None are currently under construction. History The standard APWR is going through the licensing process in Japan and two (of 1538 MWe) are being constructed at the Tsuruga plant. The next APWR+ will be of a 1700 MWe power and have full MOX core abilities. The US-APWR was developed by MHI to modify their APWR design to comply with US regulations. TXU selected the US-APWR for use at multiple sites, including the Comanche Peak Nuclear Generating Station. However, in 2013, Mitsubishi slowed U.S. certification work, and the application to build two units at Coman ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rooppur Nuclear Power Plant
The Rooppur Nuclear Power Plant ( bn, রূপপুর পারমাণবিক বিদ্যুৎকেন্দ্র) will be a 2.4 GWe nuclear power plant in Bangladesh. The nuclear power plant is being constructed at Rooppur of Ishwardi upazila in Pabna District, on the bank of the river Padma, west of Dhaka. It will be the country's first nuclear power plant, and the first of the two units is expected to go into operation in 2024. The VVER-1200/523 Nuclear reactor and critical infrastructures are being built by the Russian Rosatom State Atomic Energy Corporation. In the main construction period, the total number of employees will reach 12,500, including 2,500 specialists from Russia. It is expected to generate around 15% of the country's electricity when completed. History Planning The plan to establish a nuclear power plant in the then East Pakistan was made in 1961. In 1963, the Rooppur village of the Pabna district was selected for the proposed plant and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rosatom
Rosatom, ( rus, Росатом, p=rɐsˈatəm}) also known as Rosatom State Nuclear Energy Corporation, the State Atomic Energy Corporation Rosatom or Rosatom State Corporation, is a Russian state corporation headquartered in Moscow that specializes in nuclear energy, nuclear non-energy goods and high-tech products. Established in 2007, the organization comprises more than 350 enterprises, including scientific research organizations, the nuclear weapons complex, and the world's only nuclear icebreaker fleet. The state corporation is one of the largest in the world's nuclear energy industry. The organization ranks first as the largest electricity generating company in Russia, producing 215.746 TWh of electricity, 20.28% of the country's total electricity production. The corporation also ranks first in the overseas NPP construction, responsible for 76% of global nuclear technology exports: 35 nuclear power plant units, at different stages of development, in 12 countries, as of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tianwan Nuclear Power Plant
Tianwan Nuclear Power Plant is a nuclear power plant (NPP) in the city of Lianyungang in Jiangsu Province, China. It is located on the coast of the Yellow Sea approximately 30 kilometers east of Lianyungang proper. It is co-owned by Jiangsu Nuclear Power Corporation, a joint venture partially owned by the China National Nuclear Corporation (CNNC), and Atomstroyexport (ASE), the nuclear equipment exporter branch of the Russian nuclear corporation Rosatom. The NPP consists of four reactor units each rated at 1,000 MW capacity and constructed by ASE, two more units rated at 1,000 MW capacity constructed by CNNC and another two units rated at 1,200 MW capacity under construction under ASE. If all the units are completed, Tianwan will become the world's largest nuclear power plant with a total generating capacity of about 8,100 MWe, surpassing both the active Kori NPP (7,411 MWe) and the inactive Kashiwazaki-Kariwa NPP (7,965 MWe). History Units 1 and 2 Co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atomstroyexport
Atomstroyexport (russian: Атомстройэкспорт) is the Russian Federation's nuclear power equipment and service exporter. It is a fully owned subsidiary of Rosatom. The activities of Atomstroyexport are financially supported by the Russian government. The President of ASE Group of Companies is Alexander Lokshin. History The first research reactor was built and launched in China, in the "Institute of Nuclear Physics," in 1958. After two years in the city of Lanzhou to her it was erected a "Physical Institute". In it was an accelerator of the brand "U-150", specially built at the Izhorskiye Zavody for the Chinese (150 - is the diameter of the magnet poles in cm), the cyclotron, the deuteron has the energy of 18 MeV. The following year, the organization in the city of Rez (Czechoslovakia) is building "VVR-S", a research reactor (4 MW). Recent period The Russian nuclear vendor is building the first reactor power unit in Iranian Bushehr nuclear power plant located southwes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IPWR-900
The Indian Pressurized Water Reactor-900 (IPWR-900) is a class of pressurized water reactors being designed by Bhabha Atomic Research Centre (BARC) in partnership with Nuclear Power Corporation of India Limited to supplement the Indian three-stage nuclear power programme History BARC has developed a 83 MW compact light water reactor known as CLWR-B1 for the Indian Navy's Arihant-class submarine program which includes a prototype reactor operating at Kalpakkam since 2002 and was made operational in the INS Arihant in 2013. The experience gained in the naval reactor program is being used to develop a commercial electricity generation reactor of 900 MWe capacity. To support the industrial capacity to fabricate the large forgings for a reactor pressure vessel, a heavy forge unit has been set up as a joint venture by the Nuclear Power Corporation of India Limited and Indian engineering conglomerate Larsen & Toubro's subsidiary L&T Special Steels and Heavy Forgings Limited in Hazir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CPR-1000
The CPR-1000, or CPR1000 (Chinese PWR) is a Generation II+ pressurized water reactor, based on the French 900 MWe three cooling loop design (M310) imported in the 1980s, improved to have a slightly increased net power output of 1,000 MWe (1080 MWe gross) and a 60-year design life. The CPR-1000 is built and operated by the China General Nuclear Power Group (CGNPG), formerly known as China Guangdong Nuclear Power. Progressively more Chinese manufactured components were used in the units; the second unit built had 70% of its equipment manufactured in China, with a 90% Chinese content target for later builds. Construction On 15 July 2010, China's first CPR-1000 nuclear power plant, Ling Ao-3, was connected to the grid, having started criticality testing on 11 June 2010. It started commercial operations on 27 September 2010, with Ling Ao-4 starting commercial operation on 7 August 2011. 18 CPR-1000 reactors have been built as of December 2019. Besides Ling Ao unit 3 & 4, the CPR- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atmea
Atmea was a joint venture between Mitsubishi Heavy Industries (MHI) and EDF Group set up in 2006 to develop, market, license and sell the ATMEA1 reactor, a new generation III+, medium-power pressurized water reactor (PWR). The company was headquartered in Paris. The joint venture was abandoned in 2019. History A memorandum of understanding between AREVA and MHI effectively creating the entity was signed 19 October 2006 and the name of the joint venture was announced on 3 September 2007. The European Commission cleared the joint venture in October 2007 on the grounds that the activities of Areva and MHI were geographically complementary and Atmea was unlikely to strengthen the competitiveness of each parent company. The completion of the French nuclear industry reorganisation under EDF leadership in 2018 also led to a renewed partnership within ATMEA. ATMEA was initially formed as a joint venture between AREVA NP and MHI to develop the next-generation AT-MEA1 reactor. Under the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pressurized Water Reactor
A pressurized water reactor (PWR) is a type of light-water reactor, light-water nuclear reactor. PWRs constitute the large majority of the world's nuclear power plants (with notable exceptions being the UK, Japan and Canada). In a PWR, the primary nuclear reactor coolant, coolant (water) is pumped under high pressure to the reactor core where it is heated by the energy released by the Nuclear fission, fission of atoms. The heated, high pressure water then flows to a Water-tube boiler, steam generator, where it transfers its thermal energy to lower pressure water of a secondary system where steam is generated. The steam then drives turbines, which spin an electric generator. In contrast to a boiling water reactor (BWR), pressure in the primary coolant loop prevents the water from boiling within the reactor. All light-water reactors use ordinary water as both coolant and neutron moderator. Most use anywhere from two to four vertically mounted steam generators; VVER reactors use horizo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ABWR
The advanced boiling water reactor (ABWR) is a Generation III boiling water reactor. The ABWR is currently offered by GE Hitachi Nuclear Energy (GEH) and Toshiba. The ABWR generates electrical power by using steam to power a turbine connected to a generator; the steam is boiled from water using heat generated by fission reactions within nuclear fuel. Kashiwazaki-Kariwa unit 6 is considered the first Generation III reactor in the world. Boiling water reactors (BWRs) are the second most common form of light water reactor with a direct cycle design that uses fewer large steam supply components than the pressurized water reactor (PWR), which employs an indirect cycle. The ABWR is the present state of the art in boiling water reactors, and is the first Generation III reactor design to be fully built, with several reactors complete and operating. The first reactors were built on time and under budget in Japan, with others under construction there and in Taiwan. ABWRs were on order ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corium (nuclear Reactor)
The Three Mile Island reactor 2 after the partial meltdown. Corium, also called fuel-containing material (FCM) or lava-like fuel-containing material (LFCM), is a material that is created in a nuclear reactor core during a nuclear meltdown accident. Resembling lava in consistency, it consists of a mixture of nuclear fuel, fission products, control rods, structural materials from the affected parts of the reactor, products of their chemical reaction with air, water and steam, and, in the event that the reactor vessel is breached, molten concrete from the floor of the reactor room. Composition and formation The heat causing the melting of a reactor may originate from the nuclear chain reaction, but more commonly decay heat of the fission products contained in the fuel rods is the primary heat source. The heat production from radioactive decay drops quickly, as the short half-life isotopes provide most of the heat and radioactive decay, with the curve of decay heat being a s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
