A nuclear meltdown is a severe nuclear reactor accident that results in core damage from overheating. The term nuclear meltdown is not officially defined by the International Atomic Energy Agency or by the United States Nuclear Regulatory Commission. It has been defined to mean the accidental melting of the core of a nuclear reactor, however, and is in common usage a reference to the core's either complete or partial collapse.
A nuclear power plant (NPP), also known as a nuclear power station (NPS), nuclear generating station (NGS) or atomic power station (APS) is a thermal power station in which the heat source is a nuclear reactor. As is typical of thermal power stations, heat is used to generate steam that drives a steam turbine connected to a generator that produces electricity. As of September 2023, the International Atomic Energy Agency reported that there were 410 nuclear power reactors in operation in 32 countries around the world, and 57 nuclear power reactors under construction.
The Browns Ferry Nuclear Power Plant is located on the Tennessee River near Decatur and Athens, Alabama, on the north side of Wheeler Lake. The site has three General Electric boiling water reactor (BWR) nuclear generating units and is owned entirely by the Tennessee Valley Authority (TVA). With a generating capacity of nearly 3.8 gigawatts, it is the third most powerful nuclear power plant in the United States, behind the Palo Verde Nuclear Power Plant in Arizona and the Vogtle Nuclear Power Plant in Georgia, and the most powerful generating station operated by TVA.
The Sequoyah Nuclear Plant is a nuclear power plant located on 525 acres (212 ha) located 7 miles (11 km) east of Soddy-Daisy, Tennessee, and 20 miles (32 km) north of Chattanooga, abutting Chickamauga Lake on the Tennessee River. The facility is owned and operated by the Tennessee Valley Authority (TVA).
The Watts Bar Nuclear Plant is a Tennessee Valley Authority (TVA) nuclear reactor pair used for electric power generation. It is located on a 1,770-acre (7.2 km²) site in Rhea County, Tennessee, near Spring City, between Chattanooga and Knoxville. Watts Bar supplies enough electricity for about 1.2 million households in the Tennessee Valley.
The Alvin W. Vogtle Electric Generating Plant, also known as Plant Vogtle, is a four-unit nuclear power plant located in Burke County, near Waynesboro, Georgia, in the southeastern United States. With a power capacity of 4,536 megawatts, it is the largest nuclear power plant, the largest source of low-carbon electricity, and largest power station overall in the United States. It is also the only nuclear plant in the country with four units. It is named after a former Alabama Power and Southern Company board chairman, Alvin Vogtle.
The Bellefonte Nuclear Generating Station (BLN) is an unfinished nuclear power plant in Hollywood, Alabama, United States.
Columbia Generating Station is a nuclear commercial energy facility located on the Hanford Site, 10 miles (16 km) north of Richland, Washington. It is owned and operated by Energy Northwest, a Washington state, not-for-profit joint operating agency. Licensed by the Nuclear Regulatory Commission in 1983, Columbia first produced electricity in May 1984, and entered commercial operation in December 1984.
The Enrico Fermi Nuclear Generating Station is a nuclear power plant on the shore of Lake Erie near Monroe, in Frenchtown Charter Township, Michigan on approximately 1,000 acres (400 ha). All units of the plant are operated by the DTE Energy Electric Company and owned by parent company DTE Energy. It is approximately halfway between Detroit, Michigan, and Toledo, Ohio. It is also visible from parts of Amherstburg and Colchester, Ontario as well as on the shore of Lake Erie in Ottawa County, Ohio. Two units have been constructed on this site. The first unit's construction started on August 4, 1956 and reached initial criticality on August 23, 1963, and the second unit received its construction permit on September 26, 1972. It reached criticality on June 21, 1985 and was declared commercial on November 18, 1988. The plant is connected to two single-circuit 345 kV Transmission Lines and three 120 kV lines. They are operated and maintained by ITC Transmission.
The water-water energetic reactor (WWER), or VVER is a series of pressurized water reactor designs originally developed in the Soviet Union, and now Russia, by OKB Gidropress. The idea of such a reactor was proposed at the Kurchatov Institute by Savely Moiseevich Feinberg. VVER were originally developed before the 1970s, and have been continually updated. They were one of initial the reactors developed by the USSR, the other being the infamous RBMK. As a result, the name VVER is associated with a wide variety of reactor designs spanning from generation I reactors to modern generation III+ reactor designs. Power output ranges from 70 to 1300 MWe, with designs of up to 1700 MWe in development. The first prototype VVER-210 was built at the Novovoronezh Nuclear Power Plant.
The Cherokee Nuclear Power Plant is an incomplete energy project 10 miles (16 km) outside Gaffney, South Carolina, United States. In the early 1970s, Duke Power started construction on a three-reactor nuclear power plant at the site. However, the project stalled due to economic problems by the early 1980s, leading to the project's eventual abandonment. In 1987, the power plant was the site of an underwater film studio built by Hollywood director James Cameron, for the film The Abyss.
Marble Hill Nuclear Power Station was an unfinished nuclear power plant in Saluda Township, Jefferson County, near Hanover, Indiana, USA. In 1984, the Public Service Company of Indiana announced it was abandoning the half-finished nuclear power plant, on which $2.5 billion had already been spent.
The three primary objectives of nuclear reactor safety systems as defined by the U.S. Nuclear Regulatory Commission are to shut down the reactor, maintain it in a shutdown condition and prevent the release of radioactive material.
Washington Nuclear Project Nos. 1 and 4, abbreviated as WNP-1 and WNP-4 were two of the five nuclear power plants on which construction was started by the Washington Public Power Supply System (WPPSS) in order to meet projected electricity demand in the Pacific Northwest. WNP-1, WNP-2 and WNP-3 were part of the original 1968 plan, with WNP-4 and WNP-5 added in the early 1970s.
The Yellow Creek Nuclear Plant is a canceled nuclear power plant project near Iuka, Mississippi. It was originally planned to have two 1,350-MW (output) reactors operated by the Tennessee Valley Authority (TVA). The steam turbine-generator sets were provided by General Electric.
The B&W mPower was a proposed small modular reactor designed by Babcock & Wilcox, and to be built by Generation mPower LLC, a joint venture of Babcock & Wilcox and Bechtel. It was a Generation III+ integral pressurized water reactor concept.
The Energy Multiplier Module is a nuclear fission power reactor under development by General Atomics. It is a fast-neutron version of the Gas Turbine Modular Helium Reactor (GT-MHR) and is capable of converting spent nuclear fuel into electricity and industrial process heat.
Phipps Bend Nuclear Plant was a planned nuclear power generation facility that was to be constructed and operated by the Tennessee Valley Authority (TVA) in unincorporated Hawkins County, Tennessee. Proposed to house two reactor units, the power plant was estimated to cost $1.6 billion when it was first planned in late 1977, provide a generating capacity of 2,600,000 kilowatts. Following negative public reactions towards nuclear energy following the Three Mile Island accident and a decreasing demand for power due to regional economic decline, the TVA's board of directors voted to defer further construction of the power plant. By 1981, the plant was 40% complete and an estimated $1.5 billion in planning, engineering, and construction costs had accumulated. Construction never resumed, and the project was canceled overall in 1982 due to lower load growth than forecast. By the project's cancellation, the TVA had amassed over $2.6 billion in spending for the incomplete nuclear facility. After being auctioned off by the TVA in 1987, the land acquired for the plant would be under the ownership of Hawkins County's industrial development board, who converted most of the site into an industrial park. A 1 MW solar farm was built at the site in 2017.
Watts Bar Steam Plant was a 267-megawatt (MW), coal power plant operated by the Tennessee Valley Authority (TVA) located in Rhea County, Tennessee near the present site of Watts Bar Nuclear Plant and Watts Bar Dam. The plant was the first coal-fired power plant constructed by TVA.
