A boiling water reactor (BWR) is a type of light water nuclear reactor used for the generation of electrical power. It is the second most common type of electricity-generating nuclear reactor after the pressurized water reactor (PWR), which is also a type of light water nuclear reactor.
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.
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 the cities of Chattanooga and Knoxville. Watts Bar supplies enough electricity for about 1,200,000 households in the Tennessee Valley.
The Bellefonte Nuclear Generating Station (BLN) is an unfinished nuclear power plant in Hollywood, Alabama, United States.
A containment building is a reinforced steel, concrete or lead structure enclosing a nuclear reactor. It is designed, in any emergency, to contain the escape of radioactive steam or gas to a maximum pressure in the range of 275 to 550 kPa. The containment is the fourth and final barrier to radioactive release, the first being the fuel ceramic itself, the second being the metal fuel cladding tubes, the third being the reactor vessel and coolant system.
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.
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. 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 Economic Simplified Boiling Water Reactor (ESBWR) is a passively safe generation III+ reactor design derived from its predecessor, the Simplified Boiling Water Reactor (SBWR) and from the Advanced Boiling Water Reactor (ABWR). All are designs by GE Hitachi Nuclear Energy (GEH), and are based on previous Boiling Water Reactor designs.
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.
Stendal Nuclear Power Station is a nuclear power station which was never completed. It was located in East Germany, near the city of Arneburg, Stendal in Bezirk Magdeburg, today's Saxony-Anhalt.
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.
Boiling water reactor safety systems are nuclear safety systems constructed within boiling water reactors in order to prevent or mitigate environmental and health hazards in the event of accident or natural disaster.
The Fukushima Daiichi reactor, was 1 out of 4 reactors seriously affected during the Fukushima Daiichi nuclear disaster on 11 March 2011. Overall, the plant had 6 separate boiling water reactors originally designed by General Electric (GE), and maintained by the Tokyo Electric Power Company (TEPCO). At the time of the earthquake, Reactor 4 had been de-fueled while 5 and 6 were in cold shutdown for planned maintenance. Unit 1 was immediately shut down automatically after the earthquake, and emergency generators came online to control electronics and coolant systems. However, the tsunami following the earthquake quickly flooded the low-lying rooms in which the emergency generators were housed. The flooded generators failed, cutting power to the critical pumps that must continuously circulate coolant water through the reactor core. While the government tried pumping fresh water into the core, it was already too late due to overheat. In the hours and days that followed, Unit 1 experienced a full meltdown.
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.
