nuclear reactor


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nuclear reactor

n.
1. A device in which nuclear fission initiates a controlled chain reaction, producing heat energy typically used for power generation, and neutrons and fission products often used for military, experimental, and medical purposes. Also called atomic reactor.
2. A device, such as a tokamak, in which nuclear fusion takes place in a controlled chain reaction.

nuclear reactor

n
(Nuclear Physics) a device in which a nuclear reaction is maintained and controlled for the production of nuclear energy. Sometimes shortened to: reactor Former name: atomic pile See also fission reactor, fusion reactor
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nuclear reactor

A device in which a nuclear chain reaction is started and controlled, producing heat which is usually used to generate electricity.
Did You Know? The cylindrical core of a nuclear reactor consists of fuel rods containing pellets of fissionable material, usually uranium 235 or plutonium 239. These are unstable isotopes that readily split apart and release free neutrons that strike other isotopes, causing them to split. The fuel rods contain enough fissionable material that is close enough together to start what is called a chain reaction. If left unaltered, the chain reaction would cause the fuel rods to overheat and melt. To prevent this, and to regulate the reaction, the fuel rods are interspersed with control rods made of a material (usually boron or cadmium) that absorbs some of the neutrons given off by the fuel. Inserting the control rods deeper into the reactor core slows down the reaction. If the control rods are fully inserted, the reaction will stop. The chain reaction releases enormous amounts of heat which is transferred, through a closed loop of radioactive water, to a separate, nonradioactive water system. The heat turns the nonradioactive water into pressurized steam. The steam then drives turbines that turn generators, producing electricity. Nuclear power is by far the most efficient means of generating electricity in the world today. It remains controversial, however, because much of the equipment needed to generate it, including the used-up fuel rods and the water inside the container vessels, remains radioactive for thousands of years. So far there is little agreement about how to store this material safely.

nuclear reactor

A facility in which fissile material is used in a self-supporting chain reaction (nuclear fission) to produce heat and/or radiation for both practical application and research and development.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.nuclear reactor - (physics) any of several kinds of apparatus that maintain and control a nuclear reaction for the production of energy or artificial elementsnuclear reactor - (physics) any of several kinds of apparatus that maintain and control a nuclear reaction for the production of energy or artificial elements
apparatus, setup - equipment designed to serve a specific function
atomic pile, atomic reactor, chain reactor, pile - a nuclear reactor that uses controlled nuclear fission to generate energy
breeder reactor - a nuclear reactor that produces more fissile material than it burns
control rod - a steel or aluminum rod that can be moved up or down to control the rate of the nuclear reaction
core - the chamber of a nuclear reactor containing the fissile material where the reaction takes place
fast reactor - nuclear reactor in which nuclear fissions are caused by fast neutrons because little or no moderator is used
gas-cooled reactor - a nuclear reactor using gas as a coolant
liquid metal reactor - a nuclear reactor using liquid metal as a coolant
thermal reactor - a nuclear reactor in which nuclear fissions are caused by neutrons that are slowed down by a moderator
fusion reactor, thermonuclear reactor - a nuclear reactor that uses controlled nuclear fusion to generate energy
water-cooled reactor - nuclear reactor using water as a coolant
natural philosophy, physics - the science of matter and energy and their interactions; "his favorite subject was physics"
moderator - any substance used to slow down neutrons in nuclear reactors
Translations
مُفاعِل نَوَوي
jaderný reaktor
atomreaktor
kjarnakljúfur
jadrový reaktor
atom reaktörü

nuclear reactor

nreattore m nucleare

nucleus

(ˈnjuːkliəs) plural ˈnuclei (-kliai) noun
1. the central part of an atom.
2. the part of a plant or animal cell that controls its development.
nuclear (ˈnjuːkliə) adjective
1. using atomic energy. a nuclear power station; nuclear weapons.
2. of a nucleus.
ˈnuclear device noun
a device or a weapon that contains a nuclear bomb.
nuclear disarmament
the act of ceasing to store atomic weapons.
nuclear energy
atomic energy.
nuclear reactor
an apparatus for producing nuclear energy.
References in periodicals archive ?
The first of four nuclear reactors being built by the United Arab Emirates will come online in 2017 and the rest will be fully operational by 2020, CEO of the Emirates Nuclear Energy Corp (ENEC), Mohammed Al Hammadi, said Monday.
The achievement of criticality by the nuclear reactor onboard INS Arihant marked the conclusion of harbour trials.
Also in May, Jordan will select the strategic partner of the project, Toukan said, adding that the final agreement to build the nuclear reactor will be signed in the second half of 2013.
The sixth nuclear reactor was constructed on 24 December 2002.
Yesterday the Office for Nuclear Regulation said: "Generic designs for two nuclear reactors proposed for construction in the UK have been granted interim design acceptance by the independent nuclear safety, security and environment regulators.
She told NINA today that "building a nuclear reactor on the Iraqi border is a violation of the laws of the neighboring countries, set by the UN.
Unfortunately for humanity, politicians preferred uranium nuclear reactors simply because their main purpose was to provide weapons-grade uranium and plutonium.
The Associated Press report suggests that if honoured, Syria would cooperate with the International Atomic Energy Agency (IAEA) over allegations that a target bombed in 2007 was a nuclear reactor, capable of producing plutonium.
destroyed by Israel was a nuclear reactor under construction," he told a full news conference in response to a question from The Associated Press, repeating to the AP in taped comments afterward: "It was a reactor under construction.
Vice-Chancellor of London-based World Nuclear University, Hawley said in an interview that "currently there are in the world under construction 53 nuclear reactors.
The likely cost of electricity for a new generation of nuclear reactors would be 12 to 20 cents per kilowatt hour, considerably more expensive than the average cost of increased use of energy efficiency and renewable energies at six cents per kWh, according to a study by Mark Cooper, a senior fellow for economic analysis at the Institute of Energy and the Environment at Vermont Law School, South Royalton.

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