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Pressurized Water Reactors

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by

Clara Williamson

on 12 October 2012

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Transcript of Pressurized Water Reactors

Pressurized Water Nuclear Reactors Tristan, Prakhya, Bryce, Shilpa, Arick and Clara How Pressurized Water Reactors Work Where Pressurized Water Reactor are Safety Concerns * A radioactive substance the reactor generates heat as it decays, heating water in the moderator.
-Neutrons fired at the substance cause it to reach critical mass and split apart in a chain reaction.
*The heat from this turns water in the steam generator into steam.
-The steam pushes a turbine connected to a generator. The outcome is mechanical energy.
*Control rods are in between the fuel rods.
-"Controls" the reaction by accepting neutrons.
*Water taken from a nearby source flows through.
-Steam condenses and is pumped back. *In this reactor, pressure is used to keep water from boiling in the moderator.
-The pressure vessel is used for control.
-Up= apply electrical heat
-down=apply cold water Nuclear reactors are famous for their disasters, but thousands of them do their jobs well day to day. Nuclear radiation can get into the environment and into our bodies by several means... A nuclear meltdown occurs when the coolant fails and the fuel rods liquify; from there they can sink into the earth/water supply A natural disaster such as a flood or earthquake can rupture the spent fuel pool or the reactor core
Built up gas in the air can catch fire/explode When nuclear radiation gets into the environment... Sudden exposure leads to radiation sickness, which ranges with severity from nausea to loss of brain cells to heart failure long-term exposure to radiation has been known to cause cancer Nuclear Reactors Pressurized Water Reactors http://www.terragalleria.com/images/black-white/france/fran41716-bw.jpeg Bibliography France Atomic Power Station with Four Pressurized Water Reactors. Provence, France. Digital image. Terragalleria.com. QT Tuong, 2009. Web. 8 Oct. 2012.
Nuclear Power Plant with Pressurized Water Reactor. Digital image. Eupropean Nuclear Society. N.p., n.d. Web. 7 Oct. 2012.
A Nuclear Reactor. Digital image. Independent Statistics & Analysis. U.S. Department of Energy, n.d. Web. 8 Oct. 2012.

..... http://belamifilm.com/wp-content/uploads/2012/03/usa-flag-map.png USA http://www.foronuclear.org/images/stories/vandellosII.jpg Spain PWRs are the most popular type of nuclear reactor in the world and are very widespread; it is almost impossible to track all of them but they are widely used in:
France
Spain
Belgium
And the large majority of United States nuclear power plants are PWRs *Water is allowed to boil in the steam generator.
-Water from the moderator and steam generator never mix.
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