* Two hurdle licensing. Up until the mid-1990 's developers of nuclear power plants had to obtain both a license to build a Nuclear Power then a subsequent license to operate the plant. This also delayed the start of plant operation which significantly increased the cost of the plant. The worst situation was that of the Shoreham Plant which was completed on Long Island in New York State at a cost of 5 Billion dollars but was never allowed to operate.
* Non-uniform designs. The US Nuclear Power Industry never achieved economies of volume because every reactor design was different. Each developer put in their own tweaks and much of the equipment was custom built for each plant. This compounded the difficulties of obtaining NRC licensing approval since the NRC had to evaluate each individual design. (nuclearinfo.net)
There have been many issues that have recently been identified which have created problems for the nuclear industry. Some of these problems include technicians falling asleep during their shift, fictitious safety reports, and drug use by guards has caused many issues in the past. A nuclear accident can be detrimental, not only to the environment but also to the humans who reside nearby, there must be no toleration for such events. The Nuclear Regulatory Commission (NRC) handles complaints from antinuclear activists. These lobbyists strive to make nuclear power plants too expensive to build, by demanding design changes which ultimately delay construction. Although there have been some positive outcomes from the activists, their central goal is to prevent nuclear power plants from existing. (Wikipedia)
The basic operation of a nuclear power plant normally consists of the reactor vessel, turbine, generator, and the condenser. Fission, which is the process that generates energy, takes place in the reactor vessel when a neutron hits a uranium-235 atom and the uranium atom absorbs the neutron. The uranium atom subsequently becomes unstable and splits. Heat is released by the nuclear fission reaction which releases more neutrons. The discharged neutrons set off fission reactions of more uranium atoms, which create a chain reaction. (See the fission process illustration below) Each uranium fission reaction releases a small amount of heat. Billions of fission reactions occurring every second in the reactor vessel produce enough heat to generate electricity. (PBS.org)
The heat created by nuclear fission converts water in the reactor vessel into high-pressured steam. A sequence of pipes transports the steam to the turbine. Once the steam is in the turbine, it flows through the turbine revolving the blades approximately 1,800 revolutions per minute. The rotating blades produce electricity. Another series of pipes guides the steam through a condenser which cools and condenses steam to water. The cycle is completed when the water is returned to the reactor vessel.
There are control rods inside the reactor vessel that are used to “control” the immense power exerted. Control rods are usually constructed from materials that have the ability to absorb neutrons, such as boron, silver, indium, cadmium and hafnium. The control rods cutback the fission rate when implanted in the reactor vessel, the power of the fission reaction is regulated by the quantity and depth of the control rods placed into the reactor vessel. To stop the fission chain reaction totally the control rods are set fully into position in the reactor vessel. (Nuclear Technology Exploring Possibilities) If there were no other energy source available in the world, the current supply of uranium would be able to sustain the world’s energy demands for well over 100 years. The prominent sources of uranium are in Canada, Australia, and Niger. As mentioned earlier, one of the biggest advantages of nuclear power is the fact that it produces a large amount of emission free energy. This is clearly a major advantage of nuclear energy, but with the pros come the cons. (Wikipedia) Most of the uranium is still contained in a nuclear fuel bundle after it has been removed from a reactor. Nuclear fuel is comprised of uranium-238, which does not break up easily. Nuclear reprocessing is the process in which uranium and other elements in the spent fuel are separated. The fission products produce waste from nuclear reactors, they are extremely radioactive and remain dangerous for thousands of years; they are no longer useful, and therefore, can be disposed of. Although fission products are the most dangerous form of nuclear waste, a reactor doesn 't generate a great deal of them; a 1 GW nuclear reactor only generates about 3,600 pounds of fission products per year. (nuclearinfo.net) Radioactive wastes transpire at all points of the nuclear fuel cycle - the process of creating electricity from nuclear resources. The fuel cycle encompasses the mining and milling of the uranium ore, its production into nuclear fuel, its use in the reactor, the management of the used fuel taken from the reactor after use and lastly the disposal of the wastes. (Nuclear Energy Institute) The fuel cycle is often considered as two parts - the "front end" which involves the processes from mining to the use of uranium in the reactor - and the "back end" which is comprised of the removal of used fuel from the reactor and its consequent treatment and disposal. The back end is where radioactive wastes are a major issue. The controlling of nuclear waste disposal is terrifying for many people. They are uneasy because of the range of problems that could be caused by human error. Past errors that have transpired in the nuclear industry frighten people into believing that nuclear energy should be avoided. Just the word “nuclear” instills fear among many people because of the ability to harness nuclear power into weapons of mass destruction. (Zehner) It’s true, nuclear waste is dangerous. In order to maintain environmental safety and the safety of the world’s population, dependable control of radioactive waste products, such as uranium and plutonium, are closely monitored. This is becoming more and more of concern as several nuclear power plants are entering the end of their lifecycle. (Mycle Schneider) In the United States nuclear rods are stored in water-filled pools at the plant site; this is causing apprehension of a possible leak or accident. (Zehner) The reality is that establishments accountable for the nuclear waste disposal are held responsible and operate under very restricted processes and regulations in regards to inspections and safety. Nuclear energy is clean and safe. However, nuclear accidents such as Chernobyl in the Soviet Union terrify people. On 26 April 1986, one of the reactors exploded releasing radiation ravaging a 20 mile radius, affecting the rest of the world as well. The cause of the Chernobyl accident was thought to be the result negligence of plant operators. (Mycle Schneider) Accidents happen, but generally the disposal of nuclear waste is operated dependably. If there was any good that came from the Chernobyl accident, it was lessons learned on handling nuclear meltdowns and it has assisted in avoiding future problems. The effects on the environment of coal by-products are far worse than those of nuclear energy. Nuclear waste can be contained and disposed of easily, more so than that of coal. Nuclear waste’s toxicity has a shelf life and an expiration date. Coal power by-products do not. (The International Conservation Society) Nuclear waste products are buried in sealed containers for storage. Currently, since there is not a central storage area, nuclear waste produced in the United States is usually stored near one of the 104 nuclear power plant locations across the country. Some other nuclear waste products are processed by transmutation which changes it to a much less toxic substance. Generally speaking, most countries, due to careful processes, are very conscientious in the disposal of nuclear waste. (Zehner)
The major concern of nuclear fission is a nuclear meltdown, which is described as severe heating and a lack of sufficient cooling at the reactor core. The reactor core can continue to produce heat even after the control rods have stopped the fission process. (Zehner) The effects of a nuclear accident are catastrophic, but the probability that an accident will occur are extremely low.
The design of a nuclear power plant has a specific plan in preventing accidents, diminishing their possible effects. The goal of this strategy is a series of back up plans; if one fails there is always another plan to offset the possibility of harm to the environment. There is the possibility that each of these plans could fail sequentially, but the chances of that happening are small. The design of a nuclear power plant allows for several “steps” that act as a radiation shield, first there is a concrete liner which houses the pressure vessel. Then there is a steel containment vessel, where the reactor and plant operators are who maintain the reactor. The steel containment vessel aids in preventing any leakage of radioactive materials from the plant. Protecting the steel containment vessel is an outer concrete building. This building is intended to be resilient enough to endure the possible damage that could occur during an earthquake or the impact of a Boeing 747. These structures are essential in preventing the expulsion of any harmful radiation if an accident should happen. Chernobyl lacked this back-up design which permitted radioactive material to escape. (Kang) Even with the little amount of nuclear energy currently utilized in the world, it has lessened the world’s reliance on coal and oil. As the demand for energy increases along with technological advances, we must look at resolutions to lower carbon dioxide emissions as well as viable solutions to preserve the environment. It’s just not realistic to install solar panels on every home or a windmill on every hill. The challenge for our future is the ability to provide enough fuel to power the people. Fossil fuels will not last forever, there has to be a better option. Nuclear fission produces a great amount of energy, little waste and it could be a very efficient resolution to the energy crisis the world is facing.
Works Cited
Andrew Zimmerman Jones, About.com Guide. About.com Physics. 2012. 28 May 2012 <http://physics.about.com/od/glossary/g/nuclearfusion.htm>.
David Haarmeyer, PowerAdvocate. "Nuclear New Build Cost Visibility and Predictability." Power Engineering 1 October 2008: 24.
Hibbs, Mark. "Nuclear Energy 2011: A Watershed Year." Feature. 2012.
Kang, Duyeon Kim and Jungmin. "Where Nuclear Safety and Security Meet." Report. 2012.
Lamb, Marshall Brian and Robert. How Stuff Works. 2012. 15 May 2012 <http://www.howstuffworks.com/nuclear-power.htm>.
Long, Tony. Wired. 27 June 2012. 28 June 2012 <http://www.wired.com/thisdayintech/2012/06/june-27-1954-worlds-first-nuclear-power-plant-opens/>.
Mycle Schneider, Antony Froggatt, and Steve Thomas. "2010-2011 World Nuclear Industry Status Report." Report. 2011.
Nuclear Energy Institute. Nuclear Waste Disposal. 2012. 28 May 2012 <http://www.nei.org/keyissues/nuclearwastedisposal/>.
Nuclear Power Plants, World-Wide. European Nuclear Society. 13 Jan 2011. 28 May 2012 <http://www.euronuclear.org/info/encyclopedia/n/nuclear-power-plant-world-wide.htm>.
Nuclear Technology Exploring Possibilities. 2010. 3 June 2012 <http://www.cna.ca/curriculum/cna_nuc_tech/nuclear_reactor-eng.asp?bc=How%20a%20Nuclear%20Reactor%20Works&pid=How%20a%20Nuclear%20Reactor%20Works>. nuclearinfo.net. 27 July 2010. 15 June 2012 <http://nuclearinfo.net/Nuclearpower>.
PBS.org. 1995-2012. 18 June 2012 <http://www.pbs.org/wgbh/pages/frontline/shows/reaction/interact/getclose.html>.
The International Conservation Society. 2012. 15 May 2012 <http://ics-org.tripod.com/fossil_fuels_dangers_and__conservation.html>.
Travis Madsen, Frontier Group, Maryland PIRG Foundation Johanna Neumann and CalPIRG Education Fund Emily Rusch. The High Cost of Nuclear Power. Report. Maryland: Maryland PIRG Foundation, 2009.
U.S. Department of Energy. 18 May 2012. 27 May 2012 <http://www.afdc.energy.gov/afdc/fuels/electricity_benefits.html>.
Westinghouse. Westinghousenuclear.com/ap1000_ec.html. 2012. 28 May 2012 <http://www.ap1000.westinghousenuclear.com/ap1000_ec.html>.
Wikipedia. Anti-nuclear movement. 2012. 28 May 2012 <http://en.wikipedia.org/wiki/Anti-nuclear_movement>.
—. Uranium-235. 2012. 28 May 2012 <http://en.wikipedia.org/wiki/Uranium-235>.
—. Wikipedia-Chernobyl Disaster. 2012. 28 May 2012 <http://en.wikipedia.org/wiki/Chernobyl_disaster>.
Zehner, Ozzie. "Nuclear Power 's Unsettled Future." The Futurist March-April 2012: 17-21.
Cited: Andrew Zimmerman Jones, About.com Guide. About.com Physics. 2012. 28 May 2012 <http://physics.about.com/od/glossary/g/nuclearfusion.htm>. Hibbs, Mark. "Nuclear Energy 2011: A Watershed Year." Feature. 2012. Kang, Duyeon Kim and Jungmin. "Where Nuclear Safety and Security Meet." Report. 2012. Lamb, Marshall Brian and Robert. How Stuff Works. 2012. 15 May 2012 <http://www.howstuffworks.com/nuclear-power.htm>. Mycle Schneider, Antony Froggatt, and Steve Thomas. "2010-2011 World Nuclear Industry Status Report." Report. 2011. Nuclear Energy Institute. Nuclear Waste Disposal. 2012. 28 May 2012 <http://www.nei.org/keyissues/nuclearwastedisposal/>. Nuclear Technology Exploring Possibilities. 2010. 3 June 2012 <http://www.cna.ca/curriculum/cna_nuc_tech/nuclear_reactor-eng.asp?bc=How%20a%20Nuclear%20Reactor%20Works&pid=How%20a%20Nuclear%20Reactor%20Works>. PBS.org. 1995-2012. 18 June 2012 <http://www.pbs.org/wgbh/pages/frontline/shows/reaction/interact/getclose.html>. The International Conservation Society. 2012. 15 May 2012 <http://ics-org.tripod.com/fossil_fuels_dangers_and__conservation.html>. Travis Madsen, Frontier Group, Maryland PIRG Foundation Johanna Neumann and CalPIRG Education Fund Emily Rusch. The High Cost of Nuclear Power. Report. Maryland: Maryland PIRG Foundation, 2009. Westinghouse. Westinghousenuclear.com/ap1000_ec.html. 2012. 28 May 2012 <http://www.ap1000.westinghousenuclear.com/ap1000_ec.html>. Wikipedia. Anti-nuclear movement. 2012. 28 May 2012 <http://en.wikipedia.org/wiki/Anti-nuclear_movement>. —. Uranium-235. 2012. 28 May 2012 <http://en.wikipedia.org/wiki/Uranium-235>. —. Wikipedia-Chernobyl Disaster. 2012. 28 May 2012 <http://en.wikipedia.org/wiki/Chernobyl_disaster>.
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