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Topic: Nuclear meltdown


  
  Nuclear meltdown - Wikipedia, the free encyclopedia
A nuclear meltdown occurs when the core of a nuclear reactor ceases to be properly controlled and cooled due to failure of control or safety systems, and fuel assemblies (containing the uranium or plutonium reactor fuel and highly radioactive fission products) inside the reactor begin to overheat and melt.
All nuclear meltdowns are characterized by severe damage to the nuclear reactor in which it occurs.
In practice, however, a nuclear meltdown is often part of a larger chain of disasters (although there have been so few meltdowns in the history of nuclear power that there is not a large pool of statistical information from which to draw a credible conclusion as to what "often" happens in such circumstances).
en.wikipedia.org /wiki/Nuclear_meltdown   (1901 words)

  
 Nuclear meltdown
Fast breeder reactors are more susceptible to meltdown than other reactor types, due to the larger quantity of fissile material and the higher neutron flux inside the reactor core, which makes it relatively more difficult to control the reaction.
A nuclear meltdown is also colloquially known as the China syndrome, from the humorously exaggerated notion that molten reactor material would burrow from the United States through the center of the earth and emerge in China, as popularized by the 1979 film, The China Syndrome.
The only known large scale nuclear meltdown at a civilian nuclear power plant was at Chernobyl, Ukraine, in 1986, although there have been several partial core meltdowns, including accidents at:
www.ebroadcast.com.au /lookup/encyclopedia/me/Meltdown.html   (279 words)

  
 AlterNet: Nuclear Meltdown?
Other states have been cowed by the industry's assurances that nuclear power is safe, despite recent near misses, like that at Davis-Besse in Ohio, and that the federal government has everything under control at the Nuclear Regulatory Commission.
The marine life in the Pacific Ocean surrounding Diablo Canyon near San Luis Obispo, as well as the marine life adjacent to another nuclear plant on the Pacific near San Onofre, has been denuded as the plants suck up billions of gallons of seawater a day to be returned to the ocean at higher temperatures.
Recent federal estimates of nuclear fuel-related accidents in the Los Angeles area estimated that within hours a nuclear plume would disperse radiation almost 30 miles and assumes nearly 400 latent fatal cancers in one year.
www.alternet.org /story.html?StoryID=17938   (792 words)

  
 NRC: Fact Sheet on the Accident at Three Mile Island
Because adequate cooling was not available, the nuclear fuel overheated to the point at which the zirconium cladding (the long metal tubes which hold the nuclear fuel pellets) ruptured and the fuel pellets began to melt.
In a worst-case accident, the melting of nuclear fuel would lead to a breach of the walls of the containment building and release massive quantities of radiation to the environment.
Nuclear Reactor - A device in which nuclear fission may be sustained and controlled in a self-supporting nuclear reaction.
www.nrc.gov /reading-rm/doc-collections/fact-sheets/3mile-isle.html   (2970 words)

  
 Nuclear meltdown (via CobWeb/3.1 planetlab1.cs.columbia.edu)   (Site not responding. Last check: 2007-10-09)
In practice, however, a nuclear meltdown is usually part of a larger chain of disasters.
Although pressurized water reactors are susceptible to nuclear meltdown in the absence of active safety measures, this is not a universal feature of civilian nuclear reactors.
In reality, a melting reactor is estimated to be able to sink at most 15 meters; once radioactive slag reached the water table beneath the reactor building, the enormous steam release could throw the material into the air, for it to land as fallout across a wide area.
nuclear-meltdown.iqnaut.net.cob-web.org:8888   (1001 words)

  
 PREDA ARTICLE - IF THE NUCLEAR MELTDOWN HAPPENS, WHAT THEN?
There are no negotiations in sight on sea based nuclear weapons and it is these that poise an even greater danger to the ecology of the oceans and especially to the Philippines.
The possession of nuclear weapons which can destroy entire cities is immoral according to the US Catholic Bishops because even contemplating their use means the killing of thousands of innocent people and accepting the inevitable death of millions of people in a counter retaliatory attack.
Besides the huge number of nuclear weapons there are almost 550 nuclear reactors churning away in the bowels of the ships of these navies and despite the claims that they are the safest power sources afloat they are accidents waiting to happen with devastating results.
www.preda.org /archives/1989-90-91-92/r9002151.htm   (1090 words)

  
 Nuclear Disasters
Two of the most famous nuclear accidents occurred at the Three Mile Island reactor 2 in the United States and the Chernobyl reactor 4 in the former Soviet Union.
In a complete reactor meltdown, the extremely hot (about 2700º Celsius) molten uranium fuel rods would melt through the bottom of the reactor and actually sink about 50 feet into the earth beneath the power plant.
A partial nuclear meltdown is when the uranium fuel rods start to liquefy, but they do not fall through the reactor floor and breach the containment systems.
library.thinkquest.org /17940/texts/nuclear_disasters/nuclear_disasters.html   (2718 words)

  
 Safety and Security | Greenpeace USA
If a meltdown were to occur the accident could kill and injure tens of thousands of people, leaving large regions uninhabitable.
The nuclear industry and the Nuclear Regulatory Commission (NRC) have always maintained that the probability of an accident was low.
At the dawn of the nuclear era, the head of the Atomic Energy Commission predicted that nuclear power would supply "electrical energy too cheap to meter." However, the meltdown at Three Mile Island and the explosion at Chernobyl irreparably altered the image of nuclear power.
www.greenpeace.org /usa/campaigns/nuclear/safety-and-security?page=2   (396 words)

  
 Howstuffworks "How Nuclear Power Works" (via CobWeb/3.1 planetlab1.cs.columbia.edu)   (Site not responding. Last check: 2007-10-09)
In France, for instance, about 75 percent of the electricity is generated from nuclear power, according to the International Atomic Energy Agency.
Have you ever wondered how a nuclear power plant works or how safe nuclear power is? In this article, we will examine how a nuclear reactor and a power plant work.
So many, in fact, that a pound of highly enriched uranium as used to power a nuclear submarine or nuclear aircraft carrier is equal to something on the order of a million gallons of gasoline.
www.howstuffworks.com.cob-web.org:8888 /nuclear-power.htm   (1212 words)

  
 CHERNOBYL: TIME Coverage
Sakharov, 65, a nuclear physicist often described as the ''father of the Soviet hydrogen bomb'' and a courageous defender of human rights in his homeland, spent nearly seven years under virtual house arrest with his wife Elena Bonner in the closed city of Gorky.
Four years have passed since the meltdown at the Chernobyl nuclear plant, but the grim legacy of the Soviet catastrophe is still unfolding.
Six years later, 19 similar graphite-moderated nuclear time bombs are still ticking away, alarming relics of a badly designed, haplessly run nuclear-power program that none of the independent republics of the former Soviet Union can afford to shut down.
www.time.com /time/daily/chernobyl/chernobyl.index.html   (1641 words)

  
 anti-nuclear : Melbourne Indymedia   (Site not responding. Last check: 2007-10-09)
The company that runs the Swedish nuclear power station that suffered a near nuclear meltdown on July 25, has been trying to malign the whistleblower, Lars-Olov Höglund, including questioning his capacity to judge and his safety expertise.
Some think Howard is playing wedge politics on the issue by putting forward nuclear power as a possibility which he does not really care about and knows is uneconomic and is prepared to lose, to distract opposition to expansion of uranium mining, nuclear fuel reprocessing and nuclear waste storage.
A coalition of peace groups in Brisbane say that the nuclear powered and armed USS Ronald Reagan is not welcome in the Port of Brisbane and are taking to their kayaks and row boats in a peace flotilla to make their point.
www.melbourne.indymedia.org /features/anti-nuke   (1707 words)

  
 Nuclear Reactor Meltdown - What it is and is not
Such conditions are considered to be outside the design basis for nuclear plants and are referred to as Class 9 accidents.
If a meltdown does occur, a release of radioactive materials to the environment can occur ONLY IF there is also a major failure of the containment structure.
The Chernobyl event occurred during a test and was due to a combination of design deficiencies and operator error.
www.nucleartourist.com /events/meltdown.htm   (732 words)

  
 nuclear meltdown | Sprol
Odds are nuclear fission is not a major source of the energy that you consume in an average day, yet that doesn’t make the discussion of its possible impact on your quality of life any less important.
Nuclear submarines are essentially water cooled nuclear reactors that use highly enriched plutonium fuel rods to provide electric power for the operation of the vessel.
Nuclear powered boats revolutionized the ability for nations to project force, since for the first time since the sailing days the Navy didn't need to worry about an extensive network of tankers and coaling stations.
www.sprol.com /?s=nuclear+meltdown   (7136 words)

  
 Nuclear Meltdown | Greenpeace International
As the highly dangerous and unnecessary shipment of reject plutonium from Japan to the UK enters European waters, nearing its eventual destination of Sellafield, the British and Japanese nuclear industries must be wishing they had never signed the contract for it to proceed.
If the huge subsidies gratefully received by the nuclear and fossil fuel industries had been spent with the health and security of the planet and its people in mind, the story would be so different today.
To add to the nuclear industry’s woes, in the next week or so the reject plutonium shipment will sail into the Irish Sea into possibly the largest peaceful protest that it has encountered.
www.greenpeace.org /international/news/nuclear-meltdown   (607 words)

  
 Nuclear Meltdown   (Site not responding. Last check: 2007-10-09)
Currently, only four of India's nuclear facilities are subject to foreign safeguards - compare that to 14 reactors under scrutiny with this new agreement - and these present safeguards are positively less muscular than the new inspections to which India will be submitting.
With Bush signing the nuclear deal, and the IAEA director-general hailing it, Tehran has a whole new series of opportunities to exploit.
India and other de facto nuclear weapons states should not benefit from nuclear cooperation if they fail to observe the standards established for responsible nuclear supplier states to limit the further spread of nuclear weapons.
www.newsline.com.pk /NewsMar2006/newsbeat2mar2006.htm   (1155 words)

  
 Santa Susana nuclear meltdown may have caused cancers: Report
LOS ANGELES - The nuclear reactor meltdown at the Santa Susana Field Laboratory in 1959 may have resulted in hundreds of cancer cases in the community due to the release of harmful radioactive emissions, according to a report by an independent advisory panel released on Thursday.
The report estimated that the reactor meltdown might have caused at least 260 cases of cancer in a 60-mile radius in eastern Ventura County, where the reactor was located.
For more than two decades, people were asking about the fallout of the reactor meltdown and the study fills a gap in the details, he said.
www.earthtimes.org /articles/show/9225.html   (461 words)

  
 CNS - Book: Preventing Nuclear Meltdown
The decline in central financing for Russia's nuclear complex and the known interest of terrorist groups in acquiring fissile material and technologies, has made the state of Russia's farflung nuclear enterprises a pressing international issue.
In this important volume, a group of leading US and Russian policy experts—drawing on extensive interviews with officials, facility personnel, and analysts in Russia's regions—explores the intersecting problems of Russian nuclear insecurity and decentralization, including the growing influence of regional, political and economic forces.
The work presents insights into both nuclear safety issues and post-Soviet intra-agency governance, as well as detailed case studies of critical nuclear regions: the Far East, the Urals, Siberia, and the Volga area.
cns.miis.edu /pubs/books/meltdown.htm   (360 words)

  
 Nuclear meltdown: Clintonoids still dawdling on atomic espionage [Free Republic]
And the fact is that the security problems at the nation's nuclear labs have not been fixed, the smug assurances of Energy Secretary Bill Richardson notwithstanding.
The only way to ensure that vigorous steps are being taken to root out those who may have leaked nuclear secrets and to ensure the future security of the nation's defense labs is to create a new, free-standing agency whose sole mandate would be to maintain the safety, reliability and security of our nuclear deterrent.
Richardson and his boss, Bill Clinton, and his predecessor at Energy were not as attentive to the security of the nation's nuclear secrets as they now are to the well-being of the taxpayers' wallets.
www.freerepublic.com /forum/a3770c97e7e32.htm   (1051 words)

  
 MPIRG > Energy > Nuclear > Minnesota Meltdown?
Unit 2 at the Prairie Island nuclear power plant had to be shutdown to work on backup power generators that are used to protect the nuclear reactor from meltdown during power outages.
Even more threatening, at the nuclear plant in Monticello, a tip from a similar nuclear plant in Iowa led to the discovery that a portion of a venting system designed to protect the public from the release of radioactive steam has not been fully functional for the entire 30 years that the plant has existed!
The Nuclear Regulatory Commission then determined that company officials lacked respect for the serious nature of this event and failed to report the incident in a timely manner.
www.mpirg.org /energy/nuclear/safetyconcerns/index.html   (754 words)

  
 Amazon.com: Meltdown: Music: Ash   (Site not responding. Last check: 2007-10-09)
Meltdown was supposed to be released here in the US months and months ago.
Meltdown isn't anywhere near as pop-friendly as that record.
But the centerpiece of Meltdown remains "Orpheus", a song that masterfully blends Ash's pop knowhow with their thunderous guitar attack.
www.amazon.com /Meltdown-Ash/dp/B0007LXP1I   (1707 words)

  
 RedOrbit - Health - Nuclear Meltdown May Have Caused Cancers
LOS ANGELES - A 1959 nuclear reactor meltdown at the Santa Susana Field Laboratory may have caused hundreds of cases of cancer in the community, and chemicals threaten to contaminate ground and water, according to a report released Thursday.
The report by an independent advisory panel estimated it was likely that radiation released during the meltdown caused about 260 cases of cancer within a 60-square-mile area around the reactor.
The panel of experts from around the country was formed by legislators in the early 1990s who responded to residents' calls for independent health studies of the site.
www.redorbit.com /news/health/683055/nuclear_meltdown_may_have_caused_cancers/index.html?source=r_health   (487 words)

  
 IRAN: NUCLEAR MELTDOWN - [Sunday Herald]
There was going to be a moratorium on these activities, it would be given time to work through these issues to find a solution,” she told a news conference.
After almost three years of trying to keep Iran onside as it pursued its nuclear ambitions – Britain and the European Union (EU) were the prime movers – diplomacy has been put to one side as the US and Europe combine to take a much tougher stance.
This would provide it with a nuclear capacity which would destabilise the regional balance of power at a time when it is already rickety following the overthrow of Saddam Hussein in Iraq and the ensuing insurgency.
www.sundayherald.com /53543   (1612 words)

  
 "Nuclear Option" is turning into a "Nuclear Meltdown" for the Republican Party | Democrats.com
Rick Santorum (R-Pa.), a leading advocate of the “nuclear option” to end the Democrats’ filibuster of judicial nominees, is privately arguing for a delay in the face of adverse internal party polls.
Details of the polling numbers remain under wraps, but Santorum and other Senate sources concede that, while a majority of Americans oppose the filibuster, the figures show that most also accept the Democratic message that Republicans are trying to destroy the tradition of debate in the Senate.
The Republicans are keeping the “nuclear” poll numbers secret, whereas they have often in the past been keen to release internal survey results that favor the party.
democrats.com /node/4348   (1443 words)

  
 Chernobyl disaster - Wikipedia, the free encyclopedia
The Chernobyl disaster was an accident at the Chernobyl Nuclear Power Plant on April 26, 1986 at 01:23 a.m., consisting of an explosion at the plant and subsequent radioactive contamination of the surrounding geographic area.
The release of the radioisotopes from the nuclear fuel was largely controlled by their boiling points, and the majority of the radioactivity present in the core was retained in the reactor.
The release of radioactivity which occurred at Tomsk (While the nuclear centre is known as "Tomsk" it is at Seversk) is a better thing to compare with the Chernobyl release.
en.wikipedia.org /wiki/Chernobyl_disaster   (9381 words)

  
 Nuclear Power Plant Blames Media, Greens for Meltdown Scare - NEWS - MOSNEWS.COM   (Site not responding. Last check: 2007-10-09)
The Balakovsky nuclear power plant has accused the media and environmental activists of spreading rumors about a meltdown at the plant over the weekend.
On Tuesday regional prosecutors launched a criminal case, seeking to persecute whoever was responsible for spreading the rumors.
The nuclear plant said that Greenpeace called the panic a provocation only after the reports of a criminal case, implying the environmental group was somehow fearing prosecution.
www.mosnews.com /news/2004/11/10/nuclearscare.shtml   (449 words)

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