| 1 year ago :: Apr 04, 2012 - 5:43PM #51 | |
Actually, MM, I am totally serious. Sources at the bottom. One of the interesting things about these reactors, is that being natural, they occured in wet or saturated ore or soil, without containment. The fission products were thus introduced directly into the water table - one of the classic "Oh my god, what do we do now, it's melting" scenarios of modern media hype. The end results of the decay chains are identifiable by isotope and isotope ratio, so we can track how far the radioactive material spread. The short answer - not very far at all - a matter of metres. As we are learning, from places like Fukashima, is that a meltdown is not a total disaster, but rather a bad event that is limited in scope. Sources for the natural nuclear reactors, some academic, and no 'prank' sites: www.scientificamerican.com/article.cfm?i... geology.about.com/od/geophysics/a/aaoklo... www.space.com/13795-natural-nuclear-reac... netfiles.uiuc.edu/mragheb/www/NPRE%20402... apod.nasa.gov/apod/ap021016.html www.physics.isu.edu/radinf/Files/Oklorea... www.scienceagogo.com/news/20040931225231...
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What part of "Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn" do you not understand? --------------------------------------------------------- Wind speeds of Mach 2 would messily disassemble most consumer electronics. --------------------------------------------------------- |
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| 1 year ago :: Apr 04, 2012 - 5:53PM #52 | |
Personally, I tend to worry a bit more about toxic heavy metals released by burning coal.
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What part of "Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn" do you not understand? --------------------------------------------------------- Wind speeds of Mach 2 would messily disassemble most consumer electronics. --------------------------------------------------------- |
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| 1 year ago :: Apr 04, 2012 - 6:04PM #53 | |
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Yes ... Those ALSO ... Mercury, etc. ...
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| 1 year ago :: Apr 04, 2012 - 7:07PM #54 | |
Dave - Just a Man in the Mountains.
I am a Humanist. I believe in a rational philosophy of life, informed by science, inspired by art, and motivated by a desire to do good for its own sake and not by an expectation of a reward or fear of punishment in an afterlife. |
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| 1 year ago :: Apr 04, 2012 - 8:16PM #55 | |
But the demonstrated immobility of radionucleides in the water table totally demolishes one of the scenarios held up as a reason to fear nuclear power.
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What part of "Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn" do you not understand? --------------------------------------------------------- Wind speeds of Mach 2 would messily disassemble most consumer electronics. --------------------------------------------------------- |
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| 1 year ago :: Apr 04, 2012 - 8:57PM #56 | |
Dave - Just a Man in the Mountains.
I am a Humanist. I believe in a rational philosophy of life, informed by science, inspired by art, and motivated by a desire to do good for its own sake and not by an expectation of a reward or fear of punishment in an afterlife. |
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| 1 year ago :: Apr 04, 2012 - 10:24PM #57 | |
Nuclear power is probably less disruptive of the environment than any other form of generally deployable base load generation, at equal power levels. Wind and solar are not suitable for base load power, hydroelectric, unless geography is cooperative can be tremendously disruptive. The Aswan dam, for example, had all sorts of health and environmental effects, some quite bad. As far as I know, no one has yet looked at the ecological effects of large scale tidal systems. Geothermal is good but geographically limited. Fusion is decades off, as are solar power satellites, burning hydrocarbons is wasteful at best. Intermittent power sources need either alternate power systems (and if you are going to build them anyway, why not use them), large areas, extra transmission lines, a lot of investment in putting up towers or arrays, etc. In some applications, they can use storage systems instead of alternate power, but then you need storage systems, many of which revolve around the production and eventual scrapping of lead acid batteries, an environmental contamination issue all by itself. Solar power is at its worst in the winter, with ice and snow, long nights, low angles of incident insolation, and high power demands. It's not so great when you need power, it's cold, it's clouded, snowing, and the day is only eight hours or less, and you have to keep your batteries heated or you will lose a large fraction of their capacity.
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What part of "Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn" do you not understand? --------------------------------------------------------- Wind speeds of Mach 2 would messily disassemble most consumer electronics. --------------------------------------------------------- |
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| 1 year ago :: Apr 04, 2012 - 10:34PM #58 | |
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| 1 year ago :: Apr 05, 2012 - 12:45AM #59 | |
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I'm very glad to read that there is a strong emergent anti-nuclear movement in America these days and hope that when President Obama is reelected this November he will pay close attention to what they have to say. Most reports say that something like 64% of Americans oppose building more nuclear reactors, and this is good to see. |
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| 1 year ago :: Apr 05, 2012 - 2:09PM #60 | |
People who work at nuclear power plants are exposed to about twice the amount of radiation that all people in the US are exposed to from all sources over a year’s time (the “background dose”). This doubling of radiation “background dose” results in an estimated life expectancy loss to these workers of 15 days, according to the committee for Biological Effects of Ionizing Radiation V (BEIR V). The estimated life expectancy loss that results from working in manufacturing jobs is three times that amount: 40 days. www.physics.isu.edu/radinf/risk.htm The primary risk associated with radiation exposure is an increased risk of cancer. The degree of risk depends on the amount of radiation dose received, the time period in which the dose is received, and the body parts that receive the radiation dose. Although scientists assume that low-level radiation doses increase one’s risk of cancer, studies have not demonstrated any adverse health effects in individuals who are chronically exposed to small radiation doses over a period of many years (e.g., a total of up to 10,000 mrem above the average background dose). The increased risk of cancer from occupational radiation exposure is small when compared to the normal cancer rate in today’s society. For example, the current risk of dying from all types of cancer in the United States is approximately 25 percent -- while a person who receives a whole-body radiation dose of 25,000 mrem over his or her lifetime has a risk of dying from cancer of 26 percent -- a one percent increase. www.nucsafe.com/cms/Radiation+Risks/41.h... Below 10 rem (which includes occupational and environmental exposures) risks of health effects are either too small to be observed or are non-existent. www.physics.isu.edu/radinf/hprisk.htm
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