Yet this tragedy is happening Japan, there have been opportunists who now come forward to say NO TO NUCLEAR ENERGY, although clear, never said anything about it. Of course, now it is comfortable, convenient, opportunistic and even a nice pose, to oppose these developments in nuclear energy. The main problem is that all these opponents do not ever say what the alternatives to such developments. Because it is clear that were not even aware of the energy needs of planet Earth. Van
Here are some facts about it:
total world energy consumption in 2005 was 500 EJ (= 5 x 1020 J) (or 138,900 TWh) with 86.5% of combustion of fossil fuels, although there are at least 10% of uncertainty in these data. This equates to an average power of 15 TW (= 1.5 x 1013 W) . All this should be clarified that not all the world's economies track their energy consumption with the same rigor, and the exact energy content of oil or ton of coal varies widely in quality. Still, data reveals that energy consumption is huge.
However, most of the world's energy resources from solar radiation from Earth - some of this energy has been stored as fossil energy, another part of it is usable in direct or indirect means such as wind, water or waves. The term solar constant is the amount of incoming solar electromagnetic radiation per unit area measured on the outer surface of the Earth's atmosphere in a plane perpendicular to the rays. The solar constant includes all types of solar radiation, not just visible light. Measurements satellite put it around 1366 watts per square meter , but fluctuates by 6.9% over the year - from 1412 W / m² in early January to the 1321 W / m² in early July, given the variation of the distance from the Sun, a few parts per thousand daily. For the Earth to complete a cross section of 127,400,000 km ², the power output is 1.740 × 1017 watts, plus or minus 3.5%.
estimates of remaining worldwide energy resources vary, with an estimated total of fossil fuels of about 0.4 YJ (1 YJ = 1024J) and a nuclear fuel available such as uranium that exceed the 2.5 YJ. The range of fossil fuels is extended to 0.6 to 3 YJ if estimates of methane hydrate reserves are accurate and if it gets its extraction is technically possible. Due mainly to the Sun, the world also has access to a usable energy exceeds 120 PW (8,000 times the total used in 2004), or 3.8 YJ / yr, dwarfing all non renovables.El problem is that using all the solar energy is not yet available. The development of solar cells are still far from being able to use all the energy that reaches us from the sun.
on fossil fuels can say many things during the twentieth century saw a rapid increase in fossil fuel use is multiplied by twenty. Between 1980 and 2004, annual growth rates were 2%. According to estimates in 2006 of the Administration of the U.S. Energy Information Administration, the 15 TW total energy consumption estimates for 2004 are divided as follows, representing the fossil fuels for 86% of global energy: Coal supplied
energy for the industrial revolution in the eighteenth and nineteenth centuries. With the advent of the automobile, aircraft and the widespread use of electricity, oil became the dominant fuel during the twentieth century. The main growth of fossil fuel oil was reinforced by the continuing decline in the price between 1920 and 1973. After the oil crises of 1973 and 1979, in which oil prices increased from 5 to 45 U.S. dollars per barrel, there was a retreat in oil consumption. Coal and nuclear energy became the fuel of choice for electricity generation and conservation measures increased energy efficiency. In the U.S.
the average car has more than double the miles per gallon. Japan, which withstood the brunt of the oil crisis, made dramatic improvements and now has the world's energy efficiency. After the last forty years, the use of fossil fuels has continued to grow and its share in energy supply has increased. In the past three years, coal, which is one of the dirtiest sources of energy has become the fossil fuel more rapid growth. . However, solar PV is rapidly incorporating as a replacement for fossil fuels as the dominant energy source. Thus, total resources of all fossil fuels YJ 0.4 represent total, while the availability of solar energy is 3.8 YJ year.
However, if we consider nuclear energy, in 2005 accounted for 6.3% of total primary energy supply . Nuclear energy production in 2006 reached 2658 TWh, which represents 16% of total global electricity production. In November 2007, there were 439 operational nuclear reactors worldwide, with a total capacity of 372,002 MW. In 33 other reactors were built, 94 planned and 222 proposed state. Among the nations that do not use it now, 25 countries are I built or proposed. Some countries have announced plans to abolish nuclear energy, but to date only Italy has been implemented (although it continues to import electricity from countries with active nuclear power plants). In addition to this, though Austria, Filipinasy North Korea have built nuclear power plants, these countries have had abortions before they were implemented.
estimates of the International Atomic Energy Agency is the equivalent to 2500 ZJ uranium. This is assuming the use of fast breeder reactor that is able to generate more fissile material than it consumes. It is estimated that the economic uranium deposits currently recoverable tested for reactor fuel cycle directly reach only up to 2 ZJ. Ultimately recoverable Uranium is estimated at 17 ZJ for direct cycle reactors and in 1000 ZJ for fast breeder reactors to the reprocessing.
Neither the resources nor the technology limit the ability of nuclear energy to help meet energy demand during the twenty-first century. Even so, political and environmental implications on nuclear safety and radioactive waste started to limit the growth of energy supply at the end of last century, especially due to certain nuclear accidents. Concerns about the proliferation nuclear (especially about the plutonium produced by breeder reactors) suggest that the development of nuclear energy by countries such as Iran or Syria is actively discouraged by the international community.
Perhaps then the option is nuclear fusion, which is the mechanism used by the Sun, for example. This process generates large amounts of heat based on merging the nuclei of hydrogen isotopes. The heat can theoretically be used to generate electricity. The temperatures and pressures necessary to accommodate the merger making it a very difficult process to control and therefore an unresolved technical challenge. The tantalizing potential of fusion is represented by its theoretical capacity to supply large amounts of energy, with a relatively small associated pollution. Both the United States and the European Union supporting research (such as investing in ITER), and other countries. According to a report, the limited investment has slowed progress in fusion research over the past 20 years, so that is 50 years away from commercial availability.
So then, the problem is what are the alternatives if we oppose nuclear energy. Does wind power? Does solar energy? We are far from these clean energy and infinite (until the end of the Sun, so), are available and can replace massive amounts of energy are generated with other procedures. We must remember, moreover, that by 2030 there will be about 8.3 trillion human beings, which will require resources, health, hygiene, protection, energy, etc. Where is supposed to leave that amount of energy to meet the huge human population will be at least 20 years?
So without further arguments object is easy. More difficult to give options. Much more difficult.
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