The Morung Express - The limits of nuclear power - 0 views
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Energy Net on 28 Oct 08John McCain has called for building 45 new nuclear power plants by 2030 and 100 eventually. Barack Obama's Web site says, "It is unlikely that we can meet our aggressive climate goals if we eliminate nuclear power from the table." But to what extent can nuclear power really help achieve energy independence? There's a problem about nuclear energy that gets little attention. At present, fossil fuels provide 87 percent of the world's total energy while nuclear power plants provide just 4.8 percent. (All nuclear power plants currently generate electricity, accounting for about 15 percent of world electricity generation, while fossil fuels produce almost 67 percent of the electricity.) The best estimates put the amount of uranium that can be mined economically (what geologists call the reserves) at about 5.5 million metric tons, and according to the International Atomic Energy Agency, today's nuclear power plants use 70,000 metric tons a year of uranium. At this rate of use, the uranium that could be mined economically would last about 80 years.