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Why is it that nuclear power plants require such large numbers of temporary workers and day laborers? The answer is directly related to the high levels of radiation contamination inside the power plants. There is always a danger that workers will be exposed to high doses of radiation if they work beyond a certain length of time in areas of the plants where radiation levels are high. Thus electric power companies require as many laborers as possible so that jobs can be rotated in order to reduce the amount of radiation to which individual workers are exposed. The number of subcontracted workers has grown very rapidly not simply because of the increase in power plants, but also because radiation contamination at nuclear power plants worsens as time passes. Consequently it is necessary to increase both the number of subcontracted workers required during regular inspections and the number needed for everyday maintenance.