is3_110 - Radiological Emergency Management Independent...

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Radiological Emergency Management Independent Study Course 5-2 OTHER RADIATION SOURCES The attention that large radioactive sources such as nuclear power plants and nuclear devices has received recently has led to a greater understanding of the hazards from these sources of radiation and the need for emergency plans to respond to situations involving an accident or threat associated with them. However, radiation and radioactivity is present all the time, and has existed on the earth long before life emerged. Indeed, they were present in the universe long before the earth itself existed. Radiation contributed to the formation of the universe, as far as we can tell, and has pervaded the cosmos ever since. Radioactive materials became part of the earth at its very conception. Even man himself is slightly radioactive. However, it has only been a little over one century since man discovered this phenomenon and began to use it for beneficial reasons. Radioactive materials are utilized in a broad array of activities which contribute to the total amount of radiation exposure a typical person receives.
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