Page 250 - Radiation Safety
P. 250
Typical Average Annual Dose Due to Natural Radiation (British
Isles)
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Radiation Source Dose (uSv/yr)
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• Gamma-ray of terrestrial origin 400
• Carbon-14 10
• Radon,thoron and decay products 800
• Potaassium-40 in body 200
• Cosmic radiation 300
• Uranium and Thorium nuclides in body 170
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Total: 1880
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