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3. What will be the radiation intensity from 2590 GBq CO-60 source (SEC above) be at a distance of 5 meters? How many TVL-s

3. What will be the radiation intensity from 2590 GBq CO-60 source (SEC above) be at a distance of 5 meters? How many TVL-s is needed to reduce its intensity to 0.025 mSv/h? Hint: 1st Solve for intensity at 5 meters away. 2nd at this point there is a shield (TVLS) reducing intensity to 0.025, so solve for n.

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