Concern over radiation exposure has led some local, state, and federal agencies to propose a zero dose

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Concern over radiation exposure has led some local, state, and federal agencies to propose a zero dose limit above background radiation. A zero dose limit means that industry could not allow anyone to be exposed to radiation above the average background exposure per year. Why does background radiation change with altitude? Suggest a reason why the airline industry might oppose a zero dose limit.

Data from problem 14.71

An average person is exposed to about 360 millirem of background radiation per year from a variety of natural and man-made sources. About two-thirds of that typically comes from inhalation of 222Rn produced in soil by the decay of 238U. Given that 222Rn decays by alpha emission, estimate the absorbed dose in (a) joules and (b) grays for a 60-kg person from one year’s inhalation of radon.

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Chemistry For Engineering Students

ISBN: 9780357026991

4th Edition

Authors: Lawrence S. Brown, Tom Holme

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