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Giancoli's Physics: Principles with Applications, 7th Edition
31
Nuclear Energy; Effects and Uses of Radiation
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31-1: Nuclear Reactions, Transmutation
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31-2: Nuclear Fission
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31-3: Nuclear Fusion
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31-5: Dosimetry
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Question by Giancoli, Douglas C., Physics: Principles with Applications, 7th Ed., ©2014, Reprinted by permission of Pearson Education Inc., New York.
Problem 51
Q

Assume a liter of milk typically has an activity of 2000 pCi due to 1940K{^{40}_{19}\textrm{K}}. If a person drinks two glasses (0.5 L) per day, estimate the total effective dose (in Sv and in rem) received in a year. As a crude model, assume the milk stays in the stomach 12 hr and is then released. Assume also that roughly 10% of the 1.5 MeV released per decay is absorbed by the body. Compare your result to the normal allowed dose of 100 mrem per year. Make your estimate for

  1. a 60-kg adult, and
  2. a 6-kg baby.
A
  1. 2×10−7 Sv/yr, 2×10−5 rem/yr2 \times 10^{-7} \textrm{ Sv/yr, } 2 \times 10^{-5} \textrm{ rem/yr}, Fraction allowed: 2×10−42 \times 10^{-4}
  2. 2×10−6 Sv/yr, 2×10−4 rem/yr2 \times 10^{-6} \textrm{ Sv/yr, } 2 \times 10^{-4} \textrm{ rem/yr}. Fraction allowed: 2×10−3 2 \times 10^{-3}
Giancoli 7th Edition, Chapter 31, Problem 51 solution video poster
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