Introduction To Health Physics
5th Edition
ISBN: 9780071835275
Author: Johnson, Thomas E. (thomas Edward), Cember, Herman.
Publisher: Mcgraw-hill Education,
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Chapter 10, Problem 10.2P
To determine
To Calculate: The thickness of lead to be added to the wall.
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A Co-60 source gives a gamma dose rate of 120 μSv/h at 2.2 m away. At what distance (in
meter) will the dose rate be 59 µSv/h? Provide your answer with 1 decimal place.
A worker will need to conduct a repair to a pipe containing radioactive waste. The pipe is 10 m
long, and the worker will need to be standing 50 cm from the pipe. A remote detector was
used to take a reading of 1.5 R/hr at 3 m from the pipe.
a) What is the dose rate at the work position?
b) If the worker's dose limit is 30 rad, how long will he have to complete the work?
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If the dose rate from a sample of Ra-223 was
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