Introduction To Health Physics
5th Edition
ISBN: 9780071835275
Author: Johnson, Thomas E. (thomas Edward), Cember, Herman.
Publisher: Mcgraw-hill Education,
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Question
Chapter 6, Problem 6.22P
To determine
The dose rate at the top of the container at 1 m over the center of the top
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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?
Assume that there is no dose from approaching and leaving the work location.
Calculate the volume needed to dispense a 21 mCi dose from a Tc-99m DTPA vial containing 400 mCi in 6 ml.
Answer:
✓
ON
"O
2.75 MeV
0.511 MeV
0.511 MeV
B, E= 1.73 MeV
Eave = 0.721 Mev
O MeV
Chapter 6 Solutions
Introduction To Health Physics
Ch. 6 - A 50-µC/kg (approximately 200 mR) pocket dosimeter...Ch. 6 - Prob. 6.2PCh. 6 - Prob. 6.3PCh. 6 - Prob. 6.4PCh. 6 - Prob. 6.5PCh. 6 - Prob. 6.6PCh. 6 - Prob. 6.7PCh. 6 - Prob. 6.8PCh. 6 - Prob. 6.9PCh. 6 - Prob. 6.10P
Ch. 6 - Prob. 6.11PCh. 6 - Prob. 6.12PCh. 6 - Prob. 6.13PCh. 6 - Prob. 6.14PCh. 6 - Prob. 6.15PCh. 6 - Prob. 6.16PCh. 6 - Prob. 6.17PCh. 6 - Prob. 6.19PCh. 6 - Prob. 6.20PCh. 6 - Calculate the average power density, in watts per...Ch. 6 - Prob. 6.22PCh. 6 - Prob. 6.23PCh. 6 - Prob. 6.24PCh. 6 - Prob. 6.26PCh. 6 - Prob. 6.27PCh. 6 - Prob. 6.28PCh. 6 - Prob. 6.29PCh. 6 - Prob. 6.33P
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- Calculate the dose to bones resulting from an exposure of 1.5 R with a 0.3-MeV photon beam. O 3.21 rad O 1.5 rad O 1.4115 Rad O 5.19 radarrow_forwardgiven 4hrs of 80dBA exposure ,2hrs of90 dBA exposure and 2hrs of 85 dBA exposure,what is the % dose? is this person overexposed to noisearrow_forward15. An IV infusion is administered to a 120 lb patient by IV infusion at a rate of 1.8 mg/kg/hr. The drug has a half-life of 8 hours and distributes into a volume of 15 L. a) Find the concentration function C(t) while the infusion is being administered. b) Find the loading dose required to make C(1) a constant if the infusion continues. c) If the loading dose from part b is given followed by 24 hours of infusion at 1.8 mg/kg/hr, graph the concentration for the first 48 hours. d) If the loading dose from part b is given followed by 24 hours of infusion at 1.8 mg/kg/hr, how long will the concentration remain within the therapeutic window of 50-100 mcg/ml?arrow_forward
- Calculate dose to muscle using a 5MeV beam and 50R exposure.arrow_forwardThe (effective) dose to a patient can be measured in milli-Serverts (mSv) or expressed as the time taken to receive the equivalent dose from background radiation. A certain radiograph gives a 1.232 mSv dose which is equivalent to a background radiation dose of 32 weeks.a)How many days in 32 weeks? Give your answer as a whole number. b)Using the information for the radiograph in this question, calculate the UK daily background dose (in mSv/day). Give your answer to 5 decimal places and use it to this accuracy, if needed in subsequent calculations. c)Another radiograph has a 0.0054 mSv dose. Work out the equivalent background dose (in days) for this radiograph. Give your answer to 2 decimal places and use it to this accuracy in any subsequent calculations. d)How many hours is the number of days in part c) equivalent to? Give your answer to 2 decimal places.arrow_forwardIf the output is 24 mR / hour at 40 mAs, at 40 inches, what would the dose be per hour for 20 mAs (give answer in R)?arrow_forward
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