A mono-directional y-ray source (1 MeV energy) yields an equivalent dose rate of 100 mrem/hr at a distance 2 meters from the 10. source. a. Describe the three different ways that an individual can meet the principles of ALARA if they must work near this source. b. Calculate how far the worker must move away in meters from the source to reduce the equivalent dose rate by a factor of 4? c. The worker gets some lead to build a shield. How thick (in cm) does the shield need to be at 2 meters to reduce the equivalent dose rate by a factor of 4?
A mono-directional y-ray source (1 MeV energy) yields an equivalent dose rate of 100 mrem/hr at a distance 2 meters from the 10. source. a. Describe the three different ways that an individual can meet the principles of ALARA if they must work near this source. b. Calculate how far the worker must move away in meters from the source to reduce the equivalent dose rate by a factor of 4? c. The worker gets some lead to build a shield. How thick (in cm) does the shield need to be at 2 meters to reduce the equivalent dose rate by a factor of 4?
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Transcribed Image Text:A mono-directional y-ray source (1 MeV energy) yields an
equivalent dose rate of 100 mrem/hr at a distance 2 meters from the
10.
source.
a. Describe the three different ways that an individual can meet the
principles of ALARA if they must work near this source.
b. Calculate how far the worker must move away in meters from the
source to reduce the equivalent dose rate by a factor of 4?
c. The worker gets some lead to build a shield. How thick (in cm)
does the shield need to be at 2 meters to reduce the equivalent
dose rate by a factor of 4?
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