Sealed Source Test - QUESTION 14

The beta dose rate 30 cm away from a Cs-137 source is approximately 750 millirem/hour per millicurie.  Since the beta dose is regarded as dose to the skin or shallow dose equivalent, how long will it take to reach the annual shallow dose equivalent (skin dose) limit for a person sitting 30 cm away from a 10 millicurie unshielded source?

a.  Less than 20 minutes

b.  6.6 hours

c.  66 hours

d.  1 day

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