Crews of commercial airlines are exposed to a higher level of background cosmic radiation during flight time than they would receive on the ground.A single round-trip,coast-to-coast flight gives a dose of about 0.012 rems.If a flight attendant made 200 such flights in one year,how would his/her annual dose compare with a normal annual exposure on the ground of 3.6 mSv? (100 rem = 1 Sv)

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Quizplus · Accepted Answer

The annual dose from 200 flights is 0.012 rems/flight * 200 flights = 2.4 rems = 24 mSv. The normal annual exposure on the ground is 3.6 mSv. 24 mSv is a bit less than 10 times 3.6 mSv.

Crews of Commercial Airlines Are Exposed to a Higher Level