Lesson 2/Learning Event 7
If the turn-back dose is encountered by the survey party and the dose rate increases as the party travels
forward, the party will immediately leave the fallout area by the same route used to enter it, unless
instructed otherwise. If the dose rate dose decreases as the party moves ahead, the survey party will
continue to perform its mission along the assigned route.
The following is an example of how you would calculate a turn-back dose. The commander has
established a Operation Exposure Guide (OEG) of 30 cGy(rad) for a survey mission. What is the turn-
back dose?
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