If the dose rate in a high radiation area is 120 mrem/hour, does this trigger dosimetry requirements?

If the dose rate in a high radiation area is 120 mrem/hour, does this trigger dosimetry requirements?

• A. No, only external exposures matter.
• B. Yes, but only if cumulative exposure exceeds 100 mrem.
• C. No, only annual exposure matters.
• D. Yes, because the dose rate is at least 100 mrem/hour.

Answer: (D)

The main idea is that dosimetry requirements kick in when the external exposure rate in a workplace area is above a regulatory threshold. For a high radiation area, that threshold is 100 mrem per hour. Being at 120 mrem/hour means the area meets the criteria for a high radiation area, so workers entering or working there must be monitored with dosimetry. This ensures we track potential occupational dose and prevent exceeding annual limits, since even short visits can add up quickly to meaningful doses. In other words, the presence of a dose rate above 100 mrem/hour triggers the need to wear and record dosimeters, regardless of how much total exposure might be accumulated over a longer period. So, yes, the rate being 120 mrem/hour satisfies the trigger for dosimetry requirements.

The main idea is that dosimetry requirements kick in when the external exposure rate in a workplace area is above a regulatory threshold. For a high radiation area, that threshold is 100 mrem per hour. Being at 120 mrem/hour means the area meets the criteria for a high radiation area, so workers entering or working there must be monitored with dosimetry.

This ensures we track potential occupational dose and prevent exceeding annual limits, since even short visits can add up quickly to meaningful doses. In other words, the presence of a dose rate above 100 mrem/hour triggers the need to wear and record dosimeters, regardless of how much total exposure might be accumulated over a longer period.

So, yes, the rate being 120 mrem/hour satisfies the trigger for dosimetry requirements.