On the survey map, what does the dose rate or contact with the source symbol indicate?

• A. It shows the dose rate or contact with the source, with the lower number being at 30 cm from the source.
• B. It indicates the exact location of the radiation source.
• C. It indicates the maximum permissible dose for the shift.
• D. It indicates the location of the nearest exit.

Answer: (A)

The main idea is that the survey map communicates how much radiation you would receive at that spot. The dose-rate symbol carries two numbers: the higher value shows the dose rate in contact with the source, and the lower value shows the dose rate at a 30 cm distance from the source. This lets you quickly gauge how exposure drops off with distance and plan your work to stay within safe limits. It’s not meant to pinpoint the exact source location, nor does it specify a shift’s maximum permissible dose or indicate where the nearest exit is.