Question 435: The rule requires that "the assigned
deep-dose equivalent... must be for the part of the body
receiving the highest exposure. [The dose] may be assessed
from surveys or other radiation measurements for the
purpose of demonstrating compliance with the occupational
dose limits, if the individual monitoring device was not in
the region of highest potential exposure." In the event of
a hot particle exposure to a portion of the whole body, it
is unlikely that the associated deep dose equivalent (DDE)
resulting from the hot particle gamma radiation would be
appropriately measured by an individual monitoring device
due to the localized nature of the exposure. Is it
required that the DDE associated with a hot particle
exposure be assessed and added to the monitored DDE for the
purpose of demonstrating compliance with the occupational
dose limits?
Answer: Yes. Although, for a hot particle on the skin,
the deep dose equivalent is generally a small fraction of
the shallow dose equivalent, it does need to be assessed.
(Reference: 10 CFR 20.1201).