U.S. Nuclear Regulatory Commission
Question 144: When will licensees be permitted to use
weighting factors other than one to determine and record
external whole body dose (effective dose equivalent from
external sources) as the occupational dose of record?
Answer: After the NRC has received and approved an
application for the use of weighting factors (Wt) other
than one for obtaining the effective dose equivalent. See
the discussion of the comment on the use of effective dose
equivalent for external exposure in the Statement of
Considerations (56 FR 23368, third column and 23369, first
column). The response to the comment concludes with the
statement that "The use of other weighting factors for
external exposure may be approved on a case-by-case basis
upon request to the NRC." (Reference: 10 CFR 20.1003).