Current through Register Vol. 48, No. 38, September 20, 2024
a) For each individual who may enter the
licensee's or registrant's restricted area and is likely to receive, in a year,
an occupational dose requiring monitoring pursuant to Section
340.520
of this Part, the licensee or registrant shall determine the occupational
radiation dose received during the current year prior to allowing such
individual to enter a restricted area. In order to comply with this
requirement, a licensee or registrant may accept, as a record of the
occupational dose that the individual received during the current year, a
written signed statement from the individual, or from the individual's most
recent employers for work involving radiation exposure, that discloses the
nature and the amount of any occupational dose that the individual may have
received during the current year. To accomplish this, a licensee or registrant
may use the NRC Form 5 or submit equivalent information.
AGENCY NOTE: Licensees and registrants also should attempt to
obtain the records of cumulative occupational radiation dose.
b) Prior to permitting an individual to
participate in a planned special exposure, the licensee shall:
1) Determine the cumulative occupational
radiation dose.
A) In order to comply with
this requirement, a licensee may accept, as the record of cumulative radiation
dose, an up-to-date NRC Form 4, or equivalent, signed by the individual and
countersigned by an appropriate official of the most recent employer for work
involving radiation exposure, or the individual's current employers (if the
individual is not employed by the licensee); and
B) Obtain reports of the individual's dose
equivalent for the time period subsequent to that included in NRC Form 4, or
equivalent, as specified in subsection (b)(1)(A) of this Section. Such reports
shall be signed by the individual and countersigned by an appropriate official
of the most recent employers for work involving radiation exposure, or the
individual's current employers (if the individual is not employed by the
licensee). The information shall be recorded on NRC Form 5, or
equivalent.
2) Determine
the internal and external doses from all previous planned special
exposures.
3) Determine all doses
in excess of the limits received during the lifetime of the individual,
including doses received during accidents and emergencies.
c) The licensee or registrant shall record
the exposure history, as required by subsections (a) and (b) of this Section,
on NRC Form 4 or 5, or equivalent, as applicable, or other clear and legible
record containing all of the information required on that form.
1) The form or record shall show each period
in which the individual received occupational exposure to sources of radiation
and shall be signed by the individual who received the exposure. For each
period for which the licensee or registrant obtains reports, the licensee or
registrant shall use the dose shown in the report in preparing the exposure
history. For any period in which the licensee or registrant does not obtain a
report, the licensee or registrant shall place a notation on the exposure
history indicating the periods of time for which data are not
available.
2) For the purpose of
complying with this requirement, licensees or registrants are not required to
reevaluate the separate external dose equivalents and internal committed dose
equivalents or intakes of radionuclides assessed before January 1, 1994.
Further, although occupational exposure histories obtained and recorded before
January 1, 1994, would not have included effective dose equivalent, such
histories may be used in the absence of specific information on the intake of
radionuclides by the individual.
d) If the licensee or registrant is unable to
obtain a complete record of an individual's current and previously accumulated
occupational dose, the licensee or registrant:
1) When establishing administrative controls
pursuant to Section
340.210(g)
of this Part for the current year, shall assume that the allowable dose limit
for the individual is reduced by 12.5 mSv (1.25 rem) for
each calendar quarter for which records were unavailable and the individual was
engaged in activities that could have resulted in occupational radiation
exposure; and
2) Shall not
authorize the individual to receive any planned special exposures.
e) Records shall be retained in
accordance with the requirements of Section
340.1140(a)
of this Part.
