Current through Register Vol. 46, No. 19, March 20, 2024
(1) For each individual who is likely to
receive, in a year, an occupational dose requiring monitoring pursuant to this
rule, the licensee or registrant shall:
a.
Determine the occupational radiation dose received during the current year;
and
b. Attempt to obtain the
records of lifetime cumulative occupational radiation dose.
(2) Prior to permitting an
individual to participate in a planned special exposure, the licensee or
registrant shall determine:
a. The internal
and external doses from all previous planned special exposures; and
b. All doses in excess of the limits,
including doses received during accidents and emergencies, received during the
lifetime of the individual; and
c.
All lifetime cumulative occupational radiation dose.
(3) In complying with the requirements of
40.19(1), a licensee or registrant may:
a.
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 employer for work involving radiation
exposure, that discloses the nature and the amount of any occupational dose
that the individual received during the current year; and
b. Accept, as the record of lifetime
cumulative radiation dose, a form 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 employer, if the individual is
not employed by the licensee or registrant; and
c. Obtain reports of the individual's dose
equivalent from the most recent employer for work involving radiation exposure,
or the individual's current employer, if the individual is not employed by the
licensee or registrant, by telephone, telegram, facsimile, or letter. The
licensee or registrant shall request a written verification of the dose data if
the authenticity of the transmitted report cannot be established.
(4)
a. The licensee or registrant shall record
the exposure history, as required by 40.37(136C). The form or record shall show
each period in which the individual received occupational exposure to radiation
or radioactive material 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
report indicating the periods of time for which data are not
available.
b. Licensees or
registrants are not required to reevaluate the separate external dose
equivalents and internal committed dose equivalents or intakes of radionuclides
assessed pursuant to the rules in this chapter in effect on or before January
1, 1994. Further, occupational exposure histories obtained and recorded on or
before January 1, 1994, would not have included effective dose equivalent, but
may be used in the absence of specific information on the intake of
radionuclides by the individual.
(5) 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 shall assume:
a. In establishing administrative controls
pursuant to 40.15(6) for the current year, that the allowable dose limit for
the individual is reduced by 1.25 rem (12.5 mSv) for each quarter for which
records were unavailable and the individual was engaged in activities that
could have resulted in occupational radiation exposure; and
b. That the individual is not available for
planned special exposures.
(6) The licensee or registrant shall retain
the records in
641-40.19
(136C) until the agency terminates each pertinent license or registration
requiring this record. The licensee or registrant shall retain records used in
preparing any record for this subrule for three years after the record is
made.
