| (a) For each individual who is likely to receive in
a year an occupational dose requiring monitoring under §336.316
of this title (relating to Conditions Requiring Individual Monitoring
of External and Internal Occupational Dose), the licensee shall determine
the occupational radiation dose received during the current year.
(b) Before permitting an individual to participate
in a planned special exposure, the licensee shall determine:
(1) the internal and external doses from all previous
planned special exposures; and
(2) all doses in excess of the limits, including doses
received during accidents and emergencies, received during the lifetime
of the individual.
(c) In complying with the requirements of subsection
(a) or (b) of this section, a licensee may:
(1) 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
(2) accept, as the record of lifetime cumulative radiation
dose, an up-to-date form "Cumulative Occupational Exposure History"
(see §336.367, Appendix J of this title (relating to Appendix
J. Cumulative Occupational Exposure History)) 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 employer, if the individual is not employed
by the licensee; and
(3) 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, by telephone, telegram, electronic media, or letter.
The licensee shall request a written verification of the dose data
if the authenticity of the transmitted report cannot be established.
(d) The licensee shall record individual exposure histories.
(1) The licensee shall record the exposure history
of each individual, as required by subsection (a) or (b) of this section,
on form "Cumulative Occupational Exposure History" (see §336.367,
Appendix J of this title) or other clear and legible record which
includes all of the information required on that form. 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 obtains reports, the licensee shall use the dose shown
in the report in preparing form "Cumulative Occupational Exposure
History" (see §336.367, Appendix J of this title) or equivalent.
For any period for which the licensee does not obtain a report, the
licensee shall place a notation on form "Cumulative Occupational Exposure
History" (see §336.367, Appendix J of this title) or equivalent
indicating the periods of time for which data are not available.
(2) Licensees are not required to separate historical
dose, obtained and recorded before January 1, 1994, into external
dose equivalent(s) and internal committed dose equivalent(s). Further,
occupational exposure histories obtained and recorded on form "Cumulative
Occupational Exposure History" (see §336.367, Appendix J of this
title) or equivalent 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.
(e) If the licensee is unable to obtain a complete
record of an individual's current and previously accumulated occupational
dose, the licensee shall assume:
(1) in establishing administrative controls under §336.305(f)
of this title (relating to Occupational Dose Limits for Adults) for
the current year, that the allowable dose limit for the individual
is reduced by 1.25 rems (12.5 millisieverts) for each quarter for
which records are unavailable and that the individual was engaged
in activities that could have resulted in occupational radiation exposure;
and
(2) that the individual is not available for planned
special exposures.
(f) The licensee shall retain the records on form "Cumulative
Occupational Exposure History" (see §336.367, Appendix J of this
title) or equivalent until the executive director terminates each
pertinent license requiring this record. The licensee shall retain
records used in preparing form "Cumulative Occupational Exposure History"
(see §336.367, Appendix J of this title) for three years after
the record is made. This includes records required under the standards
for protection against radiation in effect prior to January 1, 1994.
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