Current through September 17, 2024
Prior occupational dose must be determined as follows.
009.01
PRIOR OCCUPATIONAL
DOSE. 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 according to 180 NAC
4-022, the licensee or registrant
must:
(A) Determine the occupational radiation
dose received during the current year; and
(B) Attempt to obtain the records of
cumulative occupational radiation dose.
009.02
PRIOR PLANNED SPECIAL
EXPOSURE AND DOSES IN EXCESS OF THE LIMITS. Prior to permitting an
individual to participate in a planned special exposure, the licensee or
registrant must 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.
009.03
RECORDS OF PRIOR
OCCUPATIONAL DOSE. In complying with the requirements of 180 NAC
4-009.01, 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;
(B) Accept, as the record of cumulative
radiation dose, an up-to-date Department Form NRH-1, 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 or registrant;
or
(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, electronic
media, or letter. The licensee or registrant must request a written
verification of the dose data if the authenticity of the transmitted report
cannot be established.
009.04
EXPOSURE
HISTORY. The licensee or registrant must record the exposure
history, as required by 180 NAC 4-009.01, on Department Form NRH-1, or other
clear and legible record, including all of the information required on that
form.
(A) The form or record must show each
period in which the individual received occupational exposure to radiation or
radioactive material and must be signed by the individual who received the
exposure. For each period for which the licensee or registrant obtains reports,
the licensee or registrant must use the dose shown in the report in preparing
Department Form NRH-1 or equivalent. For any period in which the licensee or
registrant does not obtain a report, the licensee or registrant must place a
notation on Department Form NRH-1 indicating the periods of time for which data
are not available.
(B) Licensees or
registrants are not required to partition historical dose between external dose
equivalent(s) and internal committed dose equivalent(s). Further, occupational
exposure histories obtained and recorded on Department Form NRH-1 before the
May 30, 1994, might not have included effective dose equivalent, but may be
used in the absence of specific information on the intake of radionuclides by
the individual.
009.05
ASSUMPTIONS. 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 must assume:
(A) In establishing administrative controls
under 180 NAC 4-005.06 for the current year, that the allowable dose limit for
the individual is reduced by 12.5 mSv ( 1.25 rem) 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.
009.06
RECORDS
RETENTION. The licensee or registrant must retain the records on
Department Form NRH-1 or equivalent until the Department terminates each
pertinent license or registration requiring this record. The licensee or
registrant must retain records used in preparing Department Form NRH-1 or
equivalent for three years after the record is made. This includes records
required under the standards for protection against radiation in effect prior
to May 30, 1994.
