| (C) obtain reports of the individual's dose equivalent
from prior or other current employer(s) for work involving radiation
exposure, or the individual's current employer, if the individual
is not employed by the licensee, by telephone, facsimile, letter,
or other electronic media transmission. The licensee shall request
a written verification of the dose data if the authenticity of the
transmitted report cannot be established.
(3) The licensee shall record the exposure data for
the current year, as required by paragraph (1) of this subsection,
on RC Form 202-3, or other clear and legible record, of all the information
required on that form.
(4) If the licensee is unable to obtain a complete
record of an individual's current occupational dose while employed
by any other licensee, the licensee shall assume in establishing administrative
controls in accordance with subsection (f)(7) of this section for
the current year, that the allowable dose limit for the individual
is reduced by 1.25 rems (12.5 mSv) for each quarter; or 416 mrem (4.16
mSv) for each month for which records were unavailable and the individual
was engaged in activities that could have resulted in occupational
radiation exposure.
(5) If an individual has incomplete (e.g., a lost or
damaged personnel monitoring device) current occupational dose data
for the current year and that individual is employed solely by the
licensee during the current year, the licensee shall:
(A) assume that the allowable dose limit for the individual
is reduced by 1.25 rems (12.5 mSv) for each quarter;
(B) assume that the allowable dose limit for the individual
is reduced by 416 mrem (4.16 mSv) for each month; or
(C) assess an occupational dose for the individual
during the period of missing data using surveys, radiation measurements,
or other comparable data for the purpose of demonstrating compliance
with the occupational dose limits.
(6) Administrative controls established in accordance
with paragraph (4) of this subsection shall be documented and maintained
for inspection by the agency. Occupational dose assessments made in
accordance with paragraph (5) of this subsection and records of data
used to make the assessment shall be maintained for inspection by
the agency. The licensee shall retain the records in accordance with
subsection (rr) of this section.
(k) Planned special exposures. A licensee may authorize
an adult worker to receive doses in addition to and accounted for
separately from the doses received under the limits specified in subsection
(f) of this section provided that each of the following conditions
is satisfied.
(1) The licensee authorizes a planned special exposure
only in an exceptional situation when alternatives that might avoid
the doses estimated to result from the planned special exposure are
unavailable or impractical.
(2) The licensee and employer, if the employer is not
the licensee, specifically authorizes the planned special exposure,
in writing, before the exposure occurs.
(3) Before a planned special exposure, the licensee
ensures that each individual involved is:
(A) informed of the purpose of the planned operation;
(B) informed of the estimated doses and associated
potential risks and specific radiation levels or other conditions
that might be involved in performing the task; and
(C) instructed in the measures to be taken to keep
the dose ALARA considering other risks that may be present.
(4) Prior to permitting an individual to participate
in a planned special exposure, the licensee shall determine:
(A) the internal and external doses from all previous
planned special exposures;
(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
doses.
(5) In complying with the requirements of paragraph
(4)(C) of this subsection, a licensee may:
(A) accept, as the record of lifetime cumulative radiation
dose, an up-to-date RC Form 202-2 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
(B) obtain reports of the individual's dose equivalent
from prior employer(s) for work involving radiation exposure, or the
individual's current employer, if the individual is not employed by
the licensee, by telephone, facsimile, letter, or other electronic
media transmission. The licensee shall request a written verification
of the dose data if the authenticity of the transmitted report cannot
be established.
(6) Subject to subsection (f)(2) of this section, the
licensee shall not authorize a planned special exposure that would
cause an individual to receive a dose from all planned special exposures
and all doses in excess of the limits to exceed:
(A) the numerical values of any of the dose limits
in subsection (f)(1) of this section in any year; and
(B) five times the annual dose limits in subsection
(f)(1) of this section during the individual's lifetime.
(7) The licensee maintains records of the conduct of
a planned special exposure in accordance with subsection (qq) of this
section and submits a written report to the agency in accordance with
subsection (zz) of this section.
(8) The licensee records the best estimate of the dose
resulting from the planned special exposure in the individual's record
and informs the individual, in writing, of the dose within 30 days
from the date of the planned special exposure. The dose from planned
special exposures shall not be considered in controlling future occupational
dose of the individual in accordance with subsection (f)(1) of this
section but shall be included in evaluations required by paragraphs
(4) and (6) of this subsection.
(9) The licensee shall record the exposure history,
as required by paragraph (4) of this subsection, on RC Form 202-2,
or other clear and legible record, of all 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 RC Form 202-2
or equivalent.
(l) Occupational dose limits for minors. The annual
occupational dose limits for minors are 10% of the annual occupational
dose limits specified for adult workers in subsection (f) of this
section.
(m) Dose equivalent to an embryo/fetus.
(1) If a woman declares her pregnancy, the licensee
shall ensure that the dose equivalent to an embryo/fetus during the
entire pregnancy, due to occupational exposure of a declared pregnant
woman, does not exceed 0.5 rem (5 mSv). If a woman chooses not to
declare pregnancy, the occupational dose limits specified in subsection
(f)(1) of this section are applicable to the woman. See subsection
(rr) of this section for recordkeeping requirements.
(2) The licensee shall make efforts to avoid substantial
variation above a uniform monthly exposure rate to a declared pregnant
woman so as to satisfy the limit in paragraph (1) of this subsection.
The National Council on Radiation Protection and Measurements (NCRP)
recommended in NCRP Report No. 91 "Recommendations on Limits for Exposure
to Ionizing Radiation" (June 1, 1987), that no more than 0.05 rem
(0.5 mSv) to the embryo/fetus be received in any one month.
(3) The dose equivalent to an embryo/fetus shall be
taken as:
(A) the dose equivalent to the embryo/fetus from radionuclides
in the embryo/fetus and radionuclides in the declared pregnant woman;
and
(B) the dose equivalent that is most representative
of the dose equivalent to the embryo/fetus from external radiation,
that is, in the mother's lower torso region.
(i) If multiple measurements have not been made, assignment
of the highest deep dose equivalent for the declared pregnant woman
shall be the dose equivalent to the embryo/fetus.
(ii) If multiple measurements have been made, assignment
of the deep dose equivalent for the declared pregnant woman from the
individual monitoring device that is most representative of the dose
equivalent to the embryo/fetus shall be the dose equivalent to the
embryo/fetus. Assignment of the highest deep dose equivalent for the
declared pregnant woman to the embryo/fetus is not required unless
that dose equivalent is also the most representative deep dose equivalent
for the region of the embryo/fetus.
Cont'd... |
