Tenn. Comp. R. & Regs. 0400-20-05-.50 - OCCUPATIONAL DOSE LIMITS FOR ADULTS
(1) Except for
planned special exposures under Rule 0400-20-05-.54, the licensee or registrant
shall limit the occupational dose to individual adults to the following annual
dose limits:
(a) An annual limit that is the
lesser of:
1. A total effective dose
equivalent of 5 rems (0.05 Sv) or
2. The sum of the deep-dose equivalent and
the committed dose equivalent to any individual organ or tissue other than the
lens of the eye equal to 50 rems (0.5 Sv).
(b) The annual limits to the lens of the eye,
to the skin of the whole body and to the skin of the extremities:
1. A lens-dose equivalent to 15 rems (0.15
Sv), and
2. A shallow-dose
equivalent of 50 rems (0.50 Sv) to the skin of the whole body or to the skin of
any extremity.
(2) The amount by which occupational dose
from all sources exceeds an individual's annual limits shall be subtracted from
the individual's limits for planned special exposures for the current year and
for lifetime exposure. See parts (1)(f)1 and 2 of Rule
0400-20-05-.54.
(3) When external
exposure is determined by measurement with an external personal monitoring
device, the deep-dose equivalent must be used in place of the effective dose
equivalent, unless the effective dose equivalent is determined by a dosimetry
method approved by the Division or by the Nuclear Regulatory Commission. The
assigned deep-dose equivalent shall be for the part of the body receiving the
highest exposure. The assigned shallow-dose equivalent shall be the dose
averaged over the contiguous 10 cm2 of skin
receiving the highest exposure. Deep-dose, lens-dose and shallow-dose
equivalents may be assessed from surveys or other radiation measurements to
demonstrate compliance with occupational dose limits. However, this may be done
only if the individual monitoring device was not subject to the highest
potential exposure, or the individual monitoring results are
unavailable.
(4) Derived air
concentration (DAC) and annual limit on intake (ALI) values are presented in
Schedule RHS 8-30 and may be used to determine the individual's dose and
demonstrate compliance with the occupational dose limits.
(5) In addition to the annual dose limits,
the licensee shall limit the soluble uranium intake by an individual to 10
milligrams in a week in consideration of chemical toxicity (see footnote 3 of
Schedule RHS 8-30).
(6) The
licensee shall reduce the dose that an individual may be allowed to receive in
the current year by the amount of occupational dose received while employed by
any other person.
Notes
Authority: T.C.A. ยงยง 68-202-201 et seq., and 4-5-201 et seq.
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