Each licensee or registrant must monitor exposures to
radiation and radioactive material at levels sufficient to demonstrate
compliance with the occupational dose limits of 180 NAC 4 as follows.
022.01
OCCUPATIONAL EXPOSURE
MONITORING. Each licensee or registrant must monitor occupational
exposures to radiation from registered, licensed and unlicensed radiation
sources under the control of the licensee or registrant and must supply and
require the use of individual monitoring devices by:
(A) Adults likely to receive, in one year
from sources external to the body, a dose in excess of 10% of the limits in 180
NAC 4-005.01; and
(B) Minors likely
to receive, in one year, from sources external to the body, a deep dose
equivalent in excess of 1 mSv ( 0.1 rem), a lens dose equivalent in excess of
1.5 mSv ( 0.15 rem), or a shallow dose equivalent to the skin or to the
extremities in excess of 5 mSv ( 0.5 rem);
(C) Declared pregnant women likely to receive
during the entire pregnancy, from radiation sources external to the body, a
deep dose equivalent in excess of 1 mSv ( 0.1 rem). All of the occupational
doses in 180 NAC
4-005 continue to be applicable to the
declared pregnant worker as long as the embryo/fetus dose limit is not
exceeded;
(D) Individuals entering
a high or very high radiation area; and
(E) Individuals working with medical
fluoroscopic equipment:
(i) An individual
monitoring device used for the dose to an embryo/fetus of a declared pregnant
woman, according to 180 NAC 4-012.01, must be located under the protective
apron at the waist;
(ii) An
individual monitoring device used for lens dose equivalent must be located at
the neck or collar, or an unshielded location closer to the eye, outside the
protective apron; and
(iii) When
only one individual monitoring device is used to determine the effective dose
equivalent for external radiation according to 180 NAC 4-005.03, it must be
located at the neck or collar outside the protective apron. When a second
individual monitoring device is used for the same purpose, it must be located
under the protective apron at the waist. The second individual monitoring
device is required for a declared pregnant woman.
022.02
OCCUPATIONAL
INTAKE OF RADIOACTIVE MATERIAL. Each licensee or registrant must
monitor, to determine compliance with 180 NAC
4-008, the occupational intake of
radioactive material by and assess the committed effective dose equivalent to:
(A) Adults likely to receive, in one year, an
intake in excess of 10% of the applicable annual limit on intake (ALI) in Table
I, Columns 1 and 2, of Appendix of 180 NAC 4;
(B) Minors likely to receive, in one year, a
committed effective dose equivalent in excess of 1 mSv ( 0.1 rem);
and
(C) Declared pregnant women
likely to receive, during the entire pregnancy, a committed effective dose
equivalent in excess of 1 mSv ( 0.1 rem).
