Utah Admin. Code R313-15-502 - Conditions Requiring Individual Monitoring of External and Internal Occupational Dose
Each licensee or registrant shall monitor exposures from sources of radiation at levels sufficient to demonstrate compliance with the occupational dose limits of Rule R313-15. As a minimum:
(1) Each licensee or registrant shall monitor
occupational exposure to radiation from licensed, unlicensed, and registered
radiation sources under the control of the licensee and shall 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 ten percent of the
limits in Subsection
R313-15-201(1);
and
(b) Minors likely to receive,
in one year, from radiation sources external to the body, a deep dose
equivalent in excess of one 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 five mSv (0.5 rem); and
(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 one mSv (0.1 rem); and
(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, pursuant to
Subsection
R313-15-208(1),
shall be located under the protective apron at the waist.
(A) If an individual monitoring device worn
by a declared pregnant woman has a monthly reported dose equivalent value in
excess of 0.5 mSv (50 mrem), the value to be used for determining the dose to
the embryo/fetus, pursuant to Subsection
R313-15-208(3)(a)
for radiation from medical fluoroscopy, may be the value reported by the
individual monitoring device worn at the waist underneath the protective apron
which has been corrected for the potential overestimation of dose recorded by
the monitoring device because of the overlying tissue of the pregnant
individual. This correction shall be performed by a radiation safety officer of
an institutional radiation safety committee, a qualified expert approved by the
Director.
(ii) An
individual monitoring device used for lens dose equivalent shall be located at
the neck, or an unshielded location closer to the eye, outside the protective
apron.
(iii) When only one
individual monitoring device is used to determine the effective dose equivalent
for external radiation pursuant to Subsection
R313-15-201(3)(b),
it shall be located at the neck outside the protective apron. When a second
individual monitoring device is used, for the same purpose, it shall be located
under the protective apron at the waist. Note: The second individual monitoring
device is required for a declared pregnant woman.
(iv) A registrant is not required to supply
and require the use of individual monitoring devices provided the registrant
has conducted a survey, pursuant to Section
R313-15-501,
that demonstrates that the working environment the individual encounters will
not likely result in a dose in excess of ten percent of the limits in
Subsection
R313-15-201(1),
and that the individual is neither a minor nor a declared pregnant
woman.
(2)
Each licensee or registrant shall monitor, to determine compliance with Section
R313-15-204,
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 ten percent of the
applicable ALI(s) in Table I, Columns 1 and 2, of Appendix B of
10 CFR
20.1001 to 20.2402,(2010), which is
incorporated by reference; and
(b)
Minors likely to receive, in one year, a committed effective dose equivalent in
excess of one mSv (0.1 rem); and
(c) Declared pregnant women likely to
receive, during the entire pregnancy, a committed effective dose equivalent in
excess of one mSv (0.1 rem).
Note: All of the occupational doses in Section R313-15-201 continue to be applicable to the declared pregnant worker as long as the embryo/fetus dose limit is not exceeded.
Notes
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