Each licensee shall monitor exposures to radiation and radioactive
material at levels sufficient to demonstrate compliance with the occupational
dose limits of this subchapter. As a minimum, the following monitoring is
required:
(1) Each licensee shall monitor occupational exposure to radiation
from licensed and unlicensed 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 10% of the limits in §336.305(a) of
this title (relating to Occupational Dose Limits for Adults);
(B) minors likely to receive, in one year from sources external
to the body, a deep dose equivalent in excess of 0.1 rem (one millisievert),
a lens dose equivalent in excess of 0.15 rem (1.5 millisievert), or a shallow
dose equivalent to the skin or to the extremities in excess of 0.5 rem (five
millisievert);
(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 0.1 rem (one millisievert); and
(D) individuals entering a high or very high radiation area.
(2) Each licensee shall monitor (see §336.308 of this
title (relating to Determination of Internal Exposure)) 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 ALI(s) in Table I, Columns 1 and 2, of §336.359,
Appendix B, of this title (relating to Annual Limits on Intake (ALI) and
Derived Air Concentrations (DAC) of Radionuclides for Occupational Exposure;
Effluent Concentrations; Concentrations for Release to Sanitary Sewerage);
and
(B) minors likely to receive, in one year, a committed effective
dose equivalent in excess of 0.1 rem (one millisievert); and
(C) declared pregnant women likely to receive, during the entire
pregnancy, a committed effective dose equivalent in excess of 0.1 rem (one
millisievert).
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