Current through Register Vol. 24-18, September 15, 2024
Each licensee or registrant shall monitor occupational
exposure from sources of radiation at levels sufficient to demonstrate
compliance with the occupational dose limits of WAC 246-221-010, 246-221-030,
246-221-050 and 246-221-055.
(1) Each
licensee or registrant shall monitor occupational exposure to radiation from
licensed (or registered) and unlicensed (or unregistered) radiation sources
under the control of the licensee or registrant and shall supply and shall
require the use of individual monitoring devices by:
(a) Each adult likely to receive, in one year
from sources external to the body, a dose in excess of 10 percent of the
applicable limits specified in WAC 246-221-010(1).
(b) Each minor likely to receive, in one year
from 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).
(c) Each declared pregnant
woman 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).
All of the occupational dose limits specified in WAC 246-221-010 continue to be
applicable to the declared pregnant worker as long as the embryo/fetus dose
limit is not exceeded.
(d) Each
individual who enters a high or very high radiation area.
(2) Personnel monitoring devices assigned to
an individual:
(a) Shall not intentionally be
exposed to give a false or erroneous reading;
(b) Shall be assigned to one individual per
exposure interval (i.e., weekly, monthly) and used to determine exposure for
that individual only;
(c) Shall not
be worn by any individual other than that individual originally assigned to the
device;
(d) Personnel monitoring
devices that are exposed while not being worn by the assigned individual shall
be processed and recorded as soon as possible. A replacement monitoring device
shall be assigned to the individual immediately. A record of the circumstances
of the exposure shall be retained.
(3) All personnel dosimeters, except for
direct and indirect reading pocket ionization chambers and those dosimeters
used to measure the dose to any extremities, that require processing to
determine the radiation dose and that are utilized by licensees or registrants
to comply with subsection (1) of this section, with other applicable provisions
of chapters 246-220 through 246-255 WAC, or with conditions specified in a
licensee's license must be processed and evaluated by a dosimetry processor:
(a) Holding current personnel dosimetry
accreditation from either the National Voluntary Laboratory Accreditation
Program (NVLAP) of the National Institute of Standards and Technology (formerly
known as the National Bureau of Standards) or the United States Department of
Energy Laboratory Accreditation Program for Personnel Dosimetry Systems
(DOELAP); and
(b) Approved in this
accreditation process for the type of radiation or radiations included in the
NVLAP or DOELAP program that most closely approximate the type of radiation or
radiations for which the individual wearing the dosimeter is
monitored.
(4) For the
purposes of this section "dosimetry processor" means an individual or an
organization that processes and evaluates personnel monitoring devices in order
to determine the radiation dose delivered to the device.
(5) Each licensee or registrant shall
maintain records of doses received by all individuals for whom monitoring was
required under subsection (1) of this section, and records of doses received
during planned special exposures, accidents, and emergency conditions.
Assessments of dose equivalent and records made using units in effect before
January 1, 1994, need not be changed. These records shall include, when
applicable:
(a) The deep dose equivalent to
the whole body, lens dose equivalent, shallow dose equivalent to the skin, and
shallow dose equivalent to the extremities; and
(b) The total effective dose equivalent when
required by WAC 246-221-015; and
(c) The total of the deep dose equivalent and
the committed dose to the organ receiving the highest total dose (total organ
dose equivalent).
(6) The
licensee or registrant shall maintain the records specified in subsection (5)
of this section on department Form RHF-5A, in accordance with the instructions
provided on the form, or in clear and legible records containing all the
information required by Form RHF-5A; and shall update the information at least
annually.
(7) Each licensee or
registrant shall ensure that individuals, for whom they are required to monitor
occupational doses in accordance with subsection (1) of this section, wear
individual monitoring devices as follows:
(a)
An individual monitoring device used for monitoring the dose to the whole body
shall be worn at the unshielded or least shielded location of the whole body
likely to receive the highest exposure. When a protective apron is worn, the
location of the individual monitoring device is typically at the neck
(collar).
(b) Any additional
individual monitoring device used for monitoring the dose to an embryo/fetus of
a declared pregnant woman, pursuant to WAC 246-221-055(1), shall be located at
the waist under any protective apron being worn by the woman.
(c) An individual monitoring device used for
monitoring the lens dose equivalent, to demonstrate compliance with WAC
246-221-010 (1)(b)(i), shall be located at the neck (collar), outside any
protective apron being worn by the monitored individual, or at an unshielded
location closer to the eye.
(d) An
individual monitoring device used for monitoring the dose to the extremities,
to demonstrate compliance with WAC 246-221-010 (1)(b)(ii), shall be worn on the
extremity likely to receive the highest exposure. Each individual monitoring
device shall be oriented to measure the highest dose to the extremity being
monitored.
Statutory Authority:
RCW
70.98.050. 01-05-110, § 246-221-090,
filed 2/21/01, effective 3/24/01; 94-01-073, § 246-221-090, filed 12/9/93,
effective 1/9/94. Statutory Authority:
RCW
70.98.050 and
70.98.080. 92-06-008 (Order 245),
§ 246-221-090, filed 2/21/92, effective 3/23/92. Statutory Authority:
RCW
43.70.040. 91-02-049 (Order 121), recodified
as § 246-221-090, filed 12/27/90, effective 1/31/91. Statutory Authority:
RCW
70.98.050. 81-01-011 (Order 1570), §
402-24-070, filed 12/8/80; Order 1095, § 402-24-070, filed 2/6/76; Order
708, § 402-24-070, filed 8/24/72; Order 1, § 402-24-070, filed
1/8/69; Rules (part), filed
10/26/66.
