Nev. Admin. Code § 459.724 - Safety requirements for operators of X-ray systems
1.
Except as otherwise provided in subsection 7, a registrant shall not permit any
person to operate an X-ray system to conduct X-ray industrial radiography
unless, at all times during radiographic operations, the person wears a film
badge or a thermoluminescence dosimeter and, if the X-ray industrial
radiography takes place at a temporary job site or in a room or building that
does not meet the requirements of NAC
459.335, a direct reading pocket
dosimeter.
2. Direct reading pocket
dosimeters must have a range from zero to 200 millirems (2 millisieverts) and
be recharged at the start of each shift. Each film badge or thermoluminescence
dosimeter must be assigned to and worn by only one person. A film badge must
not be replaced less often than once a month. A thermoluminescence dosimeter
must not be replaced less often than once every 3 months.
3. Direct reading pocket dosimeters must be
read and exposures recorded daily. A person's film badge or thermoluminescence
dosimeter must be immediately processed if his or her pocket dosimeter is
discharged beyond its range. Reports received from the film badge or
thermoluminescence dosimeter processor and records of the pocket dosimeter
readings must be maintained for inspection by the Division for not less than 3
years after the records are made.
4. Each direct reading pocket dosimeter must
be checked at periods not to exceed 1 year for response to radiation. To be
acceptable, a dosimeter must read within plus or minus 20 percent of the true
radiation exposure.
5. If the
ion-chamber pocket dosimeter of a person is found to be off scale, or if the
electronic personal dosimeter of a person reads greater than 200 millirems (2
millisieverts), and the possibility of radiation exposure cannot be ruled out
as the cause:
(a) The film badge or
thermoluminescence dosimeter of that person must be sent for processing within
24 hours; and
(b) The person shall
not resume work with sources of radiation until a determination of his or her
radiation exposure has been made.
6. For the purposes of this section, a person
performing maintenance on an X-ray system shall be deemed to be operating the
system if the X-ray beam is on at any time during the performance of the
maintenance.
7. The provisions of
subsection 1 do not apply to an X-ray system designed for the inspection of
carry-on baggage and an X-ray system designed as a screening system for the
security of personnel. A registrant shall ensure that the operation of such an
X-ray system complies with NAC
459.337.
Notes
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