902 KAR 100:145.

Cabinet systems.

 

      RELATES TO: KRS

211.842-211.852, 211.990(4)

      STATUTORY

AUTHORITY: KRS 194.050, 211.090, 211.844

      NECESSITY,

FUNCTION, AND CONFORMITY: The Cabinet for Human Resources is authorized by KRS

211.844 to regulate the possession or use of sources of ionizing or electronic

product radiation and to regulate the handling and disposal of radioactive

waste. The purpose of this administrative regulation is to provide requirements

for the possession, use or operation of cabinet x-ray systems.

 

      Section 1.

Applicability. This administrative regulation shall apply to persons who

possess, use or operate cabinet x-ray systems. This administrative regulation

does not apply to microscopic analytical x-ray systems.

 

      Section 2. For

cabinet x-ray systems installed prior to April 10, 1975, the systems shall:

      (1) Have the

radiation machine and objects exposed thereto, within a permanent enclosure,

within which no person is permitted to remain during the generation of

x-radiation.

      (2) Have adequate

interlocks provided so that if doors or panels to the enclosure are opened, the

radiation-producing machine is shut off automatically. After shutoff, it shall

be possible to restore the machine to full operation only from the control

panel outside the room.

      (3) If the

enclosure is of a size or is so arranged that the operator cannot readily

determine whether the enclosure is unoccupied, there shall be provided:

      (a) Audible or

visible warning signals within the enclosure which are required to be activated

before irradiation can be started.

      (b) Suitable

means of exit, so that a person who accidentally may be shut in can leave the

enclosure without delay, or effective means within the enclosure for preventing

or quickly interrupting the irradiation, and which cannot be reset from outside

the enclosure.

      (4) Except as

provided in subsection (5) of this section, the exposure at accessible regions

two (2) inches from the outside surface of the enclosure cannot exceed

five-tenths (0.5) milliroentgen in one (1) hour.

      (5) If the

registrant has submitted operating and safety procedures, and the cabinet has

approved the procedures, which can show that an individual cannot receive a

radiation dose in excess of the limits specified in these administrative

regulations, the radiation levels specified in subsection (4) of this section

may be exceeded. However, cabinet x-ray systems under this subsection shall not

exceed the limits specified below:

      (a) The exposure

at accessible and occupied areas one (1) foot from the outside surface of the

enclosure shall not exceed ten (10) milliroentgens in one (1) hour.

      (b) The exposure

at accessible and normally unoccupied areas one (1) foot from the outside

surface of the enclosure shall not exceed 100 milliroentgens in one (1) hour.

      (6) Operating

procedures.

      (a) Before a new

installation is placed in routine operation, a radiation protection survey

shall be made. This shall also be done after changes in an existing

installation which might affect its radiation safety.

      (b) A copy of

each radiation protection survey shall be signed and dated by the surveyor, and

kept on file by the individual in charge of the installation.

      (c) The

installation shall be operated in conformance with recommendations of the

protection survey.

      (d) The

registrant shall designate a competent employee as the radiation safety

officer.

 

      Section 3. For

cabinet x-ray systems installed on or after April 10, 1975, systems shall:

      (1) Have the

radiation machine and objects exposed thereto, within a permanent enclosure,

within which no person is permitted to remain during the generation of

x-radiation.

      (2) Be so

constructed that radiation emitted from the cabinet x-ray system shall not

exceed an exposure of five-tenths (0.5) milliroentgen in one (1) hour at points

five (5) centimeters outside the external surface.

      (3) Have a

permanent floor. Support surfaces to which a cabinet x-ray system is

permanently affixed may be deemed the floor of the system.

      (4) Be so

constructed that the insertion of part of the human body through ports or

apertures shall not be possible.

      (5) Be so

constructed that each door of a cabinet x-ray system has a minimum of two (2)

safety interlocks. One (1), but not both of the required interlocks, shall be

configured in a manner that door opening results in physical disconnection of

the energy supply circuit to the high-voltage generator, and this disconnection

shall not be dependent upon moving parts other than the door.

      (6) Be so

constructed that each access panel shall have at least one (1) safety

interlock.

      (7) Following

interruption of x-ray generation by the functioning of a safety interlock, use

of a control provided in accordance with subsection (10)(b) of this section

shall be necessary for resumption of x-ray generation.

      (8) Be so

constructed that failure of a single component of the cabinet x-ray system

shall not cause failure of more than one (1) required safety interlock.

      (9) Be so

constructed that a ground fault shall not result in the generation of x-rays.

      (10) For systems

to which this section is applicable, there shall be provided:

      (a) A

key-actuated control to insure that x-ray generation is not possible with the

key removed.

      (b) A control or

controls to initiate and terminate the generation of x-rays other than by functioning

of a safety interlock of the main power control.

      (c) Two (2)

independent means which indicate if and only if x-rays are being generated,

unless the x-ray generation period is less than one-half (1/2) second, then the

indicators shall be activated for one-half (1/2) second, and which are

discernible from points at which initiation of x-ray generation is possible.

Failure of a single component of the cabinet x-ray system shall not cause

failure of both indicators to perform their intended function. One (1), but not

both, of the indicators required by this paragraph may be a milliammeter

labeled to indicate x-ray tube current. Other indicators shall be legibly

labeled "X-RAY ON."

      (d) Additional

means other than milliammeters which indicate if and only if x-rays are being

generated, unless the x-ray generation period is less than one-half (1/2)

second then the indicators shall be activated for one-half (1/2) second, to

insure that at least one (1) indicator is visible from each door, access panel,

and port, and is legibly labeled "X-RAY ON."

      (11) For cabinet

x-ray systems designed to admit humans, there shall also be provided:

      (a) A control

within the cabinet for preventing and terminating x-ray generation, which

cannot be reset, overridden or bypassed from the outside of the cabinet.

      (b) No means by

which x-ray generation can be initiated from within the cabinet.

      (c) Audible and

visible warning signals within the cabinet which are activated for at least ten

(10) seconds immediately prior to the first initiation of x-ray generation

after closing doors designed to admit humans. Failure of a single component of

the cabinet x-ray system shall not cause failure of both the audible and

visible warning signals.

      (d) A visible

warning signal within the cabinet which remains actuated if and only if x-rays

are being generated, unless the x-ray period is less than one-half (1/2) second

then the indicators shall be activated for one-half (1/2) second.

      (e) Signs

indicating the meaning of the warning signals specified in subsection (11)(c)

and (d) of this section and containing instructions for the use of the control

specified in subsection (11)(a) of this section. These signs shall be legible,

accessible to view, and illuminated if the main power control is in the

"on" position.

      (f) The

designated operator(s) shall have a copy of the manufacturer's operating

procedures and maintenance manual for the equipment being used and shall have

been instructed in the proper techniques of equipment utilization.

      (g) Tests for

proper operation of interlock and door seal systems shall be conducted and

recorded at intervals not to exceed one (1) month.

      (12) Have

permanently affixed or inscribed on the cabinet x-ray system at the location of

controls which can be used to initiate x-ray generation, a clearly legible and

visible label bearing the statement: "CAUTION: X-RAYS PRODUCED WHEN ENERGIZED."

      (13) Have

permanently affixed or inscribed on the cabinet x-ray system adjacent to each

port a clearly legible and visible label bearing the statement: "CAUTION:

DO NOT INSERT ANY PART OF THE BODY WHEN SYSTEM IS ENERGIZED - X-RAY HAZARD."

      (14) Additional

requirements for x-ray baggage inspection systems. X-ray systems designed

primarily for the inspection of carryon baggage at airline, railroad, and bus

terminals, and at similar facilities, shall be provided with means specified in

paragraphs (a) and (b) of this subsection, to insure operator presence at the

control area in a position which permits surveillance of the ports and doors

during generation of x-radiation.

      (a) During an

exposure or preset succession of exposures of one-half (1/2) second or greater

duration, the means provided shall enable the operator to terminate the

exposure or preset succession of exposures at once.

      (b) During an

exposure or preset succession of exposures of less than one-half (1/2) second

duration, the means provided may allow completion of the exposure in progress

but shall enable the operator to prevent additional exposures. (1 Ky.R. 417;

eff. 2-5-75; Am. 12 Ky.R. 1412; eff. 3-4-86; 18 Ky.R. 1570; eff. 1-10-92.)