Section 0400-20-08-.11 - SHIELDED ROOM X-RAY RADIOGRAPHY(1) The only requirements of this Chapter applying to shielded room x-ray radiography are as follows:(a) All entrances into the shielded room shall be provided with interlocks. After an interlock has been interrupted, broken, or tripped, it shall be possible to cause x-rays to be produced again only from the control panel. Interlocks shall not be used to shut off the x-ray equipment except in an emergency or during testing.(b) Emergency shut-off switches shall be located within the high radiation areas so as to be accessible to individuals therein within the warning period in subparagraph (e) of this paragraph. These switches and their mode of operation shall be identified by a conspicuously posted sign adjacent to the switch. The emergency shut-off switches shall include a manual reset that must be reset at the switch before x-rays can again be produced from the control panel. After an emergency shut-off switch has been activated, it shall be possible to produce x-rays again only from the control panel.(c) The interlock system and the emergency shut-off system shall be separate electrical and/or mechanical systems. .(d) The interior of the shielded room shall be provided with flashing or rotating warning lights that operate when, and only when, radiation is being produced. These lights shall be so positioned that they can be observed from any position or orientation within the room.(e) An audible warning signal within the room shall be actuated for at least ten 10 seconds immediately prior to the first initiation of radiation after the closing of any opening that can admit personnel.(f) The x-ray equipment control panel shall be provided with a locking device to prevent unauthorized use. Such locking device shall, when locked, prevent the production of x-ray radiation by the equipment.(g) All entrances into the shielded room shall be provided with a conspicuously visible warning device, which need not be flashing or rotating but which operates only when radiation is being produced.(h) Surveys shall be made as required in subparagraph (3)(b) of Rule 0400-20-08-.06. Personnel devices providing an audible signal when activated by radiation will be acceptable for this survey. Proper operation of this device shall be checked daily and a record maintained of this check. All personnel working with the x-ray equipment shall be provided with such a device. This device shall be designed so as to clearly indicate entry into a 2 milliroentgen per hour x-ray radiation field.(i) All personnel associated with the x-ray equipment shall be provided with personnel monitoring devices that shall be calibrated for the x-ray energies being utilized. Records of personnel exposure shall be maintained as required in Chapter 0400-20-05.(j) No registrant shall permit any individual to operate a radiation machine for shielded room x-ray radiography until such individual has received a copy of, instruction in, and demonstrated an understanding of operating and emergency procedures for the unit, and competence in its use. (See subparagraphs (2)(a), (c), (d), (e), (g), (h), (i), (j) and (k) of Rule 0400-20-08-.05). These operating and emergency procedures shall be submitted to the Division for approval prior to their adoption.(k) All safety and warning devices, including interlocks and emergency shut-off switches, shall be tested at intervals not to exceed 3 months to determine that they are functioning properly. Records shall be maintained of all tests.(l) If a safety or warning device malfunctions, the x-ray control panel shall be locked in the "off" position. It shall not be used, except as may be necessary for repair or replacement of the malfunctioning safety or warning device, until the safety or warning device is functioning properly.Tenn. Comp. R. & Regs. 0400-20-08-.11
Original rule filed February 22, 2012; effective May 22, 2012.Authority: T.C.A. §§ 68-202-101 et seq., 68-202-201 et seq. and 4-5-201 et seq.