16 Del. Admin. Code § 4465-H-7.0

Current through Register Vol. 28, No. 7, January 1, 2025

Section 4465-H-7.0 - Additional Requirements for Closed-Beam Radiation Generating Devices (RGDs)

7.1 In addition to the requirements of Part H, Section 6.0, the following applies to all closed-beam x-ray RGDs:

7.1.1 System Enclosure. The radiation source, sample or object, detector, and analyzing crystal (if used) shall be enclosed in a chamber or coupled chambers that cannot be entered by any part of the body during normal operation.

7.1.2 Interlocks. All doors and panels accessing the RGDs shall be interlocked. The interlocks required by this section shall be of a fail-safe design.

7.1.3 Interlock Functions. The system enclosure, sample chamber, etc. closure shall be interlocked with the x-ray tube high voltage supply and/or a shutter in the primary beam so that no x-ray beam can enter the sample or object chamber while it is open unless the interlock has been conspicuously and deliberately defeated. The interlock required by this section shall be of fail-safe design or adequate administrative controls shall be exercised to ensure operations will not continue without a proper functioning interlock.

7.1.4 Radiation Emission Limit. The radiation emission for all closed beam RGDs shall not exceed a dose rate of 0.005 millisieverts (mSv), or 0.5 milliRem (mRem) in one hour at five centimeters outside any accessible surface.

7.1.5 Security Screening Units. Security screening units shall be provided with means to ensure operator presence at the control area in a position which permits surveillance of the openings and doors during generation of x-radiation.

7.1.6 During an exposure or preset succession of exposures of one-half second or greater duration, the means provided shall enable the operator to terminate the exposure or preset succession of exposures at any time.

7.1.7 During an exposure or preset succession of exposures of less than one-half second duration, the means provided may allow completion of the exposure in progress but shall enable the operator to prevent additional exposures.

16 Del. Admin. Code § 4465-H-7.0

22 DE Reg. 401( 11/1/2018) (Final)