DHS 157.87(1)(e)1.d.d. During the performance of maintenance, calibration, and other procedures if the procedures require the presence of a primary x-ray beam while any local component in the system is disassembled or removed.

DHS 157.87(1)(e)1.g.g. Whenever a personnel monitoring device shows a significant increase over previous monitoring period or readings are approaching the limits specified in s. DHS 157.22.

DHS 157.87(1)(e)2.2. The registrant shall have access to sufficiently calibrated, appropriate, and operable radiation survey instruments to make physical radiation surveys as required by this subchapter. The instruments shall be capable of detecting and measuring the types and levels of radiation involved including primary, scattered, and leakage radiation.

DHS 157.87(1)(e)3.3. The registrant shall assure the maintenance and calibration of all monitoring and survey instruments used by the registrant or service provider per s. DHS 157.25.

DHS 157.87(1)(e)4.4. The department may approve alternatives to the survey requirements of subd. 1., if the registrant submits to the department a request for approval of an alternative method that otherwise demonstrates compliance with this subchapter and ss. DHS 157.22 and 157.25.

DHS 157.87(1)(f)(f) Posting. Each area or room containing a radiation generating device where an individual may receive 0.02 mSv (2 mrem) in any one hour or 1 mSv (100 mrem) per year shall be conspicuously posted with a sign or signs bearing the radiation symbol described in s. DHS 157.29 (1) and the words ”CAUTION - X-RAY EQUIPMENT,” “CAUTION – RADIATION GENERATING DEVICE,” or words having a similar meaning and intent.

DHS 157.87(1)(g)(g) Security. Radiation generating devices shall be secured in such a way as to be only accessible to, or operable by, authorized personnel when not in operation.

DHS 157.87(1)(h)(h) Operating requirements.

DHS 157.87(1)(h)1.1. ‘Procedures.’ Normal operating procedures shall be written and available to all radiation generating device workers. No individual shall be permitted to operate a radiation generating device in any manner other than that specified in the procedures unless the individual has obtained written approval of the person in control.

DHS 157.87(1)(h)2.a.a. No individual shall bypass a safety device or interlock, or remove shielding unless the individual has obtained the approval of the person in control. The approval shall be for a specified period of time.

DHS 157.87(1)(h)2.b.b. When a safety device or interlock has been bypassed, a readily discernible sign bearing the words ”SAFETY DEVICE NOT WORKING,” or words having a similar meaning and intent, shall be placed on the radiation source housing and at the control switch.

DHS 157.87(1)(h)2.c.c. A record of any bypass of a safety device or interlock shall be maintained. The record shall contain information such as the date the alteration was made, type of alteration, length of time the unit remained in the altered condition, and post bypass survey. The record shall be signed by the person in control, the individual who made the alteration, and the individual who restored the unit to original manufacturer’s specifications.

DHS 157.87(1)(h)3.b.b. All indicators and controls that control the primary beam shall be identifiable and discernible through the use of labels, symbols, software displays or the equivalent.

DHS 157.87(1)(h)4.a.a. An interlock shall not be used to de-activate the x-ray tube or radiation generating device, except in an emergency or during testing of the interlock system.

DHS 157.87(1)(h)4.b.b. After triggering any interlock, it shall only be possible to reset the radiation generating device to full operation from a control panel. All interlocks shall be of a fail-safe design.

DHS 157.87(1)(h)5.5. ‘Multiple sources.’ If more than one x-ray tube assembly or focal spot can be operated sequentially or simultaneously from a control panel, visual indicators shall identify which tube assembly or focal spot has been selected. The selectors shall be identified as to their function. If a letter or number is used, a reference card or table explaining the code shall be affixed to the control panel.

DHS 157.87(1)(i)(i) Repair or modification of x-ray tube or radiation generating device systems. Only trained personnel or registered service providers shall be permitted to install, repair, or make modifications to the radiation generating device. No operation involving removal of covers, shielding materials or tube housings or modifications to shutters, collimators, or beam stops shall be performed without ensuring that the tube is off and will remain off until safe conditions have been restored. The main power switch with a lockout tagout, rather than interlocks, shall be used for routine shutdown in preparation for repairs. It is the responsibility of the registrant to assure that qualified personnel install, repair, or make modifications to the radiation generating device.

DHS 157.87(1)(j)(j) Testing of safety devices.

DHS 157.87(1)(j)1.1. Tests of all safety devices, such as interlocks, shutters, warning lights, and required emergency shut-off switches shall be conducted at intervals not to exceed 6 months on all operable radiation generating devices.

DHS 157.87(1)(j)2.2. If any safety device fails during testing, the radiation generating device shall be removed from service until the safety device failure is corrected or proper temporary administrative controls are established and approved in writing by the person in control.