Area requirements

1. Radiation levels. The local components of an analytical x-ray system shall be located and arranged and shall include sufficient shielding or access control such that no radiation levels exist in any area surrounding the local component group which could result in a dose to an individual present therein in excess of the dose limits given in chapter 33.1-10-04.2. For systems utilizing x-ray tubes, these levels shall be met at any specified tube rating. 2. Surveys. a. Radiation surveys, as required by chapter 33.1-10-04.2, of all analytical x-ray systems sufficient to show compliance with subsection 1 shall be performed: (1) Upon installation of the equipment, and at least once every twelve months thereafter. (2) Following any change in the initial arrangement, number, or type of local components in the system. (3) Following any maintenance requiring the disassembly or removal of a local component in the system. (4) During the performance of maintenance and alignment procedures if the procedures require the presence of a primary x-ray beam when any local component in the system is disassembled or removed. (5) Any time a visual inspection of the local components in the system reveals an abnormal condition. (6) Whenever personnel monitoring devices show a significant increase over the previous monitoring period or the readings are approaching the limits specified in chapter 33.1-10-04.2. b. Radiation survey measurements shall not be required if a registrant can demonstrate compliance with subsection 1 to the satisfaction of the department. 3. Posting. Each area or room containing analytical x-ray equipment shall be conspicuously posted with a sign or signs bearing the radiation symbol and the words "CAUTION - X-RAY EQUIPMENT", or words having a similar intent in accordance with chapter 33.1-10-04.2.