Minnesota Administrative Rules
Agency 144 - Health Department
Chapter 4731 - RADIATION SAFETY
IRRADIATORS
Part 4731.6240 - ENTERING AND LEAVING THE RADIATION ROOM

Universal Citation: MN Rules 4731.6240

Current through Register Vol. 49, No. 13, September 23, 2024

Subpart 1. Entry.

Upon first entering the radiation room of a panoramic irradiator after an irradiation, the irradiator operator must use a survey meter to determine that the source has returned to its fully shielded position. The operator must check the functioning of the survey meter with a radiation check source before entry.

Subp. 2. Exit.

Before exiting from and locking the door to the radiation room of a panoramic irradiator prior to a planned irradiation, the irradiator operator must:

A. visually inspect the entire radiation room to verify that no one else is in it; and

B. activate a control in the radiation room that permits the sources to be moved from the shielded position only if the door to the radiation room is locked within a preset time after setting the control.

Subp. 3. Entry during power failure.

During a power failure, the area around the pool of an underwater irradiator may not be entered without using an operable and calibrated radiation survey meter, unless the over-the-pool monitor required under part 4731.6090, subpart 2, is operating with backup power.

Statutory Authority: MS s 144.1202; 144.1203

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