Minn. R. agency 144, ch. 4731, IRRADIATORS, pt. 4731.6240

Current through Register Vol. 49, No. 29, 2025

Part 4731.6240 - ENTERING AND LEAVING THE RADIATION ROOM

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.

Minn. R. agency 144, ch. 4731, IRRADIATORS, pt. 4731.6240

29 SR 755

Statutory Authority: MS s 144.1202; 144.1203