Minn. R. 4731.6080
FIRE PROTECTION
For panoramic irradiators, the radiation room must have: A. heat and smoke detectors, which must activate an audible alarm. The alarm must be capable of alerting a person who is prepared to summon assistance promptly; B. a system whereby the sources automatically become fully shielded if a fire is detected; and C. a fire extinguishing system capable of extinguishing a fire without the entry of personnel into the room. The system for the radiation room must have a shut-off valve to control flooding into unrestricted areas.