R 325.5227 Controls for access to high radiation areas.

Rule 227. (1) Each entrance or access point to a high radiation area shall be equipped with a control device that complies with 1 of the following: (a) It causes that level of radiation to be reduced below that at which an individual might receive a dose of 100 millirems in 1 hour upon entry into the area. (b) It energizes a conspicuous visible and audible alarm signal in such a manner that the individual entering the high radiation area and the licensee, registrant, or a supervisor of the activity are made aware of the entry. (c) It is locked, except during periods when access to the area is required, with positive control over each individual entry. (2) Controls shall be established in such a way that an individual will not be prevented from leaving a high radiation area. (3) The controls required by subrule (1) (a) of this rule shall be constructed in such a manner that the primary radiation cannot be reactivated until all entrances have been secured, and the radiation on-off control is reset at the control panel. (4) The controls required by subrule (1) (b) of this rule shall be constructed in such a manner that when the warning device is activated, it is necessary to shut off or secure the source of radiation and secure all tripped entrances before being able to inactivate the alarm system. (5) In the case of a high radiation area established for a period of 30 days or less, direct surveillance to prevent unauthorized entry may be substituted for the controls required by this rule. (6) A licensee, registrant, or applicant for a license or registration, may apply to the department for approval of methods not included in subrules (1) and (5) of this rule for controlling access to high radiation areas. The department may approve the proposed alternatives if the licensee, registrant, or applicant demonstrates that the alternative methods of control will prevent unauthorized entry into a high radiation area, and that the requirement of subrule (2) of this rule is met.