Class II Nuclear Facilities and Prescribed Equipment Regulations

15 (1) This section applies to licensees who operate Class II nuclear facilities other than geophysical logging accelerators.

(2) Each entrance door to a room in which Class II prescribed equipment is located shall be equipped with a device that, when the door is open, prevents the equipment from being used until a person activates the device from inside the room and closes the door within a preset period of time.

(3) Each entrance, other than a door, to a room in which Class II prescribed equipment is located shall be equipped with a device that, when a person passes through the entrance, prevents the equipment from being used until a person activates the device from inside the room and leaves the room within a preset period of time.

(4) After a device referred to in subsection (2) or (3) is serviced, the licensee shall not use the Class II prescribed equipment until the licensee performs a test or inspection that establishes that the device is functioning in accordance with the licence and the certificate.

(5) Each entrance to a room in which Class II prescribed equipment is located shall be equipped with a readily visible display that indicates the irradiation state of the equipment.

(6) Every room in which Class II prescribed equipment that is used on persons is located shall be equipped with an area radiation monitoring system that is independent of the equipment and that produces an alarm when any entrance door to the room is open while the equipment is delivering a dose of radiation.

(7) Every room in which Class II prescribed equipment that is not used on persons is located shall be equipped with a device that provides a continuous audible signal within the room for 30 seconds before irradiation commences.

(8) Every room in which Class II prescribed equipment is located shall be equipped with emergency stop buttons located as specified in subsection (9) that, when any one of them is pressed, cause all Class II prescribed equipment in the room to automatically revert to a safe state until the pressed button is reset and a switch on the control console of the equipment is activated.

(9) The emergency stop buttons referred to in subsection (8) shall be located in the following places:

• (a) on the control console of all Class II prescribed equipment in the room;

• (b) at each entrance to the room, on the inside of the room; and

• (c) on both sides of all Class II equipment in the room and, in the case of a teletherapy machine, in places that cannot be in the direct beam.

(10) Every Class II nuclear facility shall be equipped with a key switch or code-operated device that prevents persons who are not authorized by the licensee from operating the Class II prescribed equipment in the nuclear facility.

(11) Subsections (2) and (3) and paragraphs (9)(b) and (c) do not apply in respect of a brachytherapy machine that contains less than 50 GBq of a nuclear substance.