Class II Nuclear Facilities and Prescribed Equipment Regulations (SOR/2000-205)

17. (1) Every licensee who installs a sealed source in any Class II prescribed equipment other than a pool-type irradiator shall, after installing the source, take measurements of radiation dose rates when the equipment is not in the irradiation mode and notify the Commission in writing as soon as practicable if the dose rate at any location that is 1 m from any sealed source in its shielded position exceeds the manufacturer’s specifications.

(2) Every licensee who possesses a radioactive source teletherapy machine shall, after the installation of a sealed source in the machine, take measurements of radiation dose rates at all accessible locations outside the room in which the machine is located, with the machine in the irradiation mode and operating under conditions that will result in the maximum dose rate at each location.

18. (1) Every licensee who uses, decommissions or services Class II prescribed equipment shall make available to each worker a radiation survey meter that

• (a) has been calibrated within the 12 months preceding its use;

• (b) is capable of measuring the gamma, X-ray and, if applicable, neutron radiation from the sealed source and the Class II prescribed equipment; and

• (c) indicates whether the power level of its batteries is sufficient for its operation.

(2) No person shall use, for the purposes of the Act, the regulations made under the Act or an order or a licence, a radiation survey meter that has not been calibrated within the 12 months preceding its use.

19. (1) Every licensee who possesses or uses, in or for Class II prescribed equipment, either a sealed source containing 50 MBq or more of a nuclear substance or a nuclear substance as shielding shall, at the following times, conduct leak tests on the sealed source or shielding using instruments and procedures that enable the licensee to detect a leakage of 200 Bq or less of the nuclear substance:

• (a) if the sealed source or shielding is used after being stored for 12 or more consecutive months, immediately before using it;

• (b) if the sealed source or shielding is being stored, every 24 months;

• (c) if an event that may have damaged the sealed source or shielding has occurred, immediately after the event; and

• (d) in all other cases,

  • (i) if the sealed source or shielding is located inside Class II prescribed equipment, every 12 months, and

  • (ii) if the sealed source or shielding is not located inside Class II prescribed equipment, every six months.

(2) Where a licensee, in the course of conducting a leak test on a sealed source or on shielding, detects the leakage of 200 Bq or more of a nuclear substance, the licensee shall

• (a) discontinue using the sealed source or shielding;

• (b) discontinue using the Class II prescribed equipment in which the sealed source or shielding is located or may have been located;

• (c) take measures to limit the spread of radioactive contamination from the sealed source or shielding; and

• (d) immediately after complying with paragraphs (a) to (c), notify the Commission that the leakage has been detected.

(3) Subsection (1) does not apply in respect of a sealed source that is used or stored underwater in a Class II nuclear facility that consists of a pool-type irradiator equipped with a device capable of detecting water-borne contamination of 200 Bq or less of a nuclear substance.