Nuclear Substances and Radiation Devices Regulations
18 (1) Subject to subsection (2), every licensee who possesses, uses or produces 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) where the sealed source or shielding is used after being stored for 12 or more consecutive months, immediately before using it;
(b) where the sealed source or shielding is being stored, every 24 months;
(c) where an event that may have damaged the sealed source or shielding has occurred, immediately after the event; and
(d) in all other cases,
(i) where the sealed source or shielding is located in a radiation device, every 12 months, and
(ii) where the sealed source or shielding is not located in a radiation device, every six months.
(2) Subsection (1) does not apply in respect of a sealed source that is
(a) gaseous; or
(b) contained in a static eliminator that has been retained by the licensee for less than 15 months.
(3) 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 radiation device 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.
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