Class II nuclear facilities and prescribed equipment

Security of Sealed Sources

In Canada, Class II nuclear facilities and prescribed equipment are regulated in accordance with the Class II Nuclear Facilities and Prescribed Equipment Regulations under the Nuclear Safety and Control Act (NSCA). All Class II prescribed equipment must be certified by the CNSC before any of these devices can be used in Canada. A general overview of Class II nuclear facilities and prescribed equipment follows. More detailed information on licensing, compliance and certification of Class II prescribed equipment and nuclear facilities can be found by choosing one of the options on the left-hand menu.

For a list of documents relevant to Class II licensed facilities (including regulations, regulatory documents, forms, etc.), see the relevant documents section of the Information for Class II Licensed Facilities page.


Pool-type irradiator facility

Class II Nuclear Facilities

A Class II nuclear facility includes not only the prescribed equipment, but also the building (or parts of the building) housing the equipment, as well as any ancillary equipment needed for operation. The entire facility will be considered during licensing and compliance activities.

Prescribed equipment

The following prescribed equipment is regulated under the Class II Nuclear Facilities and Prescribed Equipment Regulations:


Robotic medical linear accelerator used in cancer treatment

  • any irradiator that uses or contains more than 1015 Becquerels of a nuclear substance
  • any irradiator that requires a shielded enclosure (that is not part of the irradiator itself) and that can deliver a dose of radiation in excess of 1 cGy/min at a distance of 1m
  • any radioactive-source teletherapy machine
  • any particle accelerator that is capable of producing nuclear energy and has a beam energy of less than 50 MeV for beams of particles with a mass less than or equal to 4 amu
  • any particle accelerator that is capable of producing nuclear energy and has a beam energy of less than 15 MeV for beams of particles with a mass greater than 4 amu
  • any brachytherapy remote afterloader

Following a review of the Class II Nuclear Facilities and Prescribed Equipment Regulations and policies for accelerators in 2013, the Canadian Nuclear Safety Commission (CNSC) changed its policy for regulating particle accelerators. The CNSC now exercises its regulatory authority over all particle accelerators operating at a beam energy of 1 megaelectron-volt (MeV) or greater.

View the certification requirements of Class II prescribed equipment.

View the current list of CNSC certified Class II prescribed equipment (PDF).

The servicing of prescribed equipment is also a licensed activity in Canada. Servicing is defined as any maintenance of the equipment, including installation, repair or dismantling, other than routine operation procedures as indicated in the manufacturer's operating manual for the equipment, or as authorized in the licence issued for possession or use of the equipment. If you wish to perform servicing activities in Canada, you must obtain the proper licence to service from the CNSC.

View the licensing requirements for the servicing of prescribed equipment (RD/GD-207).

Some examples of Class II prescribed equipment are shown below.


Cyclotron used for producing medical isotopes


Portal imager for scanning cargo


Medical linear accelerator at a Canadian cancer centre

Licensing

In Canada, activities relating to Class II facilities must be licensed by the CNSC. This includes construction, operation and decommissioning. Servicing Class II prescribed equipment is also a licensed activity. Read more about licensing for Class II nuclear facilities and prescribed equipment.

Radiation safety officers

All licensees that operate Class II nuclear facilities or that service Class II prescribed equipment must have a certified radiation safety officer (RSO) and also designate in writing a qualified temporary replacement. The person occupying the position of RSO is responsible for ensuring that licensed activities are conducted safely and all regulatory expectations are met.

There are two components to the certification process:

  • assessment of the candidate’s qualifications to perform the duties of the position, based on the submitted application
  • assessment of the candidate’s knowledge, based on an examination

If the candidate is able to clearly demonstrate to the CNSC their knowledge, as it relates to the RSO position within their organization, the Commission or a designated officer authorized by the Commission will certify the candidate in the position of RSO. The process for certification of Class II RSOs, along with guidance for applicants, is outlined in REGDOC-2.2.3, Personnel Certification.

For more information on the certification of radiation safety officers, contact the CNSC or your CNSC project officer.

Compliance activities

The CNSC has a number of tools at its disposal to ensure that licensees are in compliance with the Act, regulations, and their licence conditions. Read more about compliance activities for Class II nuclear facilities and prescribed equipment.


Hot cell during a CNSC inspection

Financial guarantees

All licensees are responsible for safely carrying out the nuclear activities authorized under their licences, from the issuance of the licence up to and including safe termination of the licensed activities. A financial guarantee ensures there are funds available for the safe termination of licensed activities when the licensee is unable to carry this out. Since 2015, licensees possessing > 50 MBq of most nuclear substances and/or operating certain Class II prescribed equipment are required to provide a financial guarantee to the CNSC.

Learn more about financial guarantees for class II facilities and prescribed equipment