Information for Class II licensed facilities

Documents relevant to Class II nuclear facilities

Act and regulations

Regulatory documents and licensing guides


Safety posters

Security of sealed sources

In 2014, REGDOC-2.12.3, Security of Nuclear Substances: Sealed Sources, was introduced to augment the security of sealed sources under the Nuclear Safety and Control Act (NSCA). The new requirements as set out in REGDOC-2.12.3 were implemented in 2015 for category 1 and 2 radioactive sources. The remaining categories (3–5) will be implemented in 2018. These augmented requirements are now a condition of Class II licences authorizing the use of sealed sources.

Below are the most commonly cited non-compliances by CNSC inspectors, based on the requirements set out in REGDOC-2.12.3.

  • Category 1–3 sources are required to have a minimum of two physical barriers to secure materials. (section 3.2.4)  
    • Consistent and regular review of physical barriers is required to ensure barriers cannot be compromised. 
  • Secure storage containers must be fastened to a wall or floor. (section 3.2.4)
  • Regular passcode updates are required, specifically for key or room access. (section 3.2.3)
  • Adequate mandatory security training (initial and refresher training) is required for all personnel handling and protecting radioactive sources and equipment. (section 3.3.2)
  • Employment verifications related to criminal records require review at least every five years. (section 3.3.3)

Licensees are encouraged to conduct regular review of security programs to ensure effectiveness and efficiency. For questions or concerns, contact your project officer.

Common non-compliances

When the CNSC performs an inspection at a facility, its inspectors assess the licensee’s program against the applicable regulations and the licence conditions that appear in their licence. Any deficiencies that are noted are cited as non-compliances against the applicable regulation or licence condition. The frequency and types of non-compliances change as regulatory focus shifts or as different technologies are adopted. Regardless of these changes, inspectors have noted the most common non-compliances that occur from year to year. 

Figure 1: Top 10 regulations cited by inspectors during inspections of Class II nuclear facilities

NOTE: LC = Licence Condition / GN = General Nuclear Safety and Control Regulations / CII = Class II Nuclear Facility and Prescribed Equipment Regulations / RP = Radiation Protection Regulations

Figure 1 shows the top 10 cited regulations for Class II nuclear facilities between 2013 and 2015 and table 1 indicates what action would result in a non-compliance against each regulation. The frequency is represented by the percentage of inspections in which each regulation was cited at least once. It is possible for more than one non-compliance to be cited against a single regulation. However, for the purposes of figure 1, these were counted only once.It is clear from figure 1 that the same regulations are consistently cited from year to year.

Table 1: Description of the most commonly cited regulatory references

Regulatory reference


Example of a non-compliance

GN 12(1)(c)

All reasonable safety precautions are taken

The licensee does not consistently ensure the room is empty when pressing the last person out button

LC 2917

Policies/procedures submitted to the CNSC are followed

The licensee does not have full view of the room from the last person out button

LC 2920

Policies/procedures are submitted to the CNSC

The licensee has updated their procedures but has not informed the CNSC

CII 21(2)

Required records are maintained

The licensee has not maintained records of all servicing performed

GN 12(1)(b)

Required training is provided to staff

The licensee has not provided ancillary staff with training commensurate with the role

RP 4

An adequate radiation protection program is in place

The licensee does not have sufficient oversight of licensed activities

CII 15.1

Replacement of radiation safety officer (RSO) is designated

The licensee has not properly (in writing) designated a person who is qualified to replace the RSO

CII 15(2)

Door interlocks and last person out (LPO) are installed as prescribed

The licensee has not installed a door interlock or LPO in an enclosure contained within the facility

CII 15(5)

Radiation warning lights are installed as prescribed

The licensee has not installed a radiation warning light in an enclosure contained within the facility

RP 20(1)

 Each container/device containing a nuclear substance is appropriately labelled

The licensee has not labelled radioactive sources correctly

NOTE: LC = Licence Condition / GN = General Nuclear Safety and Control Regulations / CII = Class II Nuclear Facility and Prescribed Equipment Regulations / RP = Radiation Protection Regulations

Dose to workers

Each licensee that operates a Class II nuclear facility is required to have a radiation protection program. The radiation protection program ensures that contamination levels and radiation doses received by workers are monitored, controlled and maintained below regulatory dose limits, and kept at levels that are as low as reasonably achievable (ALARA). Licensees are expected to monitor worker doses and to designate as a nuclear energy worker (NEW) anyone who is likely to receive more than 1 millisievert (mSv) per year in the course of their work.

A total of 6,368 workers at Class II facilities had their occupational doses monitored in 2015. Of these, 4,978 workers were designated as NEWs. There are four main sectors in which Class II facilities can be categorized, the breakdown of which is given in figure 2.

Figure 2: Dose distribution by sector for all workers reported in 2015

NOTE: BDL = Below detectable limit

Additional resources

Presentations by staff in the Accelerators and Class II Facilities Division (ACFD)

Participating in outreach activities is an important aspect of the CNSC’s regulatory strategy. The following presentations were given by ACFD staff during the past year: