Irradiator Access

Updated: October 2022

Access to either of the irradiators available at the University of Toronto is controlled by the Radiation Protection Services (RPS); all workers must complete the following steps to obtain access:

Step 1: Obtain a Security Clearance Letter from the Toronto Police Services (see below Appendix 1 of the University of Toronto Security Plan). The applicant must have a government-issued photo ID (see appendix 1 below).

Step 2: Provide an updated CV or resume to RPS.

Step 3: Complete the online training EHS 710 Sealed Source Safety (see for registration)

Step 4: Upon completion of steps 1 to 3, an interview is scheduled with the direct supervisor of the applicant.

Step 5: RPS will contact Campus Safety to issue access to the authorized worker. Note: a fee is charged to the home department of the worker and they must have a valid FOB.

Step 6: Once access has been granted, onsite training on the irradiator will be provided by RPS.

Step 7: The applicant becomes an authorized irradiator user and is attached to the irradiator permit of the supervisor/permit holder. 

Appendix 1 – Sealed Sources Personal Trustworthiness and Reliability Program

The University must ensure that all persons with unescorted access to the irradiator facilities comply with REGDOC-2.12.3, Security of Nuclear Substances: Sealed Sources

As of 31 May 2015 all persons who apply for unescorted access must undergo the following process:

  1. The identity must be confirmed from a reliable original document  such as passport or combination of valid driver licence, health card, and birth certificate;
  2. A Security Clearance Letter from Toronto Police Services must be submitted to RPS. Information about attaining the Clearance Letter and the process to obtain it can be found here.  
  3. If employed at the University of Toronto for less than 5 years, a resume/CV documenting employment will be submitted to RPS which will include contact information of employers;
  4. The current and/or previous work supervisor of the applicant for the last 5 years will be contacted and a reference check of the candidate will be conducted.

Access will be denied if:

  1. The clearance letter or the criminal record name check is incomplete, show “not cleared”, “records may or may not exist”, or show the conviction of a serious crime within the past five years (including murder, attempted murder, or indictable offense involving violence)
  1. A failed reference check.

RPS will inform the applicant in writing of their application process. The applicant may appeal to the University of Toronto Radiation Protection Authority (UTRPA).

The UTRPA decision will be definitive.

Irradiator Access Contact:

Daniel Cardenas,