OPG's Darlington operating licence amended to allow production of Mo-99

11 November 2021

Darlington nuclear generating station is producing Mo-99 at unit 2The Canadian Nuclear Safety Commission (CNSC) announced on 9 November that it has amended the power reactor operating licence held by Ontario Power Generation (OPG) for its Darlington Nuclear Generating Station following a public hearing in writing. The amended licence authorises OPG to produce molybdenum-99 (Mo-99) at the Darlington plant.

In making its decision, the Commission considered written submissions from OPG, CNSC staff, and 10 intervenors. The CNSC also made participant funding available through its Participant Funding Program, and invited interventions from Indigenous groups, members of the public and stakeholders in this matter. Five requesters received participant funding to assist with their interventions.

After reviewing all submissions, the Commission concluded that OPG is qualified to carry out the Mo-99 production activities that the amended licence will authorise. It also concluded that OPG will make adequate provision for the protection of the environment, and the health and safety of persons.

OPG applied for a licence amendment in December 2018, updated its application in June 2020, and submitted an application addendum in February 2021. In May 2021, CNSC made funding available through the Participant Funding Programme to support Indigenous peoples, members of the public and stakeholders in presenting their views to the Commission. A CNSC panel held a hearing in writing in autumn.  

The amended licence is valid until 30 November 2025.

This licence amendment authorises OPG to produce Mo-99 only in unit 2 of the Darlington plant. OPG plans to install an isotope irradiation system (IIS) in the unit to produce Mo-99, contingent on the release of two regulatory hold points related to the installation and commissioning of the Mo-99 IIS.

Photo: Unit 2 of the Darlington nuclear generating station has been licensed to produce Mo-99 (Photo: OPG)

Privacy Policy
We have updated our privacy policy. In the latest update it explains what cookies are and how we use them on our site. To learn more about cookies and their benefits, please view our privacy policy. Please be aware that parts of this site will not function correctly if you disable cookies. By continuing to use this site, you consent to our use of cookies in accordance with our privacy policy unless you have disabled them.