Learn About the Written Examination for EDO Certification

Effective November 1st, 2017, the PCP-09 EDO written examination will be available in an updated electronic format only. The multiple-choice examination will only be available to write at an expanded set of EDO Examination Centres and other participating examination centres. Candidates who have been approved for the PCP-09 written examination may register for the electronic examination (examination dates of November 1st and later) beginning on October 15th, 2017. For more information on eligibility and registration for the electronic examination, please contact the NRCan NDTCB and read additional information below.

The Canadian Nuclear Safety Commission (CNSC) certifies exposure device operators. The Natural Resources Canada (NRCan) Non-Destructive Testing Certification Body (NDTCB) role is to serve as the qualifying body for the written examination for the CNSC's exposure device operator (EDO) certification.

An important step in becoming a certified exposure device operator (CEDO) is to register for and pass the EDO written examination. You can apply for and arrange this through the NRCan NDTCB. You will also need to provide CNSC with proof of appropriate vocational training. For information about training requirements, please contact CNSC.

How to apply and what is required for initial EDO written examination

Before applying to the NRCan NDTCB to write the EDO written examination, you must complete all required prerequisites as set out in the PCP-09 Certified Exposure Device Operator Personnel Certification Guide. You can download the guide from the CNSC website.

If you are ready to apply for your EDO written examination, please go directly to apply for your exposure device operator written examination.

If you were approved to write your written EDO examination prior to the implementation of the PCP-09 electronic examination, you may be required to complete, sign and submit the most current “Application Form for Exposure Device Operator Written Examination” in order to register for the electronic examination. In this circumstance, applicants will not be required to submit any additional fees as long as there are no outstanding fees. Please contact the NRCan NDTCB for more information on eligibility and registration for the electronic examination. 

Please note: The electronic PCP-09 written EDO examination is only available at approved EDO examination centres and other participating examination centres.


If your initial attempt to pass the EDO examination doesn’t succeed, you can attempt a re-examination. You should ensure there are at least 30 days between examination attempts. Candidates who are not successful after three attempts must repeat the vocational training program.

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