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Chalk River Laboratories

On November 3, 2014, all licences for the operation of Chalk River Laboratories (CRL) were transferred from Atomic Energy of Canada Limited (AECL) to Canadian Nuclear Laboratories Ltd. (CNL). CNL manages operations and performs all functions previously done by AECL at CRL. The CNSC has full-time dedicated staff onsite, who periodically do inspections to evaluate operations and to verify compliance with regulatory requirements and licence conditions.

Facility information

Aerial view of AECL's Chalk River Laboratories

Aerial view of CNL's Chalk River Laboratories

Location: Chalk River, ON
Licensee: Canadian Nuclear Laboratories Ltd. (CNL)
Status: Operating
Licence issued: April 1, 2018
Licence expires: March 31, 2028
Start of commercial operation: 1945
Licensing documentation: Request for copy of CNL’s Chalk River Laboratories licence and licence condition handbook by email

CRL is one of the most complex laboratories in Canada, with activities ranging from services and development related to the nuclear industry, to other science areas such as physics, metallurgy, chemistry, biology, and engineering.

The NRU reactor, one of the world's most versatile research reactors, operated at CRL since 1957. On March 31, 2018, it was shut down and put into safe storage.

Focus on safety and the environment

The CNSC is committed to protecting the safety of people and the environment. Click below for current environmental and safety performance data for Chalk River Laboratories.

CNL website

AECL website

Latest facility-specific announcements

Chalk River Laboratories - decorative image

Disclosure protocol

As part of the CNSC's regulatory requirements, major licensees must have robust public information and disclosure programs in place. To obtain more information, visit CNL's website

Regulatory reporting

Other key topics

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