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Environmental assessments

Environmental assessments (EAs) help guide the decision-making process and implementation of a proposed nuclear project before it is licensed. The Government of Canada enacted the Impact Assessment Act in 2019 to update its assessment process, but the CNSC still has several projects undergoing federal EAs that are following the process established under the Canadian Environmental Assessment Act, 2012 (CEAA 2012).

Assessing the environmental impacts of projects is done to ensure that:

  • proposed projects are carefully reviewed before federal authorities take action, and will not cause significant negative environmental effects
  • significant negative environmental effects are prevented or mitigated in the area surrounding the project.
  • federal and provincial governments cooperate and coordinate assessments and focus on enhanced communication and cooperation with Indigenous communities
  • the public can participate in the process

Reference materials:

Province Location Proponent Project EA type Registry reference number Status
Ontario Tiverton Bruce Power Inc. Bruce C Nuclear Project Integrated Impact Assessment 88771 Ongoing
Manitoba Pinawa Canadian Nuclear Laboratories In situ decommissioning of the Whiteshell Reactor #1 CEAA 2012 designated project 80124 Ongoing
Ontario Deep River Global First Power Micro Modular Reactor Project CEAA 2012 designated project 80182 Ongoing
Ontario Deep River Canadian Nuclear Laboratories Near Surface Disposal Facility Project CEAA 2012 designated project 80122 Ongoing
Ontario Rolphton Canadian Nuclear Laboratories Nuclear Power Demonstration Closure Project CEAA 2012 designated project 80121 Ongoing
Saskatchewan Wheeler River Denison Mines Corporation Wheeler River project CEAA 2012 designated project 80178 Ongoing
Saskatchewan Patterson Lake NexGen Energy Ltd. Rook I project CEAA 2012 designated project 80171 Ongoing
Saskatchewan Moon Lake Cameco Corporation Postponed – Millennium Mine Project CEAA 2012 designated project 09-03-49928 Ongoing
Nova Scotia Halifax Dalhousie University Decommissioning of  SLOWPOKE-2 reactor facility Screening 05-01-12199 Completed
New Brunswick Point Lepreau NB Power Solid radioactive waste management facility Screening 27931 Completed
Quebec Bécancour Hydro-Québec Modifications to the Gentilly radioactive waste management facilities and refurbishment of the Gentilly-2 nuclear power station Screening 35287 Completed
Quebec Chibougamau Strateco Resources Inc. Matoush Exploration Project Comprehensive study 08-00-46115 Completed
Ontario Chalk River Atomic Energy of Canada Limited (AECL) Decommissioning of the fuel storage and handling bays at Chalk River Laboratories Screening 16692 Completed
Ontario Chalk River Atomic Energy of Canada Limited (AECL) Transfer and storage of radioactive liquid waste Screening 38942 Completed
Ontario Chalk River Atomic Energy of Canada Limited (AECL) Decommissioning of heavy water upgrading plant at Chalk River Laboratories Screening 31931 Completed
Ontario Clarington Ontario Power Generation (OPG) Darlington used fuel dry storage facility Screening 29276 Completed
Ontario Deloro Ontario Ministry of Environment Deloro Mine consolidation site remediation Screening 36265 Completed
Ontario Elliot Lake Rio Algom Ltd. Proposed operation of a radioactive waste facility Screening 16615 Completed
Ontario Ottawa MDS Nordion Waste diversion proposal Screening 38418 Completed
Ontario Peterborough Shield Source Inc. Change in disposal of aqueous liquid waste Screening 35374 Completed
Ontario Pickering Ontario Power Generation (OPG) Pickering waste management facility Screening 33828 Completed
Ontario Pickering Ontario Power Generation (OPG) Resumption of power operation of a nuclear reactor facility Screening 18822 Completed
Ontario Port Granby Low-Level Radioactive Waste Management Office NRCan's Port Granby long-term LLRW management project Screening 30615 Completed
Ontario Port Hope Pine Street Extension approval to expand the current facility by 100% Screening 18999 Completed
Ontario Port Hope Low-Level Radioactive Waste Management Office NRCan's Port Hope Long-Term Low-Level Radioactive Waste Management Project Screening 30619 Completed
Ontario Tiverton Ontario Power Generation (OPG) Construction and operation of additional low-level storage buildings at the Western Waste Management Facility Screening 39121 Completed
Ontario Tiverton Ontario Power Generation (OPG) Construction of a transportation package maintenance building Screening 35879 Completed
Ontario Tiverton Bruce Power Inc. Restart of Bruce A nuclear generating station, units 3 and 4 Screening 29271 Completed
Ontario Tiverton Ontario Power Generation (OPG) Proposed construction and operation of additional storage at Bruce nuclear power development radioactive waste operations site 2 Screening 19002 Completed
Ontario Tiverton Bruce Power Bruce heavy water plant decommissioning Comprehensive Study 16968 Completed
Ontario Whitby Isomedix Corp. Operation of the existing Isomedix industrial irradiator Screening 26486 Completed
Ontario Blind River Cameco Corporation Proposed increase in production at the Blind River Refinery Screening 05-01-12540 Completed
Ontario Blind River Cameco Corporation Proposed modifications to the operation of the Blind River refinery incinerator Screening 04-01-8407 Completed
Ontario Bowmanville Ontario Power Generation Proposal to construct and operate new nuclear power plant Review Panel 07-05-29525 Completed
Ontario Bowmanville Ontario Power Generation (OPG) Refurbishment and continued operation of the Darlington nuclear generating station Screening 11-01-62516 Completed
Ontario Chalk River Atomic Energy of Canada Limited (AECL) Decommissioning of a plutonium tower at Chalk River Laboratories Screening 04-01-6513 Completed
Ontario Chalk River Atomic Energy of Canada Limited (AECL) National Research Universal (NRU) reactor long-term management project Screening 09-01-46668 Completed
Ontario Chalk River Atomic Energy of Canada Limited (AECL) Proposed construction and operation of a bulk materials landfill Screening 07-01-29999 Completed
Ontario Chalk River Atomic Energy of Canada Limited (AECL) Decommissioning of a pool test reactor at Chalk River Laboratories Screening 04-01-6315 Completed
Ontario Chalk River Atomic Energy of Canada Limited (AECL) Proposed construction and operation of a shielded modular above-ground storage project at Chalk River Laboratories Screening 05-01-9335 Completed
Ontario Chalk River Atomic Energy of Canada Limited (AECL) Proposal for the continued operation of the National Research Universal (NRU) reactor at Chalk River Laboratories Screening 04-01-8269 Completed
Ontario Chalk River Atomic Energy of Canada Limited (AECL) Proposed construction and operation of a fuel packaging and storage facility at Chalk River Laboratories Screening 05-01-9148 Completed
Ontario Elliot Lake Denison Mines Inc. Installation of berms at the decommissioned Stanrock Mine Screening 06-01-17616 Completed
Ontario Elliot Lake Rio Algom Ltd. Replacement of the Stanleigh Mine treatment facility Screening 06-01-17079 Completed
Ontario Peterborough GE-Hitachi Proposed addition of a low enriched uranium fuel bundle manufacturing line Screening 07-01-26561 Completed
Ontario Pickering Ontario Power Generation (OPG) Refurbishment and continued operation of the Pickering Units 4 to 8 nuclear generating station Screening 06-01-21226 Completed
Ontario Pickering Ontario Power Generation (OPG) Guaranteed defuelled state of Pickering Units 2 and 3 Screening 08-01-37538 Completed
Ontario Port Hope Zircatec Precision Industries Inc. Proposed slightly enriched uranium CANDU fuel production Screening 06-01-23099 Completed
Ontario Port Hope Cameco Corporation Redevelopment of the Port Hope Conversion Facility (Vision 2010) Comprehensive Study 06-03-22672 Completed
Ontario Tiverton Ontario Power Generation (OPG) Construction and operation of facilities for refurbishment waste storage (RWS) at the Western Waste Management Facility Screening 04-01-8208 Completed
Ontario Tiverton Bruce Power Proposed use of slightly enriched uranium (SEU) fuel at the Bruce B nuclear generating station Screening 04-01-591 Completed
Ontario Tiverton Bruce Power Bruce A refurbishment for life extension and continued operation Screening 04-01-8081 Completed
Manitoba Pinawa Atomic Energy of Canada Limited (AECL) Proposed decommissioning of Whiteshell Laboratories Comprehensive Study 18737 Completed
Nunavut Kivalliq AREVA Resources Canada Inc. The Kiggavik Project Part 5 review under the Nunavut Land Claims Agreement (led by the Nunavut Impact Review Board) N/A Completed
Saskatchewan Cigar Lake and McClean Lake COGEMA Resources Inc. and Cameco Corp. Cigar Lake waste rock disposal in Sue C pit Screening 19651 Completed
Saskatchewan Cluff Lake COGEMA Resources Inc. Decommissioning of Cluff Lake uranium facility Comprehensive Study 18738 Completed
Saskatchewan Waterbury Lake Cameco Corporation Construction and operation of the Cigar Lake uranium mine Screening 36620 Completed
Saskatchewan Gunnar Mine Site Saskatchewan Research Council (SRC) Former Gunnar Mining Limited site rehabilitation project EA under CEAA 2012 07-03-30100 Completed
Saskatchewan Key Lake Cameco Corporation Mill Services Project Screening 08-01-40614 Completed
Saskatchewan Key Lake Cameco Corporation Key Lake Extension Project Screening 55518 Completed
Saskatchewan McClean Lake AREVA Resources Canada Inc. The Midwest Project: mining and milling Comprehensive Study 06-03-17519 Completed
Saskatchewan McClean Lake AREVA Resources Canada Inc. Continuation of mining and milling at McClean Lake operation: Development of Caribou deposit Screening 07-01-25553 Completed
Saskatchewan McClean Lake COGEMA Resources Inc. Mining Sue E ore proposal Screening 03-01-2013 Completed
Saskatchewan McClean Lake AREVA Resources Canada Inc. Ferric sulphate production at McClean Lake Screening 06-01-17277 Completed
Saskatchewan McClean Lake AREVA Resources Canada Inc Receipt and processing of McArthur River Ore at the McClean Lake Operation Project Screening 10-01-53814 Completed
Saskatchewan Rabbit Lake Cameco Corp. and COGEMA Resources Inc. Rabbit Lake solution processing project Screening 05-01-9129 Completed
Saskatchewan Waterbury Lake Cameco Corporation Cigar Lake Water Inflow Management Project Screening 09-01-46666 Completed
Ontario Clarington The Iter International Fusion Energy Institute Iter facility Screening 27068 Cancelled
Ontario Mississauga Atomic Energy of Canada Ltd. (AECL) Monitoring and possession at Lakeshore contaminated soil storage mound Screening 35298 Cancelled
Ontario Port Hope Cameco Corporation Construction and operation of blending circuits for commercial production of slightly enriched uranium (SEU) and blended dysprosium uranium (BDU) Screening 37399 Cancelled
Ontario Brampton Mississauga Metals & Alloys Inc. (MM&A) Installation and operation of an incinerator and the continued operation of the recycling of radioactive contaminated metals Screening 04-01-4079 Cancelled
Ontario Nanticoke Bruce Power Erie Proposal to Construct and Operate New Nuclear Power Plant Comprehensive Study 08-03-43757 Cancelled
Ontario Ottawa Best Theratronics Limited Best Theratronics Class 1B License Application n/a 80022 Cancelled
Ontario Ottawa MDS Nordion Waste diversion program for nuclear medicine radiopharmaceutical operations Screening 05-01-9236 Cancelled
Ontario Pickering Ontario Power Generation Safe Storage of Pickering A Units 2 and 3 Screening 07-01-32411 Cancelled
Ontario Tiverton Bruce Power Bruce Power - Proposal to Construct and Operate New Nuclear Power Plant (application withdrawn) Joint Review Panel 07-03-25738 Cancelled
Ontario Tiverton Ontario Power Generation Proposal to construct and operate a deep geologic repository for disposal of low and intermediate-level radioactive wastes Joint Review Panel 06-05-17520 Cancelled
Saskatchewan Cigar Lake Processing Cigar Lake phase I ore at Rabbit Lake Comprehensive study 17883 Cancelled
Saskatchewan Key Lake Cameco Corporation Uranium recycle project Screening 36525 Cancelled
Saskatchewan McClean Lake COGEMA Resources Inc. Operation of the McClean Lake mine and mill project Screening 37074 Cancelled
Saskatchewan Key Lake Cameco Corporation Increase to flow from the reverse osmosis plant Screening 06-01-21836 Cancelled
Saskatchewan Saskatoon COGEMA Resources Inc. and Cameco Corporation Transfer of Cigar Lake Ore and JEB mill expansion Screening 04-01-3208 Cancelled
Alberta Fort McMurray Atomic Energy of Canada Ltd. (AECL) Possession and monitoring of contaminated soil Screening 35296 Cancelled

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