The Canadian Nuclear Factbook 2020 was released by the Canadian Nuclear Association. Page 22 compares the amount of carbon dioxide (CO2) generated by different forms of power generation over its entire lifecycle. This lifecycles includes its construction, the recovery of the fuel (if necessary), power plant operation, and decommissioning.
Carbon Dioxide Emitted over Lifecycle with Different Power Sources (grams carbon dioxide/kiloWatt-Hour (G/KWH))
(from page 22 (23/86) of The Canadian Nuclear Factbook 2020)