I could be wrong, but in your CO2 output anysis I don't believe you're including end-to-end emission figures that include plant construction, fuel mining, enrichment and delivery, and plant decommissioning. It seems the real figure on average is closer to 65 grams per kWh. https://theconversation.com/is-nuclear-power-zero-emission-no-but-it-isnt-high-emission-either-41615