Note that the "CO2/kWh equivalent emissions" given on the page are provided with source to document describing methodology: UNECE 2022. Can't link you to specif

Note that the "CO2/kWh equivalent emissions" given on the page are provided with source to document describing methodology: UNECE 2022. Can't link you to specific place right now, but quick google gives a bunch of starting points like https://unece.org/sites/default/files/2022-04/LCA_3_FINAL%20March%202022.pdf https://unece.org/sites/default/files/2022-04/LCA_3_FINAL%20... Inside you will find description of the model for various power sources including what total lifecycle sources of emissions contribute how much. Consider also the ridiculous power density of nuclear fuels, best visualized IMHO in this good old XKCD comic: https://xkcd.com/1162/ https://xkcd.com/1162/