Cite : Accurate Quantification of Nuclear Power's Carbon Footprint
”There is no industry standard for reporting the GHG emissions of a nuclear reactor. [6] Thus, it is easy for a nuclear power company to devise its own methodology for CO2 emissions that reports they are emitting few GHGs when in reality they aren’t accounting for all the CO2 that is emitted.”
” Sovacool et. al. in 2008 performed a survey of 103 different articles that quantified the GHG emission of nuclear power. They found that these studies ranged from 1.4 g CO2/kWh to 288 g CO2/kWh. “
The median numbers for Coal are 820 and natural gas combined cycle are 490 per the 2014 IPCC.