[rory096]

Don't miss the assumptions they're relying on:

>Emissions are considered per kWh of produced electricity (kWhel), including emissions that occur over the complete life-cycle of a technology (cradle to grave). We use the following values (based on Sovacool (2008), Lenzen (2008) and updated values from Jacobson (2009); nuclear: 66 g-CO2/kWhel, onshore wind: 10 gCO2/kWhel, PV (no difference between utility-scale and rooftop): 30 g-CO2/kWhel.

That paper Jacobson (2009), the subject of the dispute mentioned above, factors in emissions from the burning of cities from nuclear war (at the high end, one city every 30 years), as well the "opportunity cost from planning-to-operation delays." The latter assumes 10-19 years to set up a nuclear plant, during which time emissions from a hypothetical incumbent coal plant are attributed to it. Somehow, PVs and wind have no opportunity costs from delays (though section 4b says they should take 2-5 years). Apparently PV production scaling will never bottleneck as they're deployed grid-wide.

http://www.rsc.org/delivery/_ArticleLinking/DisplayHTMLArtic...