I couldn't wait so dug up some numbers from various sources in advance. For coal:

• A 'typical' hard coal powerplant: 8.5 TWh electricity from 2.5 million tons, that's about 0.3 kg mined for 1 kWh.

• The most recent German brown coal (lignite) powerplant: 1.3 TWh electricity from 1 million tons, that's 0.77 kg mined for 1 kWh.

For nuclear: calculating with 0.85% U in U3O8, and a ratio of feedstock and enriched uranium of 8.5,

• With the 'current average' ore grade of 0.15%, a current modern plant extracting energy for 45,000 kWh electricity from 1 kg, we get 0.15 kg mined material for 1 kWh.

• With the 'current average' ore grade of 0.15%, and an EPR expectation of 60,000 kWh electricity from 1 kg, we get 0.11 kg mined material for 1 kWh.

• With current peak grade of 0.05% and the EPR, we get 0.33 kg mined for 1 kWh.

• With a cutoff grade of 0.02% and the EPR, we get 0.83 kg mined for 1 kWh.

• With a 0.0004% grade granite and the EPR, we get 41.7 kg mined for 1 kWh.

_{*Lunatic*, n.
One whose delusions are out of fashion.}