US energy production was 4 Trillion kW/h in 2005. (4 000GigaW/H)
https://www.cia.gov/library/publications/the-world-factbook/print/us.html
An Advanced CANDU reactor, chosen because it is Canadian made :), produces 1.2 GigaW/H
http://en.wikipedia.org/wiki/Advanced_CANDU_Reactor
So it would take 3 333 CANDU reactors to meet 2005 production.







