12 TWh
To answer tyromaniac's question that is dead and therefore I can't reply to: The United States utility companies bill by the kWh, so American-centric news will report in multiples of that unit.
And as a sidenote, why do people downvote a question rather than answer it? Some of us like answering questions and deadening a question removes that ability.
Or 12 trillion nuclear power plants with a capacity of 1 Wh each
Also about 16 GW. They don't say what the installed capacity is but average midday generation is 40 GW for usage of 40% which is not bad.