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The one gigawatt facility is being constructed in two phases with the first due to be operational later this year.

Trydan Gwyrdd Cymru, based in Merthyr Tydfil, has been asked to deliver a gigawatt's worth of extra green power capacity in Wales by 2040, enough to meet the needs of more than 860,000 homes.

“If you take all methods of generating energy — whether it's wind, solar, gas, coal, everything — and if you want to look at deaths per gigawatt hour, nuclear beats out everything. It is the safest form of energy already. So that’s a good way to start.”

A gigawatt of solar is enough to supply the energy needs of about 320,000 Chinese households for a year, Gao said.

Shares in Dominion Energy rose last week after the company said it expected to supply 15 new data centers this year, some requiring a gigawatt or more of electricity.