HINKLEY Point C will employ about 3,000 more workers than originally expected according to EDF Energy.
When plans were filed for the new nuclear power station in 2012 EDF predicted that up to 5,600 staff would be needed on the site.
But the company has now revised that figure to up to 8,500 when work is at its peak ahead of the planned opening in June 2026.
Nigel Cann, EDF’s programme and construction delivery director, said the company has now “honed plans” after disruption cause by the coronavirus.
He said it had lost the equivalent of three months’ work due to the pandemic and anticipates losing another three months’ worth before it ends.
Mr Cann said the company has started planning for a time “when we can start getting back to normal” and is assuming that coronavirus restrictions are lifted by the summer.
He told BBC Radio Somerset: “This project’s not just about this site. It’s about factories all across the world and they’ve obviously been impacted by the pandemic.
“We remain on track on the key milestones of the site. We hit 18 of our key 20 milestones of the year.”
EDF announced on Wednesday that the plant’s opening has been delayed and will cost about £500m more than expected.
When operational the plant is expected to generate power for about 7% of the UK’s total electricity demand.