Workers have made the case at Westminster for a replacement power station at Chapelcross near Annan.
Workers say there is a strong case for Chapelcross 2
They were part of a national lobby to press the government to invest in a new generation of atomic power production.
The workers held a rally and then met with MPs to highlight their call for nuclear to be part of energy policy.
Chapelcross is currently being decommissioned but the workers' delegation said there was a strong case for a new plant on the same site.
Shop steward John Rogerson led the Annan delegation to London.
"It is very important because we have got to get our MPs on board," he said.
Workers also intend to launch a petition both locally and nationally to gather support for a new nuclear station.
"We are looking for Chapelcross 2 here," said Mr Rogerson.
"We have got a very skilled workforce, we are close to the national grid and we have got the support of the local community."