The brief, which was acquired through GPC's north American network and was not subject to a pitch, will see GPC monitoring the government Energy Review, which is examining the future of nuclear power in the UK and is due to announce its conclusions at the end of the year.
According to Andrew Lappin, GPC senior policy adviser, if the review favours building new reactors or power stations, the projects would not start for seven or eight years.
It would then be a case of ensuring that AECL, which makes advanced CANDU reactors, would be seen as a potential contractor.
AECL has built reactors in Romania, China and South Korea. It claims a generation of western European plants built 25 to 30 years ago are coming to the end of their lives and may need replacing.
The account, run on a one-year rolling basis, will be headed by agency MD Kevin Bell.