The UK nuclear archive base in Wick yesterday scooped a major industry award after becoming the 10th in Scotland to be granted Accredited Archive Status.
It is the latest accolade to come the way of the £20 million complex which opened in 2017.
The centre, which employs about 70 people, is creating a digital archive for the mass of records held at British nuclear power sites, including nearby Dounreay, over the past 70 years.
It also stores Caithness historical archives dating from the 14th century, comprising charters, minute books, correspondence, maps, photographs and plans.
Paul Lowe, Keeper of the Records of Scotland, said: “I am pleased to congratulate Nucleus on achieving Accredited Archive status.
“The scheme provides national recognition of excellence within the sector. It is greatly encouraging to see yet another Scottish archive successfully achieving the standard, in recognition of their good work.”