The project will see an existing above ground waste store extended to house intermediate level waste that is expected to be processed and packaged as part of the site’s clean up.
Passively safe containers will be kept in long-term storage within the facility in accordance with Scottish Government policy.
The pre-construction phase is expected to take six months while construction is scheduled for two and a half years employing around 100 people.
Leo Martin, Graham managing director – civil engineering, said: “We have already established a strong partnership with Dounreay Site Restoration Limited, stretching back to early 2011, and will once again apply our collaborative approach and technical expertise to maximise the success of this project.
“This is an important project on behalf of Dounreay Site Restoration Limited and will support the continued transformation of the Dounreay nuclear site into a safe, secure area.
DSRL Construction Director, David Hubbard, said: “It is just one of several contracts being awarded to ensure we continue to reduce hazards and make progress towards the site’s interim end stage.
“The next few years will see us construct several new facilities to support the programme as well as starting to demolish a number of redundant structures.”
Graham has a long track record at Dounreay having already successfully completed a grout plant facility and constructed two low-level waste vaults excavating of 243,000m3 of rock.