At 0735hrs this morning, Saturday May 19th, the Dounreay site alert activated for a period of 20 – 30 seconds.
Initial investigations have identified a fault with an alarm system narrowed down to a specific area of site and further testing is being carried out.
As a precautionary measure all radiological high hazard work has been temporarily suspended while investigations continue.
Site personnel and near neighbours have been notified and updated.
A Dounreay investigation into the cause of the fault will be launched.