Alpha radiation was detected in a sample of sludge from a drain upstream of the site on 10 July and reported to a sub-committee of the local stakeholder group on Wednesday evening. It was confirmed on Friday by the private consortium that is cleaning up Dounreay, DSRL.
According to the government watchdog, the Scottish Environment Protection Agency (Sepa), a “small quantity of radioactivity” had been found by DSRL. “The sample was taken from a manhole within a foul drain system, outwith and upstream of the Dounreay site,” said a Sepa spokeswoman.
“Following the initial notification DSRL has been undertaking subsequent analysis work to help determine the source of the radioactivity. Sepa is in regular contact with DSRL, and they will continue to update us.”