Dounreay nuclear power station in Scotland. An environmental watchdog could recommend prosecuting the operator of the Dounreay nuclear plant over contamination at the facility, it emerged. The Scottish Environmental Protection Agency (Sepa) confirmed it was currently investigating the UK Atomic Energy Authority (UKAEA) with a view to taking "enforcement action". The issue is believed to centre on a partially-decommissioned acid drain on the Caithness site. 15/08/03 : The operators of a nuclear plant breached safety regulations after a number of radioactive particles were found on a nearby beach, a judge ruled. Businessman Geoffrey Minter brought the case against the UK Atomic Energy Authority (UKAEA), which runs the Dounreay plant in Caithness, northern Scotland. In his petition to the Court of Session in Edinburgh, Mr Minter claimed 22 particles had been found on his land on Sandside Beach since 1997. And the court was told a further 16 had been discovered since the first hearing in February.