2/2. How can you stop radioactive particles washing up on a beach in the far north of Scotland? That's just one of the problems faced by the scientists and engineers who are decommissioning three nuclear reactors at Dounreay.
How do you dismantle an experimental nuclear reactor? For the first time, scientists and engineers at Dounreay, in the north of Scotland, explain the complexity of nuclear decommissioning problems, and the political and commercial pressure they're under to work faster and cheaper.
With decommissioning soon open to competition and overseas firms looking to seize the work, Dounreay has to prove it will not suffer the safety problems of Railtrack. Reporter Simon Willis explores the science behind dismantling a complex atomic site in an increasingly harsh commercial climate.