Plans to transport nuclear waste from Dounreay in Scotland to be stored in Cumbria have been rejected.
Waste will continue to be stored at Dounreay in shipping containers
Cumbria County Council officials visited the nuclear site at Caithness in March to discuss decommissioning and the shipping of waste to Sellafield.
But Scotland's Environment Minister Ross Finnie said the proposal by the United Kingdom Atomic Energy Authority (UKAEA) had been rejected.
The waste will continue to be stored at Dounreay in shipping containers.
Those behind the proposals had said there was no alternative to exporting the solid low grade material - estimated at a lorry-load per week - to the national waste depository at Drigg, near Sellafield.
Cumbria County Council had opposed the plans, as did Scottish ministers who directed the Scottish Environmental Protection Agency (Sepa) to reject the proposal.
The waste is caused by the decommission of the site, where waste dumps are full.
Mr Finnie said: "This decision reflects a widespread view that the best practicable environmental option for this low level waste is that it should be dealt with at Dounreay, where it is produced."
Dounreay spokesman Colin Punler said additional space would be built to accommodate the excess waste, thought to potentially be the size of 750 double-decker buses.
The containers will remain there until UKAEA can build another disposal facility at Dounreay.
New dumps are not expected to be complete for another six years.
But bosses have insisted they are confident they will eventually be able to deal with the 100,000 cubic metres of new radioactive rubbish caused by decommissioning the nuclear power plant.