Options for dealing with radioactive particles from the Dounreay nuclear plant in Caithness are to be put forward to the public.
Radioactive particles have been traced in the sea and on beaches
The particles have been discovered on the seabed and beaches near Dounreay over the past two decades.
Site operators, the United Kingdom Atomic Energy Authority, are holding a public exhibition ahead of putting forward plans in the autumn of 2006.
The events will take place in Thurso and Wick over the next week.
A UKAEA spokesman said: "The exhibitions reflect the results of recent research and monitoring costing in the region of £10m.
"The outcome of this will help to determine if there is a better strategy than the current approach, which is to monitor local beaches and remove those particles that can be detected."
More than 50 particles have been found on Sandside public beach in Caithness since monitoring of the area began.
Options being put forward range from doing nothing to spending billions of pounds dredging the entire seabed.
The technical feasibility, environmental impact and cost of each option will be examined.