Makes you wonder about the sheer amount of scrap dumped there to produce a traceable level of radiation above the background level. "Construction of a substation for a high voltage electricity cable between Orkney and the Scottish mainland has been suspended after the discovery of radioactive contamination. The facility at Dounreay, near Thurso in Caithness, forms part of energy giant SSEN's £900m Orkney-Caithness 220 kV link project. The traces of radiation are believed to be from military aircraft instruments discarded in the area during or after World War Two about 80 years ago. Dials were illuminated using a paint containing radium-226 (Ra-226) and similar contamination problems have been detected elsewhere in Scotland, including Dalgety Bay in Fife." WW2 radiation suspends Orkney-Caithness power project work - BBC News