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11 March, 2010
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Published: 01 August, 2007
SIR – In the interests of accuracy and for comparison purposes may I respectfully correct your recent report on particles of radioactive waste now declared found this year on the public beach outwith Dounreay's sister reprocessing plant, at Sellafield in England.
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It would appear that the radioactivity level is wrongly quoted. The highest activity Caesium 137 particle on the much larger beaches near Sellafield (Cs 137 is a component of the Sandside particles) has an activity of 130,000 Bq and not 1300 Bq as in your report. For comparison, the highest activity Caesium 137 particle officially declared at Sandside so far is 500,000 Bq. Also of interest is that it seems that only approximately five per cent of the public beaches near Sellafield have been surveyed by the same means (one of the groundhogs that have been in use in Caithness). Geoffrey Minter, Sandside House, Reay. 
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