Japan radiation 'causes no concern'
Extremely small levels of radiation over Ireland from the tsunami-hit Fukushima nuclear power plant pose no health threat, authorities have said.
Highly sophisticated detection equipment in Dublin has found radioactive iodine in the atmosphere known to have come from the stricken Japanese reactor.
David Dawson, of the Radiological Protection Institute of Ireland (RPII), said the amount discovered was so small it would have no impact on Ireland.
"It has no health concerns whatsoever at the levels that have been found," he said.
The RPII said 20 micro becquerels of the radioactive iodine had been picked up on its high volume air sampler.
Mr Dawson said the levels would have to be in excess of thousands of becquerels to spark concerns over public health.
The RPII has increased its tests of the air and rainwater for radioactivity from monthly to daily since the Japanese earthquake.
Mr Dawson said radioactivity was dispersing from Japan across the northern hemisphere and was diluting as it migrated eastwards around the globe.
The levels detected in Ireland were consistent with those reported in the UK, Italy, Spain, France, Sweden, Norway and Germany, he said.
Mr Dawson added that levels may rise but stressed there were no health concerns in Ireland from the fall-out for the immediate future.