Research discovers high levels of radioactive radon gas

HIGH levels of radioactive radon gas have been found in parts of Ireland where low levels had been predicted, according to research to be released tomorrow.

The study is part of an ongoing national radon measurement programme being carried out by the Radiological Protection Institute of Ireland. Details of radon samples from 14 counties with a concentration of samples from Leinster are included in the research.

It is understood that a number of samples show levels approach or exceed the national guideline limits for radon in homes. The RPII recommends corrective action be taken in homes where radon levels exceed this limit.

The RPII is also expected to reveal that only one in 10 house holders in areas where action should be taken have bothered to do so. Longterm exposure to radon increases the risk of lung cancer, particularly for smokers.

High levels had been predicted and found in Wicklow and Done gal, where there is much underlying granite rock. Radon is often associated with this rock as it can contain traces of uranium which is the source of the gas.

Several sample sites in Co Wexford without this association have however, shown comparatively high radon levels. A number of other locations are also under stood to have shown higher than expected levels.

The national radon survey has already identified a number of areas with high radon including parts of counties Galway, Clare and Louth. These findings underline the need for continued sampling as any area could have high radon levels.

Radon is an odourless, colourless radioactive gas that seeps from the ground. It disperses in the open but can collect under sub floors and empty spaces under buildings, ultimately penetrating living areas.

The gas causes little damage but it decays into radioactive particles that can lodge in the lungs, causing minute but longterm damage to tissues which can lead to cancer.

Radon surveys were initiated here by Dr James McLaughlin of UCD in the mid 1980s. His early work showed there were a number of radon "hot spots" in Clare and Galway. Since then the Nuclear Energy Board, which later became the RPII, conducted surveys to assess radon levels.

In April, the Minister of State at the Department of Transport, Energy and communications, Mr Emmet Stagg, announced a grant scheme covering half the cost of remedial work to reduce radon levels.

The grant scheme, which has an £800 limit per dwelling, begins in January 1998. Mr Stagg also announced a free radon survey for householders in high radon areas, to begin in 1999.

Householders outside such areas can arrange an RPII test for a small fee.