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Volume 164: debated on Monday 18 December 1989

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To ask the Secretary of State for Wales (1) whether he has assessed the public radiation exposure of people who live close to the area immediately around the Trawsfynydd nuclear power station; and if he will make a statement;(2) whether he will conduct an aerial radioactivity survey of the whole of north Wales; and if he will make a statement;(3) whether he will undertake a detailed radiological assessment of public exposure to radioactivity in the area immediately around Trawsfynydd nuclear power station; and if he will make a statement.

Earlier this year, as part of a research project for the Welsh Office, whole body monitoring of volunteers from north Wales (including some from the vicinity of Trawsfynydd) took place at Ysbyty Gwynedd. This was a follow up to an exercise which took place in October 1987.The preliminary results of this monitoring have shown the levels of radioactivity present in the body to be low and in fact, to have fallen significantly in comparison with the earlier measurements. As such they present no cause for concern. The individuals who took part in this survey have been made aware of the results of the tests.

Additionally, the aquatic environment monitoring report No. 21 prepared by the Ministry of Agriculture, Fisheries and Food, a copy of which is in the Library of the House, showed that in 1988 the most highly exposed group around the Trawsfynydd nuclear power station received only 7 per cent. of the internationally recommended dose limit of 1 millisievert per year.

Consideration has been given to a detailed aerial survey of the areas of north Wales where restrictions on the movement of sheep remain in force. It is felt unlikely that such a survey would add significantly to the data already held on levels of radioactivity in sheep, soil and vegetation in those areas.