HC Deb 23 May 1986 vol 98 c349W
Mr. Gareth Wardell

asked the Secretary of State for Wales when he expects the report on facilities for radiotherapy treatment for carcinoma of the cervix to be available.

Mr. Mark Robinson

A review of the provision of radiotherapy treatment in South Wales is presently being undertaken and I expect to have the results within the next three months.

Iodine 131 Caesium 137
Date Trawsfynydd Wylfa Trawsfynydd Wylfa
May 3 2,845 552 220
May 4 1,533 57 128
May 5 112 * 25 *
May 6 52 * <13 *
May 7 * * * *
May 8 20 * <7 *
May 9 15 95 <17
May 10 9 <11
May 11 <7 * <10 *
May 12 <8 <;7
May 13 * * * *
May 14 * * * *
May 15 <7 <9

The normal background levels for the sum of these radionuclides are less than 1 becquerel per litre. The following concentrations (initial ones measured following the incident measured in Bq L -1) are those at which substitution of drinking water supply would be required to avoid receiving doses in excess of either the annual effective dose limit of 5 millisieverts or 50 millisieverts to an individual organ were the water to be drunk for the appropriate period of time:—