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Radioactivity

Volume 81: debated on Wednesday 19 June 1985

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asked the Secretary of State for the Environment, pursuant to his answer to the hon. Member for Christchurch on 7 June, Official Report, columns 271–72, if he will indicate the levels of radioactivity in the following places, using as a measuring point of 100 the gamma radiation dose rates of 964 microgray per year at national grid 10 km square SX66 indicated in his answer referred to as having the highest gamma radiation dose in England and Wales; Dounreay, Windscale, Springfields, Culcheth, Culham, Harwell, Winfrith, Torness, Hunterston, Hartlepool, Heysham, Wylfa, Trawsfynydd, Sizewell, Bradwell, Dungeness, Berkeley, Oldbury and Hinkley Point.

Comparable measurements to those reported in the answer given by my hon. Friend the Member for Bristol, West (Mr. Waldegrave) on 7 June have been made throughout Great Britain by the National Radiological Protection Board. The values for the 10 km national grid squares in which the places named are situated (or neighbouring squares when this measurement is not available), expressed as a percentage of the gamma dose rate measured at national grid square SX66, are as follows:

National grid 10 km squareLocationDose rate as percentage of 964 micrograys/year
NC 96*Dounreay32
NY 00Windscale38
SD 43Springfields26
SJ 69Culcheth24
SU 59Culham23
SU 48Harwell19
SY 88Winfrith12
NT 77*Torness36
NS 15*Hunterston17
NZ 52Hartlepool36
SD 45Heysham29
SH 39Wylfa30
SH 63Trawsfynydd17
TM 46Sizewell30
TM 00Bradwell29
TR 01*Dungeness20
ST 69Berkeley32
ST 69Oldbury32
ST 24Hinkley Point40
* No values available for these grid squares, values given are based on those for neighbouring squares.