Berkeley and Oldbury, 2014
Total Page:16
File Type:pdf, Size:1020Kb
Cefas contract report C6028 Radiological Habits Survey: Berkeley and Oldbury, 2014 2015 Environment Report RL 02/15 This page has been intentionally left blank Cefas Document Control Radiological Habits Survey: Berkeley and Oldbury, 2014 Food Standards Agency, Environment Agency and Office for Nuclear Submitted to: Regulation Date submitted: 19/3/15 Project Manager: Fiona Clyne Report compiled by: Fiona Clyne Quality control by: John Hunt Approved by & date: Bill Camplin, 18/3/15 Version: Final Version Control History Author Date Comment Version Sent to FSA and EA Fiona Clyne 30/12/14 Draft 1 for comments. Sent to ONR for Fiona Clyne 31/1/15 Draft 1 comments. Sent to John Hunt for Fiona Clyne 4/2/15 Draft 2 comments. All amendments Fiona Clyne 19/3/15 Final completed. This page has been intentionally left blank Environment Report RL 02/15 Radiological Habits Survey: Berkeley and Oldbury, 2014 F.J. Clyne, C.J. Garrod and G.P. Papworth 2015 The work described in this report was carried out under contract to the Environment Agency and the Food Standards Agency. Cefas contract C6028 FSA Project FS131008 This report should be cited as: Clyne, F.J., Garrod, C.J. and Papworth, G.P., 2015. Radiological Habits Survey: Berkeley and Oldbury, 2014. RL 02/15. Cefas, Lowestoft A copy can be obtained by downloading from the Cefas website: www.cefas.defra.gov.uk © Crown copyright, 2015 Page 2 of 72 Radiological Habits Survey: Berkeley and Oldbury, 2014 CONTENTS SUMMARY .............................................................................................................................................. 7 1 INTRODUCTION ........................................................................................................................... 14 1.1 Regulatory framework ........................................................................................................... 14 1.2 Radiological protection framework ........................................................................................ 15 2 THE SURVEY ............................................................................................................................... 17 2.1 Site activity ............................................................................................................................ 17 2.2 Survey objectives .................................................................................................................. 17 2.3 Survey areas ......................................................................................................................... 18 Figure 1. The Berkeley and Oldbury aquatic survey area ............................................................ 19 Figure 2. The Berkeley terrestrial and direct radiation survey area .............................................. 20 Figure 3. The Oldbury terrestrial and direct radiation survey area ............................................... 21 2.4 Conduct of the survey ........................................................................................................... 22 3 METHODS FOR DATA ANALYSIS ............................................................................................. 24 3.1 Data recording and presentation ........................................................................................... 24 3.2 Data conversion .................................................................................................................... 24 3.3 Rounding and grouping of data ............................................................................................. 24 Table A. Names of age groups and range of ages within each age group ................................... 25 3.4 Approaches for the identification of high rates ...................................................................... 26 3.5 Profiles of habits survey data for use in total dose assessments ......................................... 27 3.6 Data quality ........................................................................................................................... 27 4 AQUATIC RADIATION PATHWAYS ........................................................................................... 28 4.1 Aquatic survey area .............................................................................................................. 28 Figure 4. Black Rock ..................................................................................................................... 29 Figure 5. The River Wye ............................................................................................................... 29 Figure 6. Beachley Point ............................................................................................................... 30 Figure 7. Lydney ........................................................................................................................... 31 Figure 8. Newnham....................................................................................................................... 32 Figure 9. Severn Beach ................................................................................................................ 33 Figure 10. Northwick Warth .......................................................................................................... 33 Figure 11. Aust Cliff ...................................................................................................................... 34 Figure 12. Littleton Warth ............................................................................................................. 34 Figure 13. Shepperdine ................................................................................................................ 35 Figure 14. Hock Cliff ..................................................................................................................... 36 4.2 Fisheries ................................................................................................................................ 37 4.3 Destination of seafood originating from the aquatic survey area .......................................... 37 4.4 Angling .................................................................................................................................. 38 4.5 Wildfowling ............................................................................................................................ 38 4.6 Other pathways ..................................................................................................................... 38 4.7 Food consumption data ......................................................................................................... 38 Table B. Summary of adults’ consumption rates of foods from the aquatic survey area .............. 39 Table C. Summary of children’s consumption rates of foods from the aquatic survey area ......... 40 4.8 Intertidal occupancy .............................................................................................................. 40 Table D. Summary of adults’ intertidal occupancy rates .............................................................. 41 Table E. Summary of children’s and infants’ intertidal occupancy rates ...................................... 42 4.9 Gamma dose rate measurements......................................................................................... 42 4.10 Handling of fishing gear and sediment .................................................................................. 43 Table F. Summary of adults’ handling rates of fishing gear and sediment................................... 43 4.11 Water based activities ........................................................................................................... 44 Page 3 of 72 CONTENTS 5 TERRESTRIAL RADIATION PATHWAYS .................................................................................. 45 5.1 Terrestrial survey area .......................................................................................................... 45 5.2 Destination of food originating from the terrestrial survey area ............................................ 46 5.3 The potential transfer of contamination off-site by wildlife .................................................... 47 5.4 Food consumption data ......................................................................................................... 47 Table G. Summary of adults’ consumption rates of foods from the terrestrial survey area .......... 48 Table H. Summary of children’s and infants’ consumption rates of foods from the terrestrial survey area .................................................................................................................................... 49 6 DIRECT RADIATION PATHWAYS .............................................................................................. 50 6.1 Direct radiation survey area .................................................................................................. 50 6.2 Residential activities .............................................................................................................. 50 6.3 Leisure activities .................................................................................................................... 51 6.4 Commercial activities ............................................................................................................ 51 6.5 Occupancy rates ..................................................................................................................