Cefas contract report C6028 Radiological Habits Survey: Hartlepool, 2014 2015 Environment Report RL 01/15 This page has been intentionally left blank Cefas Document Control Radiological Habits Survey: Hartlepool, 2014 Food Standards Agency, Environment Agency and Office for Nuclear Submitted to: Regulation Date submitted: 19/03/2015 Project Manager: Fiona Clyne Report compiled by: Chris Garrod Quality control by: John Hunt Approved by & date: Bill Camplin 19/03/2015 Version: Final Version Control History Author Date Comment Version Sent to FSA and EA Chris Garrod 30/12/2014 Draft 1 for comments. Sent to ONR for Chris Garrod 31/01/2015 Draft 1 comments. Revised and sent to Chris Garrod 05/02/2015 John Hunt for Draft 2 comments. All amendments Chris Garrod 19/03/2015 Final completed. This page has been intentionally left blank Environment Report RL 01/15 Radiological Habits Survey: Hartlepool, 2014 C.J. Garrod, F.J. Clyne 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: Garrod, C.J., Clyne, F.J. and Papworth, G.P., 2015. Radiological Habits Survey: Hartlepool, 2014. RL 01/15. Cefas, Lowestoft A copy can be obtained by downloading from the Cefas website: www.cefas.defra.gov.uk © Crown copyright, 2015 Page 2 of 73 Radiological Habits Survey: Hartlepool, 2014 CONTENTS SUMMARY .............................................................................................................................................. 7 1 INTRODUCTION ........................................................................................................................... 12 1.1 Regulatory framework ........................................................................................................... 12 1.2 Radiological protection framework ........................................................................................ 13 2 THE SURVEY ............................................................................................................................... 15 2.1 Site activity ............................................................................................................................ 15 2.2 Survey objectives .................................................................................................................. 15 2.3 Survey areas ......................................................................................................................... 16 Figure 1a. The Hartlepool aquatic survey area ............................................................................ 17 Figure 1b. Expanded view of the Hartlepool aquatic survey area adjacent to Hartlepool Town. 18 Figure 2. The Hartlepool terrestrial and direct radiation survey areas. ........................................ 19 2.4 Conduct of the survey ........................................................................................................... 20 3 METHODS FOR DATA ANALYSIS ............................................................................................. 22 3.1 Data recording and presentation ........................................................................................... 22 3.2 Data conversion .................................................................................................................... 22 3.3 Rounding and grouping of data ............................................................................................. 22 Table A. Names of age groups and range of ages within each age group. .................................. 23 3.4 Approaches for the identification of high rates ...................................................................... 24 3.5 Profiles of habits survey data for use in total dose assessments ......................................... 25 3.6 Data quality ........................................................................................................................... 25 4 AQUATIC RADIATION PATHWAYS ........................................................................................... 26 4.1 Aquatic survey area .............................................................................................................. 26 Figure 3. Block Sands ................................................................................................................... 27 Figure 4. Victoria Harbour ............................................................................................................. 28 Figure 5. Old Town Basin ............................................................................................................. 29 Figure 6. Seaton Sands ................................................................................................................ 30 Figure 7. East of the power station jetty ....................................................................................... 31 Figure 8. The River Tees below the tidal barrage ........................................................................ 32 Figure 9. Paddy’s Hole ................................................................................................................. 33 Figure 10. Bran Sands .................................................................................................................. 34 Figure 11. Saltburn Sands, Marske Sands and Redcar Sands .................................................... 35 4.2 Commercial fisheries ............................................................................................................. 35 4.3 Destination of seafood originating from the aquatic survey area .......................................... 36 4.4 Hobby fishing, angling and non-commercial shellfish collecting. .......................................... 36 4.5 Wildfowling ............................................................................................................................ 37 4.6 Other pathways ..................................................................................................................... 37 4.7 Food consumption data ......................................................................................................... 38 Table B. Summary of adults’ consumption rates of foods from the aquatic survey area .............. 38 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......................................................................................... 43 4.10 Handling of fishing gear and sediment .................................................................................. 43 Table F. Summary of adults’ handling rates of fishing gear and sediment................................... 44 Table G. Summary of children’s handling rates of fishing gear and sediment ............................. 44 4.11 Water based activities ........................................................................................................... 45 5 TERRESTRIAL RADIATION PATHWAYS .................................................................................. 46 5.1 Terrestrial survey area .......................................................................................................... 46 5.2 Destination of food originating from the terrestrial survey area ............................................ 47 5.3 The potential transfer of contamination off-site by wildlife .................................................... 47 Page 3 of 73 CONTENTS 5.4 Food consumption data ......................................................................................................... 47 Table H. Summary of adults’ consumption rates of foods from the terrestrial survey area ........... 48 Table I. 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 .............................................................................................................. 51 6.3 Leisure and educational activities ......................................................................................... 51 6.4 Commercial activities ............................................................................................................ 52 6.5 Occupancy rates ................................................................................................................... 52 Table J. Summary of direct radiation occupancy rates................................................................. 52 6.6 Gamma dose rate measurements......................................................................................... 53 7 USES OF HABITS