Radiological Habits Survey: Torness 2016 Public Report 1 2 Radiological Habits Survey: Torness 2016 Authors and Contributors: I. Dale, P. Smith, A. Tyler, A. Watterson, D. Copplestone, A. Varley, S. Bradley, L. Evans, P Bartie, M. Clarke, M. Blake, P. Hunter and R. Jepson External Reviewer: A. Elliott i Environmental Radioactivity Laboratory & Occupational and Environmental Health Group Contents Contents .................................................................................................................................................. ii List of abbreviations and definitions ...................................................................................................... vi Units ....................................................................................................................................................... vi Summary ............................................................................................................................................... vii 1. Introduction .................................................................................................................................... 1 1.1 Regulatory Context ................................................................................................................. 1 1.2 Definition of the Representative Person ................................................................................ 2 1.3 Dose Limits and Constraints .................................................................................................... 2 1.4 Habits Survey Aim ................................................................................................................... 3 2. The Survey ....................................................................................................................................... 5 2.1 Introduction ............................................................................................................................ 5 2.2 Site Activity ............................................................................................................................. 5 2.2.1 Onsite activity ................................................................................................................. 5 2.2.2 Offsite changes ................................................................................................................ 6 2.3 Estimated Activity Concentrations from Licensed Discharges from Torness Power Station. 6 2.4 Survey Areas............................................................................................................................ 9 2.5 Land Cover Data ...................................................................................................................... 9 2.6 Soil Data ................................................................................................................................ 14 2.7 Topographic Wetness Index ................................................................................................. 15 2.8 Agricultural Production ......................................................................................................... 15 3. Methods ........................................................................................................................................ 19 3.1 Introduction .......................................................................................................................... 19 3.2 Postal Survey ......................................................................................................................... 19 3.3 Radiometric Surveys ............................................................................................................. 19 3.3.1 In Situ Dosimetry ........................................................................................................... 20 3.3.2 Beta Dosimetry.............................................................................................................. 20 3.4 Sampling ................................................................................................................................ 20 3.5 GPS Tracking .......................................................................................................................... 20 3.6 Conduct of the Survey ........................................................................................................... 21 3.7 Meetings and Informal Contacts ........................................................................................... 21 3.8 Data Conversion .................................................................................................................... 22 3.9 Data Rounding and Grouping ................................................................................................ 22 3.10 Qualitative and Quantitative Observations .......................................................................... 24 3.11 Dose Assessment Tool .......................................................................................................... 24 ii 4. Postal Survey ................................................................................................................................. 27 4.1 Introduction .......................................................................................................................... 27 5. Postal Survey ................................................................................................................................. 29 5.1 Introduction ................................................................................................................................ 29 5.2 Aquatic Survey Area Descriptions ......................................................................................... 29 5.3 Commercial seafood operations ........................................................................................... 29 5.4 Non-commercial fishing and angling .................................................................................... 31 5.5 Wildfowling ........................................................................................................................... 32 5.6 Royal National Lifeboat Institute .......................................................................................... 33 5.7 Rowing .................................................................................................................................. 33 5.8 Professional Dog Walkers ..................................................................................................... 34 5.9 Ramblers/walking ................................................................................................................. 34 5.10 Animals Grazing .................................................................................................................... 34 5.11 Other Pathways ..................................................................................................................... 34 5.12 Seaweed and Foraging .......................................................................................................... 35 5.13 Internal Exposure .................................................................................................................. 36 5.13.1 Adults’ Consumption Rates ........................................................................................... 36 5.13.2 Children and Infant Consumption Rates ....................................................................... 39 5.14 External Exposure ................................................................................................................. 40 6. Terrestrial Radiation Pathways ..................................................................................................... 45 6.1 Introduction .......................................................................................................................... 45 6.2 Terrestrial Survey Area Descriptions .................................................................................... 45 6.3 Private Food Production ....................................................................................................... 45 6.4 Commercial Food Production ............................................................................................... 46 6.5 Wild Foods ............................................................................................................................ 46 6.6 Production of Honey ............................................................................................................. 47 6.7 Farms ..................................................................................................................................... 48 6.8 Other pathways ..................................................................................................................... 48 6.9 GPS Survey Results ................................................................................................................ 49 6.10 Internal Exposure .................................................................................................................. 49 6.10.1 Internal Exposure Adult Consumption Rate ................................................................. 49 6.10.2 Children and Infant’s Consumption Rates .................................................................... 52 7. Direct Radiation Exposure............................................................................................................