Annual Report for 2010/11 and Forward Programme - Sellafield Ltd

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SSEM/2011/4730 June 2011The potential for wind-blown transport and for very small radioactive particles to becomesuspended has been the subject of continued discussion and particle inhalation has beenconsidered by the Health Protection Agency in their risk assessment. Further discussions areto be held between SL, Environment Agency and the Health Protection Agency as part of apackage of supplementary work that HPA have been asked to do by the EA (discussedfurther in Section 5). During 2010 Nuvia began operating air sampling equipment duringparticle recovery operations on the beaches. This was introduced as a precautionarymeasure as part of the response to an investigation into the possibility for particle intake bybeach monitoring personnel (discussed further in Section 5). The results from the airsampling and the completed investigation show no evidence for airborne radioactive particlesor their inhalation. Air sampling during particle recovery operations has now become routine.3.4 Monitoring R&D: Evaluation of Airborne Gamma SpectrometryA key piece of ongoing R&D work that has continued through 2010/11 has been themodelling of gamma spectrometry systems, undertaken by the Scottish UniversitiesEnvironmental Research Centre. Previous modelling had indicated that the AirborneGamma Spectrometry (AGS) operated using helicopter, might be capable of detectingSellafield radioactive particles in the environment. This work has been further developedusing data from the Nuvia beach monitoring operations, in order to simulate detection ofSellafield particles on local beaches, taking account of the typical background activity levelsthat are observed.This work required an extension to the original contract. The issued report was submitted toSL in June 2011 and is included in the submission package to EA with this report. Forinformation, SL note the following extracts from the report. © Nuclear Decommissioning Authority 2011. 73
SSEM/2011/4730 June 2011The findings from this latest modelling work will need to be discussed with the EnvironmentAgency to determine any need for further work. Based on the reported detection capabilities;the need to post-process survey data; and the issues related to use of a low-flying helicopterover public beaches; the continued use of the Softrak Synergy system to achieve large areabeach monitoring, appears to remain justified.© Nuclear Decommissioning Authority 2011. 74
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Particles in the EnvironmentAnnual
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SSEM/2011/4730 June 2011ContentsPur
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SSEM/2011/4730 June 2011List of Tab
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SSEM/2011/4730 June 20111. Introduc
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SSEM/2011/4730 June 2011Figure 2.1.
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SSEM/2011/4730 June 2011In August 2
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SSEM/2011/4730 June 20112.3.4 Find
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SSEM/2011/4730 June 2011as well as
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SSEM/2011/4730 June 2011The monitor
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SSEM/2011/4730 June 2011(Field Inst
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SSEM/2011/4730 June 2011Figure 3.2.
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Page 25 and 26: SSEM/2011/4730 June 2011number of f
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Page 29 and 30: SSEM/2011/4730 June 2011Table 3.5.
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Page 35 and 36: SSEM/2011/4730 June 2011presence of
Page 37 and 38: SSEM/2011/4730 June 2011Beta-rich A
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Page 41 and 42: SSEM/2011/4730 June 2011Log Am241 A
Page 43 and 44: SSEM/2011/4730 June 2011Beach Find
Page 45 and 46: SSEM/2011/4730 June 2011Log Pu239 A
Page 47 and 48: SSEM/2011/4730 June 2011Figure 3.22
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Page 53 and 54: SSEM/2011/4730 June 2011In summary,
Page 55 and 56: SSEM/2011/4730 June 2011particles h
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Page 61 and 62: SSEM/2011/4730 June 2011Recommendat
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Page 65 and 66: SSEM/2011/4730 June 2011homogeneous
Page 67 and 68: SSEM/2011/4730 June 2011[the Sellaf
Page 69 and 70: SSEM/2011/4730 June 2011Figure 3.33
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Page 81 and 82: SSEM/2011/4730 June 2011The numbers
Page 83 and 84: SSEM/2011/4730 June 2011wear gloves
Page 85 and 86: SSEM/2011/4730 June 20116. Aims and
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Page 89 and 90: SSEM/2011/4730 June 20116.5 Primary
Page 91 and 92: SSEM/2011/4730 June 20113. Where ar
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Page 95 and 96: SSEM/2011/4730 June 2011Fundamental
Page 97 and 98: SSEM/2011/4730 June 2011size and wi
Page 99 and 100: SSEM/2011/4730 June 201130 May Drig
Page 105 and 106: SSEM/2011/4730 June 20117.2 Applica
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Page 109 and 110: SSEM/2011/4730 June 20117.3.2 DSRL
Page 111 and 112: SSEM/2011/4730 June 2011contract mo
Page 115 and 116: SSEM/2011/4730 June 2011From 2008/0
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Page 123 and 124: SSEM/2011/4730 June 2011Hackney PD,
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SSEM/2011/4730 June 2011Appendix 12
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Harrington monitoring extent and as
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Whitehaven North/Harbour monitoring
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Nethertown monitoring extent for 20
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Drigg monitoring extent and associa
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Contents1. Introduction ...........
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Figure 1 - Swath bathymetry of Scro
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Figures 4 to 6 show the same data w
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3.2 Options for acquiring new bathy
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3.3 Interpretation of gross geomorp
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Head, shows a marked northerly sedi
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of artefacts affecting the original
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Executive Summary
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Table of contents1 Introduction ...
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sinks and transport pathways of rad
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m thick ‘bins’ s
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‘direction to’, and the convent
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Bed shear stress exceedance - Sella
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Soulsby, R.L. and Whitehouse, R.J.S
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About usCefas is a multi-disciplina
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SummaryThe response of large volume
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Contents1. INTRODUCTION ...........
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Figure 3.15: 137 Cs activity concen
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2. MODEL PARAMETERISATIONThe approa
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Figure 2.2: Stripped 137 Cs count r
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200150Number of finds1005000 5 10 1
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1000 Bq kg -1SignificanceSignifican
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SignificanceSignificanceSignificanc
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0 Bq kg -1SignificanceSignificanceS
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40 Bq kg -13Significance21012.5 Bq
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3.1.2.2 Detailed Small Area SurveyF
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3.2 Patches of Enhanced 137 Cs acti
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3020Stripped cps100-100 200 400 600
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4. DISCUSSIONThe work reported here
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distribution. There appears to be n
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clearance reduce detection limits,
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Appendix A: Location and Activity D
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Position (BNG)Activity of recovered
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11/09/2007 301521 503408 6 Sand 195
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14/11/2007 301442 503457 4 Sand 255
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10/01/2008 301694 503522 12 Sand 27
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24/06/2008 301662 503500 4 Sand 263
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27/10/2008 302058 503065 5 Sand 128
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16/01/2009 301522 503320 7 Sand 367
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22/09/2009 301787 503592 7 Pebbles
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17/03/2010 301446 503542 2 Sand 26
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31/08/2010 300219 505597 0 Sand 33
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24/05/2010 299805 505799 3 Sand 30
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Activity of recoveredPosition (BNG)
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Page 2 of 3provides useful informat
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Week StartingSoftrak Beach Monitori
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Additional justification of 2011/12
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In the context of the total monitor
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Annual Report for 2010/11 and Forward Programme - Sellafield Ltd

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