Appendix CRF - Part 3 - Northamptonshire County Council

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Radiological Assessment 0820-2 Version 2 4.2.2 Unsaturated zone characteristics Water levels records from monitoring boreholes at the site indicate fluctuation in groundwater levels in the range of approximately 3 m to 7 m below the base of Cells 1 and 2 (HRA, p. 40). Although, given the uncertainties in the dataset, it is possible for the unsaturated zone to be no more than 3 m thick across the entire site, it is considered that assuming this minimum thickness would be overly conservative. For the purpose of the assessment the mean value, 5.5 m, of the range of values reported has been used. The unsaturated zone is modelled together with the geological barrier as a single unit (see Section 4.1). The approach adopted ignores any dispersion effects in the unsaturated zone. 4.2.3 Saturated zone characteristics The thickness of the saturated zone across the base of the landfill site can be derived from the estimates for the thickness of the Lincolnshire Limestone and that of its unsaturated zone. As mentioned above, the latter is in the range of 3-7 m and the former in the range of 15-20 m, suggesting a thickness for the saturated zone in the range of 7-17 m, with a mean value of 12 m. (Note that the Environmental Statement suggests a thickness for this layer of approximately 7-18 m.) There is uncertainty on the range of hydraulic conductivity values for the Lower Lincolnshire Limestone formation (saturated zone) underneath the landfill site. Values reported in 1998 suggest a hydraulic conductivity of 0.01 to 0.1 m/day (Environmental Statement, p. 44), whereas the results of the most recent slug tests indicate hydraulic conductivity in the range of 1 to 7 m/day (HRA, p. 38). The assessment uses a mean value derived from the more recent findings. The permeability and transmissivity of the Lincolnshire Limestone are mainly due to fractures and, as such, the fracture porosity of this formation is used as the effective porosity in the assessment. Parameter values assumed for the saturated zone are presented in Table 4.4. Galson Sciences Limited 36 14 July 2009 WS010001/ENRMF/CONSAPP<strong>CRF</strong> 586
Radiological Assessment 0820-2 Version 2 Parameter Value Rationale Reference Thickness 12 m Calculated mean value The Lincolnshire Limestone formation is 15-20 thick, with an unsaturated zone thickness of 3-7 m – HRA, pp 34 and 40 Hydraulic conductivity 4.63×10 -5 m/s Calculated mean value Minimum (1 m/day) and maximum (7 m/day) values derived from slug tests – HRA, p 38 Hydraulic gradient 0.0025 Calculated mean value 0.002 - 0.003 – HRA, p 41 Porosity 0.007 Calculated mean value 0.004 – 0.01 – HRA, p 107 Density 2000 kg/m 3 Estimated density for sedimentary rock Table 4.4 Properties of saturated zone. 4.2.4 Groundwater discharges Estimated density for sedimentary rock – HRA, p 108 Local groundwater level contours at the landfill site indicate that groundwater flows approximately southwards to south-eastwards (HRA, p. 41). Hence, for assessment purposes, only groundwater abstractions south to south-easterly of the landfill site are considered. The nearest such active licensed groundwater abstraction point is at Law’s Lawn, 1487 m south-east of the site – the water is abstracted from the confined aquifer under artesian conditions and is used solely for agricultural purposes (Environmental Statement, p 48) - Table 4.5. Parameter Value Rationale Reference Distance to nearest groundwater abstraction point Abstracted water usage Table 4.5 Groundwater abstraction. 4.2.5 Stream and river characteristics 1487 m Exact value Groundwater is abstracted at Law's Lawn (1,487 m south-east of the site) for agricultural usage Irrigation Assumed sub-activity under agricultural usage Livestock Assumed sub-activity under agricultural usage As above As above There are no natural surface water features on, and no known springs in the vicinity of, the site. The nearest spring is about 1 km south-east of the site, but no further data are available. The nearest natural surface water course is the River Welland, approximately 2.5 km to the west of the site – only data on water quality are available Galson Sciences Limited 37 14 July 2009 WS010001/ENRMF/CONSAPP<strong>CRF</strong> 587
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AUGEAN PLC EAST NORTHANTS RESOURCE
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Preface This authorisation applicat
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Wound Exposure 8.5 Pre-Closure - no
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Summary Introduction S1 This docume
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Radioactivity & Risk S12 This summa
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The LLW Disposal Proposal S24 The a
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Key Facts Summary Operational Legal
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S32 The actual capacity of the land
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S40 What are the impacts of transpo
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Annex to the Summary: What is Radio
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How Does Radiation Interact with th
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Supporting Information for the Appl
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2.0 Authorisation 2.1 Background 2.
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management option will allow curren
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Objective/Principle/Requirement fro
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3.1.3 The HPA have recently issued
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Hazardous waste landfills receive w
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easonable attempts have been made t
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3.6.6 This application document doe
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3.10.7 The new regulations to trans
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4.2 Business Plans and Site Develop
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upper bound on the region of dose o
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proposed that if the waste has an u
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y the authorisations for transfer i
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5.4.9 Each package or self-similar
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5.6 Disposal, Waste Emplacement, Co
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package and additional shielding (f
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6.0 Waste Disposal History 6.0.1 Th
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8.0 Radioactive Waste Disposal Cons
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Scenario Annual Dose Criteria Publi
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8.1.9 Additional ALARA precautions
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8.3 Pre-Closure - not expected to o
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Doses from Dropped Load Scenario In
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- The crater size can be estimated
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8.5 Pre-Closure - not expected to o
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Nuclide Maximum Leachate Authorisat
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8.9 Post-Closure - expected to occu
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8.10 Post-Closure - expected to occ
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Groundwater Pathway, Site Boundary
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Intrusion (Table 5.3, Annex B) "Int
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Intrusion (Table 5.3, Annex B) "Res
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8.15 Results of the Assessment Scen
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8.16 Landfill Radiological Capacity
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Radiological Capacity (MBq) (0.02 m
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8.16.5 The likely conclusion is tha
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With the additional constraint that
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Limit values are prescribed for cer
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nuclides (including appropriate dau
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10.0 BPEO Assessment for Disposal o
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the Environmental Permitting Regula
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12.0 Landfill Engineering and BAT F
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13.0 Waste Hierarchy and Waste Mini
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ECOLOGY and NATURE CONSERVATION Woo
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15.2 Augean’s Core Business Value
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15.5 Augean Organisation Group Tech
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CPR 04 Off loading of palletised wa
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15.7 Arrangements Specific to LLW D
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17.0 The Application Forms 17.1 Was
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References 1 Process and Informatio
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Figures Application for disposal of
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WS010001/ENRMF/CONSAPPCRF 439
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analysis, sensitivity. A quantitati
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closure. Administrative and technic
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dose. A measure of the energy depos
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HPA (NRPB) The Health Protection Ag
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model. A representation of a system
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adioactive material. Material desig
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safety culture. The assembly of cha
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uranium, enriched. Uranium containi
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Annexes A Radiation, People and the
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the
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Page 217 and 218: WS010001/ENRMF/CONSAPPCRF 535
Page 227 and 228: Radiological Assessment for Disposa
Page 229 and 230: Radiological Assessment 0820-2 Vers
Page 267: Radiological Assessment 0820-2 Vers
Page 273 and 274: 4.3.2 Fire Radiological Assessment
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Radiological Assessment 0820-2 Vers
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Radiological Assessment 0820-2 Vers
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Annex C ENRMF, IRRs 1999, Radiation
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2 VERSION 3, 14 July 2009 year, and
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2 RADIATION RISKS FROM NORMAL OPERA
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6 VERSION 3, 14 July 2009 Thus, dus
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8 VERSION 3, 14 July 2009 protectio
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10 VERSION 3, 14 July 2009 Access t
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12 VERSION 3, 14 July 2009 clean an
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APPENDIX TO ENRMF RISK ASSESSMENT 1
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Radionuclide Dose coefficient (Sv/B
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Technical Services Group NOT PROTEC
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1 INTRODUCTION NOT PROTECTIVELY MAR
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NOT PROTECTIVELY MARKED Figure 3: D
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4 REFERENCES NOT PROTECTIVELY MARKE
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Annex F Application Form WS010001/E
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Contents A For Office Use B Company
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East Northamptonshire Council Count
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E Type of Application E1 When would
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13.2 Illumination - Use of radiolum
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Please note that Environment Agency
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H6 How do you intend to measure or
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I13 What is the total monthly volum
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J Organic Liquid Waste Accumulation
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Transfer to a contractor Please pro
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Disposal of very low level solid wa
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1 0 Solid waste continued L14 How d
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L29 What is the maximum annual disp
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M2 Do you wish to have the standard
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*Note - These terms are explained i
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Documentary evidence of measures ta
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E-mail S18 What is the address of t
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Please give the county council unle
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Example Capacity Calculation Layout
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Annex H Calculation of dose rate at
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NOT PROTECTIVELY MARKED Table of Co
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NOT PROTECTIVELY MARKED 2.3 MicroSh
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3.3 Covering soil material thicknes
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NOT PROTECTIVELY MARKED APPENDIX A
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Report Determination of 238 U, 235
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Job reference number GAU1278 (Final
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3 H Job reference number GAU1278 (F
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Job reference number GAU1278 (Final
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Annex J Capability Statements WS010
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Peter Shaw Job Title - Group Leader
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Galson Sciences Limited July 2009 D
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1987 - 2005: Director of Environmen
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Appendix CRF - Part 3 - Northamptonshire County Council

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