Appendix CRF - Part 3 - Northamptonshire County Council

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Radiological Assessment 0820-2 Version 2 3 Assessment Methodology This section describes the overall assessment methodology used to calculate potential doses from disposals of LLW at the ENRMF and to determine radiological capacities. Section 3.1 summarises the SNIFFER methodology, on which the assessment is based. Section 3.2 describes the changes made to the SNIFFER methodology to take account of specific features of the ENRMF and the proposed disposals. 3.1 Summary of SNIFFER methodology 3.1.1 Assessment framework The SNIFFER methodology was developed so as to provide the regulators, and other stakeholders, with a consistent approach to assessing the potential for landfill sites to accept the category of LLW known as Special Precautions Burial (SPB). The overall assessment approach is illustrated in Figure 3.1 (SNIFFER 2006a). It was originally envisaged that a screening stage would be useful if large numbers of sites were examined (SNIFFER 2006a). This might be done by site owners, seeking to put forward a few sites as potential disposal sites, or by planners, seeking to assess the overall availability of disposal capacity for LLW. The principal application of the methodology, however, would be for the assessment of particular sites and this screening stage would not be required. An important aim of the SNIFFER methodology was to provide regulators with a means of assessing radiological capacity for a landfill site and updating this capacity as more information becomes available and the available capacity is reduced though disposals. To ensure that the assessment is robust and fit for purpose, the approach developed by the IAEA and others of defining an assessment context forms an important part of the SNIFFER methodology. To provide as much consistency and flexibility as possible, the elements comprising the assessment context were incorporated as generic elements (providing consistency) or site-specific elements (providing flexibility) as considered most appropriate. Using the assessment terminology established by the IAEA, the generic aspects of the assessment context are the assessment purpose, endpoints, basis, and assumptions regarding future society. The site-specific aspects of the assessment context are the environmental system of interest, site context, nature of the wastes, and assessment timescales. The assessment endpoint and basis are established as generic factors so as to ensure as much consistency as possible between sites. The assessment end-point is dose, so that the results can be compared with an effective dose criterion. The SNIFFER methodology was based on a criterion of 20 Sv/year, representing the point at which doses arising from disposals can be regarded as being below regulatory concern (SNIFFER 2006a). Galson Sciences Limited 14 14 July 2009 WS010001/ENRMF/CONSAPP<strong>CRF</strong> 564
Radiological Assessment 0820-2 Version 2 Figure 3.1: The overall SNIFFER assessment approach (SNIFFER 2006a). General Site Information Site- Specific Data Existing Inventory Assess Mitigation Measures Screening Protocol Pass Develop Assessment Context Dose Calculations Radiological Capacity Calculations Authorisation Conditions Site Unacceptable Generic Data Dose Constraint The assessment basis, also established as a generic element, includes all of the scenarios (describing ways in which doses could be received) that should be considered in an assessment. Some scenarios may be excluded from particular assessments, but only if there is a documented reason for doing so. Scenarios are discussed in more detail below. The site context includes a range of features of the site and its surroundings that help to define the source-pathway-receptor system(s) used in the assessment calculations. These features include: Galson Sciences Limited 15 14 July 2009 Fail WS010001/ENRMF/CONSAPP<strong>CRF</strong> 565
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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 273 and 274: 4.3.2 Fire Radiological Assessment
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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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