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Application of Immobilisation Technologies in the Context of the Letter of Compliance Process

Integration of Nirex into NDA. CoRWM Options Review 2003-06, recommended geological disposal (July 2006)Secretary of State announcement (October 2006)Nirex shares transfer to NDA (November 2006)integration of organisations by (March 2007)Waste Management and Engineering Division (2007)

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Application of Immobilisation Technologies in the Context of the Letter of Compliance Process

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    1. Application of Immobilisation Technologies in the Context of the Letter of Compliance Process Dr Andy Harris UK Nirex Ltd

    2. Integration of Nirex into NDA CoRWM Options Review 2003-06, recommended geological disposal (July 2006) Secretary of State announcement (October 2006) Nirex shares transfer to NDA (November 2006) integration of organisations by (March 2007) Waste Management and Engineering Division (2007) ‘Site Licence Company’ (SLC) in due course (2008+)

    3. Letter of Compliance process confirm proposed packages comply with packaging standards as defined in Generic Waste Package Specification demonstrate packages are disposable under the Phased Geological Repository Concept (PGRC) and provide disposability assessment reduce risk that packages will not be acceptable for disposal in the future

    4. Current regulatory arrangements for ILW packaging

    5. Relationship to projects

    6. Letter of Compliance process

    7. LoC assessment process

    8. Endorsement endorsement of proposed waste packages via a Letter of Compliance if: all safety criteria can be met, or a case can be made that it is not necessary to meet particular criteria the proposal represents a step towards disposal and credible plans exist to remove potential compliance gaps in future

    9. Wasteform requirements immobilisation of activity appropriate mechanical properties, including response to accidents chemical compatibility stability during extended storage and predictable evolution/ageing managed gas generation compatibility with expected variability in waste

    10. Common practice (solids) solid items of waste examples include Magnox swarf, AGR cladding hulls, decommissioning wastes infiltrate with fluid cement grout simple, well-established and cost effective controlled and predictable corrosion rates provides an alkaline environment

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