Magnox Decommissioning Opitmisation Programme (MODP) Overview

1. Removal of Berkeley Boilers Paul Oswald (Magnox), Rachel O’Donnell (LLWR), Joe Robinson (Studsvik) Magnox Decommissioning Opitmisation Programme (MODP) Overview

2. Background • Each reactor had 8 boilers (heat exchangers) housed externally to the reactor buildings • Boilers de-lagged and disconnected during decommissioning preps • Currently stored horizontally around each reactor (15 in total) • One boiler sized reduced on site in the 1990’s

3. Background • Each boiler is 21 meters long and 5 meters in diameter • Each weighs approx. 310 tonnes • 15 boilers originally planned to be left in situ until final site clearance 2074 • Very low levels of internal contamination present • Initiated graduate project to investigate options

4. Why now? • Business case aligns with overall national Low Level Waste (LLW) strategy (published Summer 2010) • For LLW metals - BPEO is to treat/recycle • Early solutions found now, rather than at final site clearance • Provides base load for supply chain • Noticeable change to the site skyline • Remains LLW if stored to final site clearance on site, so why not do it now!

5. Graduate Project • Graduate Project – to under take initial ground work • Five work streams with mentors Waste Size Reduction Transport Characterisation and historical data Business Case

6. Project initiation and definition • Graduate Project – background work • Transportation feasibility studies completed (Studsvik & Energy Solutions) • Business case completed • Additional funding secured for Berkeley Site

7. Project initiation and definition • Early collaboration with LLWR • Optioneering undertaken to determine Best Available Technique (BAT) • LLWR framework used to engage supply chain

8. Programme • Contract award: 4thNovember 2011 • Inaugural meeting:16thNovember 2011 • Highways Agency – SpecialMovement Order approval: 12thJanuary 2012 • TFS Approval: 19thJanuary 2012 • Readiness review:28thFebruary 2012 • Lift 1stboiler: 1stMarch 2012 • Transport 1stboiler: 23rdMarch 2012 • Transport 5th boiler: 29thMarch 2012

9. Commercial – utilising LLWR Waste Services Contract Magnox Waste Services Contract LLWR Metal Waste Services Framework Nuvia EnergySolutions Studsvik

10. Project relationships Magnox LLWR Studsvik ALE Assystem COSTAIN Oceaneering Role: Engineering substantiation Role: Heavy-lift and transport contractor Role: Boiler preparations and on-site civil enabling works Role: Non-Destructive Examination

11. Scope of works for Lot 1 - Five boilers • Stakeholder Engagement • Regulatory approvals • Enabling Works • Engineering • Substantiation • Site Preparation • Lifting & Site Transport • Off site Transport • Treatment • Secondary Waste • LLW – LLWR • C14 – Magnox Ltd. • Recycled steel – Swedish market

12. Enabling works • Trans-frontier shipment application – approved • Special order – granted • Substantiation • Integral tasks that must be completed before lifting can commence

13. Stakeholder Engagement • Early introduction to SSG • Early liaison with E.A. Site Inspector • Presentation to SSG giving detail following transport feasibility study • Attendance at various public events in and around Berkeley (Berkeley Christmas Fair, Business Forum breakfast) • Continuing liaison with E.A. – close involvement in the development of the BAT • Regular presentations giving updates for Site personnel • Fortnightly project update to key stakeholders across Magnox Ltd • Presentation to SSG by the supply chain • Planned flyer drops giving detail of dates and times for vehicle movements • Key stakeholder event recognising the first Boiler being removed from site

14. Lifting and site transport • Jacking and skidding • Self propelled modular transport (SPMT)

15. Transport to Sharpness Docks • Route survey undertaken as part of the transport study. • Telephone cables • Utilities • Street furniture • Bridges/culverts • Tree trimming • Road closures

16. Shipping operations

17. Studsvik Nuclear Site Deep sea Harbour Storage and processing area

18. Temporary Storage

19. Processing

20. Secondary Waste Weight: ~ 310 tonnes Volume: ~ 600 m³

21. Processing • Size reduction • Recovery of loose material • Decontamination of internal surfaces • Smelting • Casting of ingots for free release • Melting of metal ensures robust characterisation analysis • Representative sample “pucks” • Metal is restricted release

22. Secondary Waste Management • Volume reduced waste consists of a concentrate including the radioactive nuclides to be returned • All secondary waste packages are analysed for radiological content • A comprehensive final report is generated during processing with radiological analysis data • Use of standard packages for return of secondary waste

23. Where we are currently • Phase 1 site operations and transport successfully completed • 5 Boilers in Sweden • Size Reduction underway on first boiler

24. Film The film may be viewed on the Mediasite

25. Conclusions • Cross SLC’s working in partnership to deliver decommissioning solutions • Early and open engagement with supply chain to identify possible solutions • Effective team work from all players: Magnox, LLWR and Studsvik – focused on delivery • Clear demonstration of decommissioning in progress at Berkeley

26. Questions