Removal of Berkeley Boilers
Paul Oswald (Magnox), Rachel O’Donnell (LLWR), Joe
Magnox Decommissioning Opitmisation Programme (MODP)
Robinson (Studsvik)
Overview
1
Background
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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
2
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
3
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!
4
Graduate Project
• Graduate Project – to under take initial
ground work
• Five work streams with mentors
Waste
Size
Reduction
Transport
Business
Case
Characterisation and
historical data
5
Project initiation and definition
• Graduate Project – background work
• Transportation feasibility studies completed
(Studsvik & Energy Solutions)
• Business case completed
• Additional funding secured for Berkeley Site
6
Project initiation and definition
• Early collaboration with LLWR
• Optioneering undertaken to
determine Best Available Technique
(BAT)
• LLWR framework used to engage
supply chain
7
Programme
• Contract award:
• Inaugural meeting:
• Highways Agency – Special
Movement Order approval:
• TFS Approval:
• Readiness review:
• Lift 1st boiler:
• Transport 1st boiler:
• Transport 5th boiler:
4th November 2011
16th November 2011
12th January 2012
19th January 2012
28th February 2012
1st March 2012
23rd March 2012
29th March 2012
8
Commercial – utilising LLWR Waste Services Contract
Magnox
Waste Services Contract
LLWR
Metal Waste Services Framework
EnergySolutions
Nuvia
Studsvik
9
Project relationships
Magnox
LLWR
Studsvik
ALE
Role: Heavy-lift
and transport
contractor
Assystem
Role:
Engineering
substantiation
COSTAIN
Role: Boiler
preparations
and on-site civil
enabling works
Oceaneering
Role: NonDestructive
Examination
10
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
11
Enabling works
• Trans-frontier shipment application – approved
• Special order – granted
• Substantiation
• Integral tasks that must be completed before lifting can
commence
12
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
13
Lifting and site transport
• Jacking and skidding
• Self propelled modular
transport (SPMT)
14
Transport to Sharpness Docks
• Route survey undertaken
as part of the transport
study.
• Telephone cables
• Utilities
• Street furniture
• Bridges/culverts
• Tree trimming
• Road closures
15
Shipping operations
16
Studsvik Nuclear Site
Deep sea
Harbour
Storage and processing area
Temporary Storage
Processing
Secondary Waste
Volume: 13-15m3
~95%+
Volume: ~ 600 m³
Weight: ~25 tonnes
~90%+
Weight: ~ 310 tonnes
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
21
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
22
Where we are currently
• Phase 1 site operations and transport
successfully completed
• 5 Boilers in Sweden
• Size Reduction underway on first boiler
23
Film
The film may be viewed on the Mediasite
24
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
25
Questions
26