Transcript 26.03.08_EdF_Presentation-B-Kelly.ppt

School of MACE
Presentation to EdF
26 March 2008
Nuclear Decommissioning
Engineering at The
University of Manchester
Professor Bernard Kelly FREng
SCALE AND CONTEXT
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In UK £54bn (Sellafield 70%)
Global £300bn – consider reactors alone –
400 power reactors plus
700 research reactors (50% > 25 yrs old)
Chem plant d/c involves alpha
100 years so KM crucial – 3 generations’ learning!
Incomplete (“glorious failure”) and ageing tacit
knowledge
• Skills applicable to “hazard reduction in a hostile
environment” so oil, chemical opportunities BUT
• Distress purchase so cannot be delayed!
D&D Snapshot
(& Alternatives, Issues and Challenges)
• Worldwide
– 115 power and research reactors shut down in D&D
or entering D&D
• U.S.
– 24 decommissioned or undergoing D&D
• Funds
– Est. cost for all reactors in the U.S. Fleet: $40.7
billion
– $30.9 billion collected by end of 2004
• DECON, SAFSTOR, ENTOMB
Source: Dr. Jas Devgun, Sargent & Lundy LLC
Decommissioning Seven
1.
2.
3.
4.
5.
6.
Facility Design (Architectural and Structural)
System Design
Materials Design
Operational Design
Site factors
Decommissioning Techniques - Today and
Tomorrow
7. Decommissioning Waste
Source: Dr. Jas Devgun, Sargent & Lundy LLC
Decommissioning Seven
System design
• Reduction in the system components
• More reliance on passive safety systems
• Use of contained systems (thus, minimizing the potential for cross
contamination)
• Modular design of systems
• Designs to allow easier segmentation during decommissioning to
reduce worker exposure
• Better designs of piping systems, HVAC systems, and sumps and
drains
• Minimize potential traps for radioactive contaminants
• Decommissioning phase power requirements
Source: Dr. Jas Devgun, Sargent & Lundy LLC
Advantages – Eventual
Decommissioning
Source: Information from Westinghouse and BNFL
Source: Dr. Jas Devgun, Sargent & Lundy LLC
Organisation
Prof. Kelly
PhD 1
Lecturer 1
Lecturer 2
Lecturer 3
PDRA 1
PDRA 2
PDRA 3
PhD 2
Modelling &
Policy
PhD 3
PhD 7
PhD 4
PhD 5
Civil
PhD 6
PhD 8
Mechanical
PhD 9