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Nuclear Decommissioning Engineering Challenges Worldwide

Explore the complexities of nuclear decommissioning, issues, and solutions. Dive into the global landscape and strategies for safer practices. Presented at the University of Manchester by Professor Bernard Kelly FREng.

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Nuclear Decommissioning Engineering Challenges Worldwide

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  1. School of MACEPresentation to EdF26 March 2008 Nuclear Decommissioning Engineering at The University of Manchester Professor Bernard Kelly FREng

  2. SCALE AND CONTEXT • 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!

  3. 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

  4. Decommissioning Seven • Facility Design (Architectural and Structural) • System Design • Materials Design • Operational Design • Site factors • Decommissioning Techniques - Today and Tomorrow • Decommissioning Waste Source: Dr. Jas Devgun, Sargent & Lundy LLC

  5. Decommissioning SevenSystem 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

  6. Advantages – Eventual Decommissioning Source: Information from Westinghouse and BNFL Source: Dr. Jas Devgun, Sargent & Lundy LLC

  7. Prof. Kelly Lecturer 2 Lecturer 1 Lecturer 3 PDRA 1 PDRA 2 PDRA 3 PhD 1 PhD 2 PhD 3 PhD 7 PhD 8 PhD 9 Modelling & Policy Mechanical PhD 4 PhD 6 PhD 5 Civil Organisation

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