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The role of technological innovation for dry storage of used nuclear fuel. H.Issard – June 2010. Summary. The innovation mandate Mission & Objectives Key performances Innovation areas Innovation process Main steps of the Process Methods & tools for innovation Examples of Innovations

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The role of technological innovation for dry storage of used nuclear fuel l.jpg

The role of technological innovation for dry storage of used nuclear fuel

H.Issard – June 2010


Summary l.jpg

Summary

  • The innovation mandate

    • Mission & Objectives

    • Key performances

  • Innovation areas

  • Innovation process

    • Main steps of the Process

    • Methods & tools for innovation

  • Examples of Innovations

  • Conclusion

International conference on management of spent fuel from nuclear power reactors– June 2010


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innovation mandate

  • Mission and objective

    • Innovation is a keystone for the strategy of the back end,

    • Need to integrate evolutions and New technologies

    • Nuclear utilities needs evolve

    • Additional payload, acceptance of higher discharge burnups and easier licensing process

  • Key performances

    • Storage capacity and economical performance

    • Safety and ease of licensing

    • Ease of operation and reduction of doses of operators

    • Impact of selected technology on sustainable development

    • Impact of selected technology on proliferation issues

International conference on management of spent fuel from nuclear power reactors– June 2010


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innovation areas

  • Storage equipment design

    • Cost, capacity, flexibility of the storage system

  • Interfaces for handling, loading and transfer

    • Tie down designs

    • Quick evacuation procedure

  • Justification methodology

    • Modelisation

    • Knowledge of safety margins

    • Material behaviour for longer periods

    • Damaged fuels

International conference on management of spent fuel from nuclear power reactors– June 2010


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innovation process

  • Innovation process

    • Perform regular interviews with customers and utilities

    • Access, capture and reuse of experience feedback and knowledge

    • Creativity and idea generation

    • Screen ideas for added value

    • Selection of ideas and R&D plan

  • Factors of success

    • Participatory innovation : creation, collaboration, communication

    • Involvement of everyone, including top management

    • incentives

International conference on management of spent fuel from nuclear power reactors– June 2010


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Innovation process , methods

  • AREVA logistics open space of innovation : ID school

    • Initiatives : creativity groups

    • Express ideas through drawings, models

    • Creative ambiance, develop participatory innovation

International conference on management of spent fuel from nuclear power reactors– June 2010


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E

EXPLORE(Exploration, Impregnation):

Identify all the aspects of the problem without paying too much attention to the aspect which brought the problem to light; look at it from all angles without any prejudices or preconceived ideas, become immersed in it and take it on board

Every step

is the result of a divergent and a convergent phase

F

I

FORMALIZE(Expression, Analysis, Formulation, Incubation): Analyze and structure in detail the formulation of the problem and all its components and break it down into targeted areas of research; specify objectives, requirements and selection criteria

C

A

IDEAS (Creation, Ideas, Enrichment, Inspiration) :

Put together and produce for each area of research a large number of solutions and original ideas; deepen and enrich ideas

CONSTRUCTION (Prioritization, Choice, Valorisation): :

Range, prioritize, select ideas following the previously defined selection criteria; combine and enrich ideas (cross-fertilization)

ACTION(Application, Organisation, Action Plan) :

For any solution, build an action plan, i.e. a program with detailed facts and figures for implementation

Innovation process, methods

  • Methods to galvanize innovation

    • Brainstorming, Triz, etc

    • Creativity method developed by AREVA : method EFICA ®

International conference on management of spent fuel from nuclear power reactors– June 2010


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Tools for innovation

  • Tools for management of ideas

    • Ideas are welcome

    • Idea management data bank (example ID HALL)

    • Regularly, a committee evaluates each new idea:

      • Apply

      • Stand by

      • Rejected

International conference on management of spent fuel from nuclear power reactors– June 2010


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Examples of Innovations

  • Baskets : High performance design solutions for sub-criticality

    • Trend towards high burn-ups for LWR fuels ( 60 000 MWd/tHM for the EPR) higher fissile contents = higher U-235 enrichments (5%) or higher plutonium contents for MOX. Sub-criticality is guaranteed by the basket geometry and the material. real challenge to design high capacity baskets. Use of a family of borated alloys : Borated stainless steel plates or Metal matrix composites, formed by casting, powder metal processes.

    • All characteristics (composition, mechanical) have been studied, including the homogeneity of Boron content and the resistance to corrosion in borated water; they are satisfactory. Boralyn™ with 15% B4C is an example of high performance materials for sub-criticality: it can be used for the structural resistance of the baskets. There is also the new Boron Metal Matrix Composite (MMC) material with an aluminium matrix and up to 25% B4C.

International conference on management of spent fuel from nuclear power reactors– June 2010


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Examples of Innovations

  • Innovation in containment

    • A new type of fluorocarbon O-ring gaskets has been developed and qualified to keep the guaranteed leak rate for a large range of temperatures -40°C to 200°C.

    • The long term behaviour at high temperature of EPDM O-ring gaskets has been studied with innovative methodology , to establish time-limit versus temperature for EPDM O-rings.

International conference on management of spent fuel from nuclear power reactors– June 2010


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Examples of Innovations

  • Mitigation of hydrogen risk

    • For the mitigation of hydrogen risk in the cavity of casks, several catalytic recombiners have been developed and qualified, with a sufficient capacity to stabilise the hydrogen concentration bellow the flammability limit. In cooperation with French research institute IRCELYON.

    • Recombiner (dry conditions) Recombiner dry /wet Box for recombiners

International conference on management of spent fuel from nuclear power reactors– June 2010


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Examples of Innovations

  • Complete range of high performance neutron shielding materials

    • TN has developed high performance neutron shielding materials resisting to fire tests (self extinguishing) : TN® VYAL B, TN® HYPOP and TN® BORA for sub-criticality. These materials are adapted to different thermal environments and can be selected depending the temperature of use.

  • Solutions for thermal and structural management

    • For a given metallic containment vessel containing a given number of used fuels, the necessary thickness of neutron shielding material increases when Burnup of fuel increases. Innovation : a better heat evacuation system to compensate the negative effect of thermal insulation of neutron shielding material (polymers are generally low heat-conductive materials) : thermal conductors, fins, special surface treatments, and minimizing gap between cask inner wall/basket .

International conference on management of spent fuel from nuclear power reactors– June 2010


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Examples of Innovations

  • Spent fuel dry storage systems

    • TN®DUO

      • Storage Transport

International conference on management of spent fuel from nuclear power reactors– June 2010


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Examples of Innovations

  • Spent fuel dry storage systems

    • TN®NOVA

      • Cannister Overpack transport cask

International conference on management of spent fuel from nuclear power reactors– June 2010


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Conclusion

  • The role of innovation for the management of used fuel is to bring important benefits in term of performance, safety and public acceptance.

  • With innovation, the nuclear industry, and especially the back end is looking towards the long term and engaged in preparing a future with less CO2 emissions.

International conference on management of spent fuel from nuclear power reactors– June 2010


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