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Current and Foreseen IC RD Themes in French NPPs N. Thuy EDF RD

4/6/2012. IAEA, May 23-25, 2005. 2. Nuclear Power Plants in France. Currently: 58 NPPs900 MW series6 CP0, 18 CP1, 10 CP2 unitsConnection to the grid: 1977 - 19882nd ten-yearly outage: 1998-20083rd ten-yearly outage: 2008-20181300 MW series20 P4 / P'4 unitsConnection to the grid: 1985 - 1994

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Current and Foreseen IC RD Themes in French NPPs N. Thuy EDF RD

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    1. 4/6/2012 IAEA, May 23-25, 2007 1 Current and Foreseen I&C R&D Themes in French NPPs N. Thuy EDF R&D

    2. 4/6/2012 IAEA, May 23-25, 2005 2 Nuclear Power Plants in France Currently: 58 NPPs 900 MW series 6 CP0, 18 CP1, 10 CP2 units Connection to the grid: 1977 - 1988 2nd ten-yearly outage: 1998-2008 3rd ten-yearly outage: 2008-2018 1300 MW series 20 P4 / P’4 units Connection to the grid: 1985 - 1994 2nd ten-yearly outage: 2005-2013 1450 MW (N4) series 4 N4 units Connection to the grid: 1996 - 1999 1st ten-yearly outage: 2008-2010 Future: EPR series First of the series: currently being designed and built Full series: built after a few years of operation of the first of the series I&C unlikely to be exactly the same

    3. 4/6/2012 IAEA, May 23-25, 2005 3 Strategic Objectives Regarding NPPs Achieve maximum plant useful life Current planned lifetime for existing plants: 40 years When possible and cost-effective: extension to up to 60 years Not all plants will be extended beyond 40 years Maintain safety Increase plant performance Increase generation capacity Improve availability and reliability Improve maneuvrability Reduce O&M costs Design and build the EPR plant in Flamanville Large number of “smart” devices and equipment New regulatory requirements

    4. 4/6/2012 IAEA, May 23-25, 2005 4 I&C Technologies in Existing Plants

    5. 4/6/2012 IAEA, May 23-25, 2005 5 Management of I&C Obsolescence Ageing of I&C equipment Analog equipment, digital equipment, cabling, connectors Understanding of ageing mechanisms and factors, in particular for current integrated circuits and electronic boards Estimation / Extension of remaining lifetime Long-term management of I&C expertise Ageing workforce, inadequate documentation, digital technologies tend to become obsolete rapidly Identification and documentation of key knowledge, including I&C design basis Means to retrieve and use documented knowledge Commercial unavailability Management of spares, long-term storage, verification Approaches to facilitate replacement E.g., portability of applications on “easily” replaceable platforms

    6. 4/6/2012 IAEA, May 23-25, 2005 6 Safety Related Issues - 1 Regulatory uncertainties regarding “new” technologies ASICs / FPGAs Might be a cheaper, simpler solution than PLC-based solutions Also to replace specific components of I&C systems Wireless technologies May avoid / limit need for new cabling for additional monitoring measurements Could be used to assist and integrate the work and actions of local teams Data communication networks Cyber-security Safety evaluation of COTS I&C equipment I&C platforms, “smart” devices What is common to, and can be shared by, all / most countries? What can be shared with other safety-aware industries?

    7. 4/6/2012 IAEA, May 23-25, 2005 7 Safety Related Issues - 2 Evaluation of the overall impact of I&C modernisation on plant safety New technologies may introduce new failure modes New technologies may also have beneficial effects E.g., improved equipment reliability, improved fault tolerance Representation of digital systems in probabilistic models Realistic consideration of software common cause failures Need for clear EMI qualification criteria

    8. 4/6/2012 IAEA, May 23-25, 2005 8 Improvement of Plant Performance - 1 Complementary means to improve plant performance Power uprate Reduction of uncertainties in measurements to increase power output while maintaining safety margins Improved plant availability I&C equipment critical to plant availability Identification Dependability assessment Evaluation of effects on plant availability Reduction of likelihood of human errors Improved fault tolerance Improved actuator lifetimes Improved diagnostics

    9. 4/6/2012 IAEA, May 23-25, 2005 9 Improvement of Plant Performance - 2 Improved equipment reliability Identification of wear & ageing mechanisms, and of I&C contribution Predictive, condition-based equipment maintenance, early fault detection Practical operation & maintenance decision aids from raw information Additional information for improved equipment reliability Improvement of thermal efficiency Detection of thermal losses Reduction of operation & maintenance costs Fleet monitoring, remote access to information by centralised experts Information System, aids aimed at each local Operation Branch (Control, Maintenance, etc) Homogeneous control room systems

    10. 4/6/2012 IAEA, May 23-25, 2005 10 Optimisation of Costs and Uncertainties of I&C Projects Guidance for good utility requirements Guidance for analogue - digital transition Guidance to minimise costs and uncertainties of I&C modernisation projects Evaluation of costs, risks, benefits of different I&C modermisation options Including maintenance of statu quo Over the remaining lifetime of the plant Consideration also of capital budget and license renewal constraints

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