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DI&C Project & Lead-Plant Experiences

DI&C Project & Lead-Plant Experiences. Gordon Clefton March 11, 2009. Digital Experiences --- Agenda. Why Digital Upgrades Digital Operating Experience at Oconee Lessons Learned with Oconee’s LAR Digital Project Path Forward. Why Digital Upgrades (1 of 1).

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DI&C Project & Lead-Plant Experiences

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  1. DI&C Project & Lead-Plant Experiences Gordon Clefton March 11, 2009

  2. Digital Experiences --- Agenda • Why Digital Upgrades • Digital Operating Experience at Oconee • Lessons Learned with Oconee’s LAR • Digital Project Path Forward

  3. Why Digital Upgrades(1 of 1) • Driving Forces for Digital Upgrades • Existing plant systems are obsolete • Spare parts are limited • Component repairs are addressing near-term equipment issues • Elimination of single failure vulnerabilities through redundant equipment • Enhancements to system design and functions • Significantly improved on-line monitoring and channel check capability

  4. Digital Operating Experience at Oconee (1 of 2) • Digital Upgrades completed on Oconee Units: • Integrated Control System (1996-1998) • Operator Aid Computer (1998-1999) • Main Turbine Control System (2002-2004) • Digital Control Rod Drive Control System • Turbine Supervisory Instrumentation • Foundation Fieldbus System for Instrument Loop Upgrades (Process Control System) • Electrical Generator Automatic Voltage Regulator

  5. Digital Operating Experience at Oconee (2 of 2) • Positive OE from Digital Upgrades: • Replaced obsolete systems which had performance problems • Improved system and plant reliability by installing redundancy to eliminate single point vulnerabilities • Improved reactivity management by increasing system stability and reducing operator burden during power maneuvers • Significantly improved: • System monitoring • Online functional check capabilities • Improved diagnostic capabilities

  6. Lessons Learned with Oconee’s LAR(1 of 1) • For digital upgrades requiring NRC approval (RPS & ESPS), lessons learned by Oconee: • Regulatory findings • Regulatory standards • High quality, accurate, and timely documents • Milestone schedule • Communications • NRC/Vendor/Utility Engineering strength

  7. Digital Project Path Forward(1 of 1) • Interim Staff Guidance (ISG): • Revise DI&C-ISG-02, ISG-04, & ISG-05 • Create DI&C-ISG-06 & ISG-07 • Roll ISG content into permanent guidance • Digital Project Workshops • Lessons Learned (Oconee & Wolf Creek) • LAR Preparation using ISGs

  8. DI&C Project & Lead-Plant Experiences • Questions ? • Items to carry to NEI ?

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