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DN Interruption Reform

DN Interruption Reform. Gas Customer Forum 27 th July 2009. Agenda. Background to DN Interruption Reform Outcome of 2008 DN Interruption tender DN Analysis Proposed Approach Next Steps. Background to DN Interruption Reform. Implemented 1 April 2008

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DN Interruption Reform

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  1. DN Interruption Reform Gas Customer Forum 27th July 2009

  2. Agenda • Background to DN Interruption Reform • Outcome of 2008 DN Interruption tender • DN Analysis • Proposed Approach • Next Steps

  3. Background to DN Interruption Reform • Implemented 1 April 2008 • DNs tender for interruption rights three years ahead of use • DNs incentivised to procure appropriate level of interruption and investment in networks • Fewer interruptibles from 2011 onwards

  4. Outcome of 2008 DN Interruption Tender

  5. All DNs Prelude

  6. All DNs Post Mod 90

  7. Approach • Identify Firm Load Shedding Capability post Mod 90 • Establish a target based on the performance achieved in Exercise Prelude • NEC wants speed and confidence on DN deliverability • Load shed in 4 hours • LDZ specific • Resources available for Site visits where required • Shipper obligations remain to maintain site contact details

  8. Example – NGG Analysis Prelude

  9. Example – NGG Analysis post Interruption Reform

  10. Next Steps • DN Best Practice • Preparation • Data Validation [NG top 200 per LDZ] • Site Visits > 2 million therms [NG 212 across 5 LDZs] • NEC involved • Industry Engagement • GATG, Distribution w/stream, Gas Customer Forum • Emergency Exercises (2009 and 2010) • Highlight Target Customers • Recycling Contact Information • Escalating Contact Information • Increased Number of Site Visits • Revised DN Safety Case submissions August 2009

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