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UNC 0407 Analysis Scope - Update

UNC 0407 Analysis Scope - Update. Offtake Arrangements Workgroup – October 2012. Overview. Analysis was scoped to identify any NTS investment costs associated with the implementation of UNC 0407

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UNC 0407 Analysis Scope - Update

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  1. UNC 0407 Analysis Scope - Update Offtake Arrangements Workgroup – October 2012

  2. Overview • Analysis was scoped to identify any NTS investment costs associated with the implementation of UNC 0407 • This analysis in the process of being completed by GL Noble Denton – delivery still as we outlined at July UNC Panel meeting • Impact of the proposal to remove the 2hr 5% rule on the NTS effectively leads to an: • increased lag between changes made at NTS offtakes and subsequent changes at entry points. • This is covered by the NTS Design Margin as DN demand changes would be met through more rapid NTS/LDZ offtake changes. • The NTS Design Margin is used within the system planning process to create operational linepack • GL Noble Denton completed the last review of the NTS Design Margin in 2008

  3. Impact of UNC 0407

  4. Analysis Scope & Timeline • GL Analysis based on implementation of Mod 0407 • Repeat 2006-2008 flow margin analysis making appropriate adjustment to reflect the flow change driver referenced in 0407 • Update analysis using recent NTS operational data to show the impact on Linepack and: • how the issue is developing • how behaviour is changing • Update to include the potential change in behaviour that implementation of 0407 would allow • Network Analysis to identify NTS Investment costs associated with any required increase to the design margin as a consequence of part 1.

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