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Review of Offtake Arrangements Document Section I - NTS Operational Flows

Review of Offtake Arrangements Document Section I - NTS Operational Flows. 9 th July 2010 – Offtake Arrangements Workstream. Review --- how to approach?. Re-test some basic assumptions on why information is needed and WHAT it is used for (by NTS and DNs).

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Review of Offtake Arrangements Document Section I - NTS Operational Flows

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  1. Review of Offtake Arrangements DocumentSection I - NTS Operational Flows 9th July 2010 – Offtake Arrangements Workstream

  2. Review --- how to approach? • Re-test some basic assumptions on why information is needed and WHAT it is used for (by NTS and DNs). • Wouldn’t necessarily start with existing Section I rules • No hidden agendas..we all have businesses to run, safe and efficient so lets be efficient in this regard. • No tail wagging the dog! Let’s create a set of business requirements that work, NOT shoe horn procedures around pre existing rules that do NOT!

  3. Why now? • Inappropriate to knowingly continue in a potential non compliant position • Never a good time...momentum gained..keep it moving • Earliest possible signals for any I.S alterations to develop in existing systems (link to SOMSA timeframes or DNCS?) • Any issues lurking in Exit Reform from October 2012 flushed out in sufficient time to manage.

  4. Review Proposal – suggested T.O.R • General review of the current NTS Operational flow requirement arrangements and processes within UNC OAD Section I to determine if they are still appropriate, coherent and relevant. • Implications of any changes to OPNs • Implications of any revisions to pressure commitments between National Grid NTS and GDNs • Review of application of Low Demand Days • Suitability of percentage measures as Offtake tolerances • Aggregation of requests by LDZ vs Exit zone • Impact of the implementation of Modification Proposal 0195AV (‘Introduction of Enduring NTS Exit Capacity Arrangements’

  5. Things to consider • Should any conditions in OAD be amended to reflect a more relevant condition? • Are there any absent conditions which should be included? • What are the benefits for both parties (NTS and DNO) by adhering to existing OAD clauses (which may create additional workloads) to warrant full compliance?

  6. OFFTAKE PROFILE NOTICES (OPNs) • Implications of any changes to OPN requirements • Relevant usage & requirements by Networks • Differing interpretation of existing OPN requirements • Map to current OAD (Amend as required) • IS issues • Implementation timeframes

  7. Pressure Requirements • Why DNs need pressure requirements and WHEN! • Not every day? • Key times between 22.00 & 06.00 • What constrains NTS? Compressor costs? Other? • Impact on DNs – Linepack depletion... • Reporting of current OAD requirements.

  8. LOW DEMAND DAYS • To be expanded • the promotion of a co-operation clause....

  9. Offtake tolerances • Is the 10% (Offtake) and 3% (LDZ) measure correct? • Differentiation by offtake • Measurement by exit zones? • X% plus X metre tolerance? • Reporting requirements?

  10. Impact of Exit Reform (2012) • Separate or theme to run through all subject areas?

  11. Timeline July 9th Agree T.O.R and work plan 15 July - Take review Proposal to UNC Modification Panel for formal constitution of Review Group August 6th– Offtake WS / Review Group OPNS Exit zone vs LDZ measures September 3rd– Offtake W/S / Review Group Low demand Days Pressure Commitments October 8th– Offtake W/S / Review Group Sweep up

  12. Review of Offtake Arrangements DocumentSection I - NTS Operational Flows 9th July 2010 – Offtake Arrangements Workstream

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