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Transmission Workstream 1st September 2005

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Presentation on theme: "Transmission Workstream 1st September 2005"— Presentation transcript:

1 Transmission Workstream 1st September 2005
"Optional specification for Carbon Dioxide, Nitrogen and Total Inerts at NTS Entry Points" Transmission Workstream 1st September 2005

2 Proposal - background Transco NTS is in the process of agreeing contractual gas specifications for new imports and indigenous sources of gas The new supplies will help ensure security of supply from the winter of 2006 onwards However, the new gases are likely to contain CO2 and Total Inerts (CO2 + N2) in excess of the limits published in the 2004 Ten Year Statement specification (2.0% and 7.0% respectively)

3 Specification of the new gases
New imports may contain up to 2.5% CO2 and Total Inerts in excess of 7.0% However, the requested specification is compatible with the first phase of EASEE-gas harmonisation proposed to be in place from 1st October 2006 (2.5% CO2; N2 and Total Inerts limited only by Wobbe Number) All new supplies will remain compliant with the Gas Safety (Management) Regulations

4 Proposal - Summary Transco NTS proposes that Delivery Facility Operators be offered a new optional specification for CO2 and Total Inerts, subject to any restrictions imposed by any contractual obligations. Implementation would be through changes to individual bilateral agreements. In order to avoid multiple Code Modifications, it is proposed to raise a single Code Modification to permit changes in respect of all such bilateral agreements.

5 The proposed optional inert gas specification
Gas Quality Characteristic 2004 Ten Year Statement specification EASEE-gas proposed harmonised specification Proposed optional inert gas specification Total Inert Gases 7.0% [removal of any existing direct limitation] No direct limitation N2 CO2 Not more than 2.0% (molar) Not more than 2.5% (molar)

6 Advantages of the Proposal
Allow additional gas into the UK thereby improving security of supply; Allow DFOs to adopt, if requested, inert gas limits as recommended by EASEE-gas without having to raise specific UNC Modification Proposals; Encourage the movement towards a common playing field in respect of contractual inert gas limits.

7 Way Forward Submit Proposal at September Mod Panel
Transco NTS to develop and submit a further Mod Proposal to September Mod Panel relating to Carbon Dioxide levels in excess of 2.5%.


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