Division 2 Infrastructure standard (Article 5)

Describe how the infrastructure standard is complied with, including the main values used for the N – 1 formula and alternative options for its compliance (with directly connected Member States, demand-side measures) and the existing bidirectional capacities, as follows:

1. (a)

   N – 1 formula

   1. (i)

      the identification of the single largest gas infrastructure;

   2. (ii)

      the calculation of the N – 1 formula F1for the United Kingdom;

   3. (iii)

      a description of the values used for all elements in the N – 1 formula, including intermediate values used for their calculation (e.g. for EP_m indicate the capacity of all entry points considered under this parameter);

   4. (iv)

      an indication of the methodologies used, if any, for the calculation of parameters in the N – 1 formula (e.g. D_max) (use annexes for detailed explanations);

   5. (v)

      an explanation of the results of the calculation of the N – 1 formula considering the level of storages at 30 % and 100 % of the maximum working volume;

   6. (vi)

      an explanation of the main results of the simulation of the N – 1 formula using a hydraulic model;

   7. (vii)

      if so decided by the F2Secretary of State, a calculation of the N – 1 formula using demand-side measures:

      • calculation of the N – 1 formula in accordance with point 2 of Annex II,

      • description of the values used for all elements in the N – 1 formula, including intermediate figures used for the calculation (if different to the figures described under point 2(a)(iii)),

      • indicate the methodologies used, if any, for the calculation of parameters in the N – 1 formula (e.g. D_max) (use annexes for detailed explanations),

      • explain the market-based demand-side measures adopted/to be adopted to compensate a disruption of gas supply and its expected impact (D_eff);

   8. (viii)

      F3...

2. (b)

   bi-directional capacity

   1. (i)

      indicate the interconnection points equipped with bidirectional capacity and the maximal capacity of bi-directional flows;

   2. (ii)

      indicate the arrangements governing the use of the reverse flow capacity (e.g. interruptible capacity);

   3. (iii)

      indicate interconnection points where an exemption has been granted in accordance with Article 5(4), the duration of the exemption and the grounds on which it was granted.