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The cost of transporting gas through the Interconnector includes a capital
tariff element, a contribution to operating costs, a share of fuel costs
and certain additional costs.
The capital tariff element and contribution to operating costs is paid
for at a set tariff (the same for each Shipper for the same category
of Primary Capacity) irrespective of use.
Fuel costs are 'charged' directly to Shippers using capacity. The 'cost'
of fuel at any given time is apportioned amongst Shippers pro-rata to
their transportation requirement at that time.
When the pipeline is in Forward Flow, each Shipper using either Forward
or Reverse Flow Capacity is required to contribute a share of fuel gas
used - principally by the gas turbines that power the Bacton compressors.
Fuel gas consumption when the pipeline is in Forward Flow typically
amounts to 0.8% of the quantity of gas transported.
When the pipeline is in Reverse Flow, any use of Forward or Reverse
Flow Capacity results in a charge to cover the cost of electricity used
by the electric motors that power the Zeebrugge compressors. Electricity
consumption when the pipeline is in Reverse Flow is typically 1.6 kWh
per MWh of gas transported. In addition, a small amount of fuel gas,
typically around 0.06% of the quantity of gas transported, is consumed
in the gas heaters, and Shippers are required to provide their share.
In addition to the Tariff and the Fuel Costs, additional charges may
arise through the use of Interruptible Capacity and/or through third
party pressure service charges.
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