All TSOs’ proposal for amendment of the Determination of capacity calculation regions methodology in accordance with Article 15(1) of the CACM

Closed 21 Aug 2023

Opened 7 Jul 2023


The Single Electricity Market (SEM) of Ireland and Northern Ireland does not have an interconnector with European Union and, due to Brexit, the former IU CCR (SEM-GB CCR) no longer exists.

The SEM is expected to be re-coupled with the EU in 2026, when the Celtic Interconnector is planned to go live. The Celtic Interconnector is a planned subsea HVDC 700 MW link to allow the exchange of electricity between SEM and France. Specifically, the 575 km interconnector is between Knockraha (Ireland) and La Martyre (France).

The Celtic Interconnector will create a new Bidding Zone Border between the bidding zones of SEM (Single Electricity Market) and FR (France).

This proposal for the amendment of the Determination of Capacity Calculation Regions suggests to include the upcoming SEM-FR Bidding Zone Border into Core CCR.

TSOs believe that joining the Core Region and its Flow-Based Capacity Calculation is an appropriate choice, fostering electricity market integration and also facilitating the energy transition.

Therefore, ENTSO-E launches a public consultation on the proposal for amendment of the methodology.

Why your views matter

We are seeking input and feedback from relevant stakeholders, market participants, NRAs and NEMOs for the proposal for .


  • ENTSO-E stakeholders


  • Market Network Codes