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Chantiers de l'Atlantique prepares for Saint Nazaire substation piling this summer

By: Bridget Randall-Smith 18/05/2020 parc-eolien-en-mer-de-saint-nazaire

General Vessels Windfarms

The installation of Saint Nazaire's offshore substation is due to start in summer 2020, despite COVID-19 impacts. Chantiers de l'Atlantique started production for the offshore substation in January 2020 but for the past few weeks work has had to be suspended due to the health situation.

Located 12-20 kilometres off the Loire-Atlantique coast, France, the 480 MW Saint Nazaire wind farm will feature 80 GE Haliade 150-6MW turbines with commissioning expected in 2022.

All teams on the future wind farm's construction site have been affected by the COVID-19 pandemic. " We do not yet know the repercussions of this virus on construction," stated project Director Olivier de La Laurencie.

Chantiers de l'Atlantique is responsible for the topside and jacket-type foundation design, manufacturing and commissioning. The jacket measures 50 meters in height and weighs 1,200 tonnes. The topside is 20 meters high, 40 metres long and 30 metres wide, and weighs 2,200 tonnes.

At present, the company has mobilized 20 people for project management, 70 people for studies and around 100 people for construction, then around 200 staff from subcontracting companies. Project partners GE Grid Solutions and SDI / DEME Offshore are mobilizing a further 200 people. These numbers will change as the work progresses.

GE’s Grid Solutions is in charge of high voltage electrical equipment and protection control systems design, manufacturing and commissioning and SDI/DEME is in charge of the transport and installation of these structures, including the offshore pre-piling works.

Heavy Lift DP2 jack-up vessel INNOVATION is expected to install the piles for the jacket foundation during summer 2020 and the DP3 installation vessel ORION, with a a 5000 ton crane, will be mobilized for installation of the topside in 2021.

RTE has also started installing 27 km of terrestrial cables, which run from the landfall site on the Nazairian beach of Courance to the Prinquiau electrical substation. Installation of the turbine foundations, subsea cables and electrical substation will begin in 2021, followed by the turbines in 2022.

The project development is being led by EDF through the Éolien Maritime France (EMF) consortium. Enbridge recently divested 49% of its 50% interest in EMF and three offshore wind projects (Saint Nazaire, Fecamp, and Courseulles) to the Canada Pension Plan Investment Board (CPP Investments). Ownership of Saint Nazaire now includes EDF ( 50%), Enbridge (25.5%) and CPP (24.5%).

For more information on offshore wind farms worldwide, click here.

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Chantiers de l'Atlantique prepares for Saint Nazaire substation piling this summer

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