Conference programme

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Thursday, 19 November 2015
17:00 - 18:30 Managing risk and standardisation
Health & safety  
Onshore      Offshore    

Room: Belleville

Learning objectives

  • Recognise the state of the art and further need for new standards for design and operation
  • Understand how JIPs can help a more economic and at the same time safer operation of wind farms
  • Identify H&S issues pertinent to the Wind industry
Lead Session Chair:
Athanasios Kolios, Cranfield University, United Kingdom

Feargal Brennan, Director of Energy, Cranfield University, United Kingdom
Fabrice Estézet Bureau Veritas, France
Fabrice Estézet (1) F David Navarro (1) Benoît Melen (2)
(1) BUREAU VERITAS, Neuilly-sur-Seine, France (2) Freyssinet International & Cie, , France

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Presenter's biography

Biographies are supplied directly by presenters at EWEA 2015 and are published here unedited

Fabrice Estézet is Wind Product Manager at Bureau Veritas for 5 years. He is a graduate engineer with 14 years of experience in the energy field. He has 4 years experience of Wind Turbine Type Certification and Project Certification and 2 years experience of Wind Farm Project Management.


Certification of an innovative concrete tower and foundation design


In recent years, the wind energy industry has seen a significant increase in the size and height of turbines, which has brought new challenges in terms of certification. The design concept submitted for certification, the Eolift FreyssiWind T119, consisted of an innovative prestressed concrete tower and reinforced concrete foundation, together with a pioneering craneless erection system. This innovative new design involved a large diversity of engineering techniques, and posed significant technical challenges in the design certification process.


The design evaluation was performed by means of two methods: comprehensive document review and independent analysis using Bureau Veritas Certification proprietary software. In carrying out the certification process, Bureau Veritas Certification considered as its reference standard IEC 61400-22. The documentation submitted for the Eolift FreyssiWind T119 was reviewed, and its conformity to the reference standards used for design was assessed (international standards such as IEC 61400-1, EN 1992, EN 1993, Model Code 1990, EN 206-1, GL 2010, etc.).

Main body of abstract

The design certification for tower and foundation was successfully granted within the required time delivery objective, and with no pending conditions. Following on from the successful certification of the tower and foundation, Bureau Veritas Certification and Freyssinet will collaborate on the evaluation of the on-site manufacturing process in Brazil.


This innovative project involved a large diversity of engineering techniques for certification, including precast reinforced concrete elements, external prestressing tendons, ring and segment assembly, and soil improvement by cemented inclusions. These technical demands required close coordination between Bureau Veritas Certification and the client, Freyssinet. As a result of this cooperation, the design of Eolift FreyssiWind T119 was continually improved throughout the evaluation process, resulting in enhancements to both its safety and performance.

Learning objectives