Are your dams in need of a face-lift? Call on GEORGES for a swift response!


Frédéric Taillade

Frédéric Taillade R&D

Olivier Bory

Olivier Bory EDF Hydro

Jonathan Tireau

Jonathan Tireau R&D

Enrique Leite

Enrique Leite R&D

In a word

Numerous dams use polymer geoliners to keep them leak-tight, thereby enhancing their performance and operational safety. The GEORGES system is designed to inspect the condition of geoliners in order to extend their service life and proactively identify necessary replacements so that these can be scheduled whilst minimising potential impacts on plant operation and other types of dam usage.

The project

The Hydro Engineering Centre (CIH) and EDF R&D have developed the GEORGES system (the acronym stands for "Predictive Geoliner Replacement System") in order to predict ageing and rationalise maintenance on dam geoliners.

Depending on the dam and the season, spurious drainage (due to sealant failure, for example) could result in operational losses amounting to millions of Euros a week or cause problems if the dam is used for other purposes such as the supply of domestic water, irrigation or tourism.

This EDF-patented innovation predicts a dam liner’s end-of-service-life, thereby giving an exact indication of when it should be replaced. The method has been piloted on geoliners in the Chambon, Girotte and Riou dams!

The inspection and maintenance of these sealing systems are a generic requirement, as evidenced on a large number of dams around the world (several hundred). More generally speaking, polymer ageing (such as PVC which is used to manufacture geoliners) is a concern in many other areas. The method could be tailored to rationalise the maintenance of electrical cables on nuclear power plants (1 500 kilometres of cables per reactor unit).

Why is this a game changer ?

number of EDF dams fitted with a geoliner ranging from 2 to 47 years of age, which have to be monitored.
Millions of Euros/week
estimated operational losses on strategic dams in the event of unexpected geoliner failure.
average cost incurred by on-site replacement of a geoliner. Thanks to Georges, replacement can be postponed whilst preventing risks.

EDF Pulse Internal Awards Calendar


6 January 2020

Launch of the 7th edition of the EDF Pulse Internal Awards.

31 January 2020

Registration closes. 330 files received.

11 March – 13 March 2020

Selection of the 24 finalist projects by the selection committees.

23 March 2020

Announcement of the 24 finalist teams

2 November – 1st December 2020

Employees vote for their favorite project.

12 January - 13 January 2021

Finalists coaching.

13 January 2021

Auditions before the members of the Group's Executive Committee. Awards ceremony.

13 January 2021

Revelation of the 7 winners!