Echangeur EVU - EPR Flamanville - EDF - Groupe IWF

Energy Recovery Facility Exchangers (ERF) - Flamanville

After more than 2 year design studies and manufacturing in our workshops, the two energy recovery heat exchangers were added to the Flamanville EDF nuclear power plant infrastructure.

Intended to cool down the recovered demineralised water with the SRU circuit’s seawater, the heads, plates and tube bundles have been fabricated in super duplex UNS S32750. The shell is in 316L stainless steel. In 2 years and despite disruptions linked to the pandemic, ALLIA managed thermal sizing, mechanical calculation, supply, manufacturing and delivery.

Crucial to Flamanville’s EPR start-up, this equipment was given particular treatment by the Client until the end. In order to "de-risk" the EPR’s start-up process, EDF decided to validate the thermal performance of the exchangers before their installation in the depths of Flamanville. This is a first for an exchanger of such power, which could be renewed for the next EPR whose construction has just been announced.



Objective? Designing two exchangers capable of cooling the energy recovery unit‘s demineralised water using the seawater from the SRU circuit.

Presentation of the equipment for our Client EDF Flamanville France:

  • Diameter: 1500mm
  • Length: 8000 mm
  • Empty weight: 32 tonnes
  • 3800 exchange tubes
  • Performance tests in workshop

Echangeur EVU - EPR Flamanville - EDF - Groupe IWF

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