http://www.irsn.fr/FR/expertise/rapports_expertise/Documents/surete/rapport_sur_l_inondation_du_site_du_blayais.pdf Rapport sur l'inondation du site du Blayais survenue le 27 décembre 1999] Institute for Nuclear Protection and Safety, published 2000-01-17, accessed 2011-03-21 The 1998 annual review of plant safety for the plant identified the need for the sea walls to be raised to 5 meters above NGF, and envisaged that this would be carried out in 2000, although EDF later postponed the work until 2002.