Corrosion and Long Term Performance of Concrete in NPP and Waste
V. L'Hostis, F. Foct and D. Féron
J. Phys. IV France 136 (2006) III-IV
PrefaceValérie L'Hostis, François Foct and Damien Féron
(Published online 22 December 2006)
The reinforced concrete is widely used in the construction of nuclear power plants, of nuclear facilities and structures for
long-term storage and the disposal of radioactive waste. Indeed this kind of material is used for many purposes, including support,
containment, and environmental protection for different types of facilities: e.g. surface structures,
shallow subsurface vaults and deep underground repositories.
These structures are required to besafe and reliable in challenging and varying environments for periods
of time that can potentially range up to several hundred years. During their operational life, these structures will in all likelihood
be subjected to a number of environmental stresses or ageing factors that may adversely affect their performance and result in shortened
The detection and assessment of the magnitude as well as the rate of occurrence of any environmental factor-related
degradation are key factors in maintaining the capability of these structures to meet their operational requirements. As the knowledge
base for modern concretes, such as would be used in fuel cycle-related facilities, is relatively new (i.e.
about, 100 years
required 200 to 500 or more years), additional inputs are required in several areas to ensure that these structures will continue to
meet their design requirements throughout their operational life.
Within this context, the international Workshop entitled "NUCPERF 2006, Corrosion and Long Term Performance of Concrete in NPP
and Waste Facilities" (EFC Event 284) was held at Cadarache (France), on 27-30 March 2006. Its purpose was to bring together
scientists and engineers from various countries that are developing nuclear power generation and/or waste disposal programmes.
A special focus has been made on the discussion on R& D progress with regard to concrete degradation and corrosion of steel
reinforcements in order to reach a consensus on R& D needs to further develop cooperative programmes. The sessions of the workshop
covered the following areas, from fundamental aspects to technically relevant industrial applications:
- Present and Future Expectations
on regulations, design codes and R& D programmes;
- Experimental Studies
mainly focused on corrosion of
embedded steels and its mechanical consequences, reactive agents transport and chemical degradation of concrete;
of the different mechanisms involved in reinforced concrete degradation (corrosion, transport, mechanics, etc.);
focused on the assessment of reinforced concrete structures and life cycle analysis;
- Feedback Experience
use of field
experiences and archaeological artefacts for the phenomenological understanding and modelling;
- Monitoring and Repair
evaluation, repairing techniques performance...
The organisation and the success of this Workshop have been made possible thanks to
CEA (Commissariat à l'Énergie Atomique) and EDF (Électricité de France) which co-organised this event. It was co-sponsored by EFC/WP4
(European Federation of Corrosion, Nuclear corrosion working party) and OECD/NEA (Nuclear Energy Agency) which the editors want to
warmly thank for their active scientific and practical contributions. The editors would also like to thank the authors who
presented papers of outstanding scientific content and who responded enthusiastically to the discussions and questions raised
during the Workshop, the programme committee, who had to make the tricky selection of the presented papers, and finally the reviewers
of the papers presented in this special issue.
This Workshop was a forum to exchange state-of-the-art knowledge on corrosion and
long-term performance of concrete in nuclear power plants and waste facilities. The editors hope that the scientific results gathered in
these proceedings will be useful to scientists and engineers in the field of
reinforced concrete materials for nuclear applications.Valérie L'Hostis, François Foct and Damien FéronEditors of this Special Issue© EDP Sciences 2006