How tried-and-tested repair materials were used to fix a problem with the cooling water system of a nuclear power plant, writes Marina Silva Composite repairs and wrap systems are not necessarily a hot topic anymore, with many standards, procedures and case studies available on the subject. However, every so often we still come across a story of a simple wrap being used as an ingredient for an unorthodox, well-engineered repair solution. One such solution involved a nuclear power station in France, where the operators identified a problem at the bottom of a sump pit of their cooling water system. The 200mm ID suction pipe protruding from a concrete wall was experiencing severe corrosion. An externally-applied repair was not feasible as corrosion extended well beyond the area encapsulated in concrete. Belzona’s distributor in western France, Alliatech, came up with a unique solution which would solve the problem and prevent any further corrosion for the long term. A cut and weld technique would have caused needless downtime and the extent of metal degradation called for more than a protective lining. For minimum downtime and fast return to service, a repair had to be completed f...