A stringent quality control plan was established for the permanent geomembrane-based capping system to be built over the low and medium activity, short-lived (300 years) radioactive waste landfill repository at the Manche Centre de Stockage in France. Since minimum containment integrity was stipulated as 300 years, the quality control plan covered all stages of design, selection and manufacture of the bituminous geomembrane, transport and storage of the rolls, field fabrication, hot air welding and 100% ultrasound inspection of all seams.
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