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Concrete Degradation by Carbonation, Data Needs for EST and General Recommendations for Resolution: The concrete in the pad and cask is subject to degradation by carbonation throughout EST. There is presently no program for monitoring carbonation and technologies to support a demonstration that the pH condition at the embedded reinforcement bars in the pad and shell is benign to corrosion is needed. Specifically,
1. Monitoring/In-Service Inspection Activity: Develop monitoring/in-service inspection protocol for carbonation with acceptance criteria.
2. Testing & Analysis Activity: Investigate new technologies for NDE for carbonation in concrete.