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Engineered Infills for Concrete Barriers



Kenneth A. Snyder, C Langton, B Clark, Chiara C. Ferraris, J Dawson


Entombment may be considered as an option for decommissioning nuclear concrete structures so that licenses for facilities on which these structures reside may be terminated. Prior to entombment, the nuclear facility permanently ceases operations and spent fuel is removed. After preliminary decommissioning activities are completed, some radioactively contaminated components would be left in an existing structure on the site. The radioactive materials are then entombed with an engineered barrier system that could include filling the structure with a grout or infill. Cementitious grouts are a viable candidate for entombment. They can be mechanically stable, and can provide both a physical and a chemical barrier to radionuclide transport. As the concrete structure may be an important barrier to the transport of radionuclides, leaching of radionuclides from both the existing concrete structure and the possible cementitious grout of infill are important parameters to service life performance prediction.
NIST Interagency/Internal Report (NISTIR) - 7311
Report Number


concrete, constructability, degradation, leaching, rheology, service life, transport


Snyder, K. , Langton, C. , Clark, B. , Ferraris, C. and Dawson, J. (2006), Engineered Infills for Concrete Barriers, NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD (Accessed April 18, 2024)
Created April 2, 2006, Updated October 12, 2021