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          NRC Library  Document Collections  NUREG-Series Publications  Publications Prepared by NRC ContractorsPrimer on Durability of Nuclear Power Plant Reinforced Concrete Structures - A Review of Pertinent Factors (NUREG/CR-6927)

On this page: Publication Information AbstractDownload complete document NUREG/CR-6927 (PDF - 26.5 MB)Publication Information **Manuscript Completed:** November 2006**Date Published:** February 2007 **Prepared by:** D.J. Naus Oak Ridge National Laboratory Managed by UT-Battelle, LLC P.O. Box 2008 Oak Ridge, TN 37831-6283 H.L. Graves, III, NRC Project Manager **Prepared for:**Division of Fuel, Engineering and Radiological Research Office of Nuclear Regulatory Research U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 NRC Job Code N6002 Availability Notice Abstract The objective of this study was to provide a primer on the environmental effects that can affect the durability of nuclear power plant concrete structures. As concrete ages, changes in its properties will occur as a result of continuing microstructural changes (i.e., slow hydration, crystallization of amorphous constituents, and reactions between cement paste and aggregates), as well as environmental influences. These changes do not have to be detrimental to the point that concrete will not be able to meet its performance requirements. Concrete, however, can suffer undesirable changes with time because of improper specifications, a violation of specifications, or adverse performance of its cement paste matrix or aggregate constituents under either physical or chemical attack. Contained in this report is a discussion on concrete durability and the relationship between durability and performance, a review of the historical perspective related to concrete and longevity, a description of the basic materials that comprise reinforced concrete, and information on the environmental factors that can affect the performance of nuclear power plant concrete structures. Commentary is provided on the importance of an aging management program. 
      
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