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Extra resources for Defects and Repair - Concrete Structures in Nuclear Powerplants Vol 1 (csni-r2002-7)

Sample text

Quite often options (3) and (4) are considered jointly. 2 Repair materials and techniques Deterioration of reinforced concrete generally will result in cracking, spalling, or delamination of the cover concrete. Corrosion resulting from either carbonation or the presence of chlorides is the dominant type of distress that impacts reinforced concrete structures. More detailed information to that provided below on typical remedial measures for NPP concrete structures is available [16-18]. , mechanism still operating).

3m. These results show that it is feasible to use the IESASW method to detect the voids (filled with either water or not) and PVc pipe. 4. 1. Test specimen-A A ground penetrating radar (GPR) was employed and tested on both specimens A and B for the comparison purpose. Figure 12 shows the typical processed image corresponding to the profile of test specimen-a, which recorded with 1200mhz antennas. This section shows reflected and diffracted signals (hyperbolas designated by arrows) in response to the different objects: (1) six rebars, and (2) the void where there is no rebar.

This paper has also been prepared in part by an employee of the USNRC and presents information that does not currently represent an agreed-upon Staff position. The USNRC has neither approved nor disapproved its technical content. S. S. Government purposes. 10. References 1. American Concrete Institute, 1964. Building Code Requirements for Reinforced Concrete, ACI Standard 318-71, Detroit, Michigan. 2. Lo, T. , 1984. “Containment Integrity of SEP Plants Under Combined Loads,” in Proceedings of the ASCE Conference on Structural Engineering in Nuclear Facilities, J.

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