Linear Array Ultrasonic Test Results from Alkali-Silica Reaction (ASR) Specimens

Technical Report · Fri Apr 01 04:00:00 EDT 2016

DOI:https://doi.org/10.2172/1248797· OSTI ID:1248797

Clayton, Dwight A ^[1]; Khazanovich, Dr. Lev ^[2]; Salles, Lucio ^[2]

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1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
2. Univ. of Minnesota, Minneapolis, MN (United States)

The purpose of the U.S. Department of Energy Office of Nuclear Energy’s Light Water Reactor Sustainability (LWRS) Program is to develop technologies and other solutions that can improve the reliability, sustain the safety, and extend the operating lifetimes of nuclear power plants (NPPs) beyond 60 years. Since many important safety structures in an NPP are constructed of concrete, inspection techniques must be developed and tested to evaluate the internal condition. In-service containment structures generally do not allow for the destructive measures necessary to validate the accuracy of these inspection techniques. This creates a need for comparative testing of the various nondestructive evaluation (NDE) measurement techniques on concrete specimens with known material properties, voids, internal microstructure flaws, and reinforcement locations.This report presents results of the ultrasound evaluation of four concrete slabs with varying levels of ASR damage present. This included an investigation of the experimental results, as well as a supplemental simulation considering the effect of ASR damage by elasto-dynamic wave propagation using a finite integration technique method. It was found that the Hilbert Transform Indicator (HTI), developed for quantification of freeze/thaw damage in concrete structures, could also be successfully utilized for quantification of ASR damage. internal microstructure flaws, and reinforcement locations.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1248797
• Report Number(s): ORNL/TM--2016/159
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
36 MATERIALS SCIENCE
42 ENGINEERING
ACCURACY
Alkali Silica Reaction
CHEMICAL REACTIONS
COMPUTERIZED SIMULATION
CONCRETES
CONTAINMENT
DAMAGE
DEFECTS
EVALUATION
HYDROXIDES
MICROSTRUCTURE
NONDESTRUCTIVE ANALYSIS
NUCLEAR POWER PLANTS
RELIABILITY
SILICA
SLABS
TESTING
ULTRASONIC TESTING
VOIDS
WATER COOLED REACTORS
WATER MODERATED REACTORS
WAVE PROPAGATION
concrete NDE
nondestructive evaluation
nuclear power
thick