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

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 reinforcementmore » locations.« less
Authors:
 [1] ;  [2] ;  [2]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Univ. of Minnesota, Minneapolis, MN (United States)
Publication Date:
OSTI Identifier:
1248797
Report Number(s):
ORNL/TM--2016/159
TRN: US1601275
DOE Contract Number:
AC05-00OR22725
Resource Type:
Technical Report
Research Org:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 36 MATERIALS SCIENCE; 21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; NUCLEAR POWER PLANTS; CONCRETES; SILICA; WATER MODERATED REACTORS; DAMAGE; WATER COOLED REACTORS; NONDESTRUCTIVE ANALYSIS; WAVE PROPAGATION; ACCURACY; CONTAINMENT; DEFECTS; EVALUATION; MICROSTRUCTURE; RELIABILITY; COMPUTERIZED SIMULATION; SLABS; TESTING; VOIDS; ULTRASONIC TESTING; CHEMICAL REACTIONS; HYDROXIDES concrete NDE; nuclear power; nondestructive evaluation; thick; Alkali Silica Reaction