Reactor Safety Research Programs Quarterly Report October - December 1980 Page: 13 of 122
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GRAPHITE NONDESTRUCTIVE TESTING(a)
W. C. Morgan, Project Manager
T. J. Davis, Project Manager
M. T. Thomas
SUMMARY
Our work during this quarter centered on refinement of a computer algo-
rithm for estimating near-surface conductivity profiles from eddy current data.
A progress report covering our work in fiscal year (FY)-1980 is being prepared.
INTRODUCTION
This is a continuation of previous work at Pacific Northwest Laboratory
(PNL) that demonstrated the feasibility of monitoring changes in the compres-
sive strength of oxidized graphite by measuring changes in the velocity of an
ultrasonic wave propagated through the graphite. The FY-1981 scope of this
project is to:
* develop eddy current techniques for near-surface profiling of oxida-
tion in the Fort St. Vrain PGX core support blocks, including initi-
ation of a prototype system development leading to interpretable
indications of graphite strength
complete assessment of ability to profile oxidation using ultrasonic
surface waves; determine technical feasibility of using ultrasonic
backscattering techniques to find in-depth oxidation profiles; con-
tinue evaluation of high-power ultrasonic tests and acoustic imaging
techniques for bulk oxidation measurements as appropriate
* as funds permit, outline development of predictive techniques for
oxidation depth profiles under reactor environments to provide
strength indications for large graphite components.
(a) RSR Fin. Budget No.: B2101-1; RSR Contact: R. B. Foulds.1
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Edler, S K. Reactor Safety Research Programs Quarterly Report October - December 1980, report, April 1, 1981; Richland, Washington. (https://digital.library.unt.edu/ark:/67531/metadc842916/m1/13/: accessed May 7, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.