NDE of stainless steel and on-line leak monitoring of LWRs

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The GARD/ANL acoustic leak detection system is under evaluation in the laboratory. Results of laboratory tests with simulated acoustic leak signals and acoustic signals from field-induced intergranular stress corrosion cracks (IGSCCs) indicate that cross-correlation techniques can be used to locate the position of a leak. Leaks from a 2-in. ball valve and a flange were studied and compared with leaks from IGSCCs and fatigue cracks. The dependence of acoustic signal on flow rate and frequency for the valve and the flange was comparable to that of fatigue cracks (thermal and mechanical) and different from that of IGSCCs. Two pipe-to-endcap weldments ... continued below

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Pages: 32

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Kupperman, D.S.; Claytor, T.N.; Mathieson, T. & Prine, D.W. October 1, 1985.

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Description

The GARD/ANL acoustic leak detection system is under evaluation in the laboratory. Results of laboratory tests with simulated acoustic leak signals and acoustic signals from field-induced intergranular stress corrosion cracks (IGSCCs) indicate that cross-correlation techniques can be used to locate the position of a leak. Leaks from a 2-in. ball valve and a flange were studied and compared with leaks from IGSCCs and fatigue cracks. The dependence of acoustic signal on flow rate and frequency for the valve and the flange was comparable to that of fatigue cracks (thermal and mechanical) and different from that of IGSCCs. Two pipe-to-endcap weldments with overlays were examined. Because the amount of cracking in the specimens was limited, the emphasis was on trying understand the nature of crack overcalling. Four 60-mm-thick cast stainless steel plates with microstructures ranging from equiaxed to primarily columnar grains have been examined with ultrasonic waves. 13 refs., 23 figs.

Physical Description

Pages: 32

Notes

NTIS, PC A03/MF A01 - GPO.

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  • 13. water reactor safety research information meeting, Gaithersburg, MD, USA, 22 Oct 1985

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  • Other: TI86004052
  • Report No.: CONF-8510173-39
  • Grant Number: W-31-109-ENG-38
  • Office of Scientific & Technical Information Report Number: 6310544
  • Archival Resource Key: ark:/67531/metadc1209580

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • October 1, 1985

Added to The UNT Digital Library

  • July 5, 2018, 11:11 p.m.

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  • Sept. 5, 2018, 2:14 p.m.

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Kupperman, D.S.; Claytor, T.N.; Mathieson, T. & Prine, D.W. NDE of stainless steel and on-line leak monitoring of LWRs, article, October 1, 1985; United States. (digital.library.unt.edu/ark:/67531/metadc1209580/: accessed December 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.