Evaluation of SCC test methods for Inconel 600 in low temperature aqueous solutions

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In late 1981, widespread leakage was encountered in Alloy 600 steam-generator tubing at the Three Mile Island Unit 1 nuclear power plant. The phenomenon was identified as low-temperature intergranular stress-corrosion cracking (SCC) initiated from the inner surfaces of the tubes exposed to the primary coolant. A testing program was initiated to examine the material and environmental factors relevant to these failures, which were found to be associated with sensitization of the material and contamination of the coolant by air and sodium thiosulfate. The test solutions contained 1.3% boric acid with various additions of sulfur compounds and lithium hydroxide. Constant extension ... continued below

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Pages: 24

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Newman, R.C.; Roberge, R. & Bandy, R. April 1, 1982.

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Description

In late 1981, widespread leakage was encountered in Alloy 600 steam-generator tubing at the Three Mile Island Unit 1 nuclear power plant. The phenomenon was identified as low-temperature intergranular stress-corrosion cracking (SCC) initiated from the inner surfaces of the tubes exposed to the primary coolant. A testing program was initiated to examine the material and environmental factors relevant to these failures, which were found to be associated with sensitization of the material and contamination of the coolant by air and sodium thiosulfate. The test solutions contained 1.3% boric acid with various additions of sulfur compounds and lithium hydroxide. Constant extension rate testing was used as the primary tool to examine environmental effects such as the inhibition of cracking by lithium hydroxide. Important effects of crack-initiation frequency on the specimen potential (and therefore crack velocity) are demonstrated.

Physical Description

Pages: 24

Notes

NTIS, PC A02/MF A01; 1.

Source

  • ASTM conference on environment-sensitive fracture: evaluation and comparison of test methods, Washington, DC, USA, 1 Apr 1982

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  • Other: DE83011358
  • Report No.: BNL-NUREG-32798
  • Report No.: CONF-8204128-1
  • Grant Number: AC02-76CH00016
  • Office of Scientific & Technical Information Report Number: 6168778
  • Archival Resource Key: ark:/67531/metadc1108572

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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.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • April 1, 1982

Added to The UNT Digital Library

  • Feb. 22, 2018, 7:45 p.m.

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  • April 23, 2018, 4:03 p.m.

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Newman, R.C.; Roberge, R. & Bandy, R. Evaluation of SCC test methods for Inconel 600 in low temperature aqueous solutions, article, April 1, 1982; Upton, New York. (digital.library.unt.edu/ark:/67531/metadc1108572/: accessed November 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.