Effects of pH and stress intensity on crack growth rate in Alloy 600 in lithiated + borated water at high temperatures

Conference · Thu Dec 31 00:00:00 EST 1992

OSTI ID:48086

Rebak, R B; Szklarska-Smialowska, Z ^[1]; McIlree, A R ^[2]

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1. Ohio State Univ., Columbus, OH (United States)
2. E.P.R.I., Palo Alto, CA (United States)

Primary water stress corrosion cracking studies were performed on Alloy 600. Constant load tests were conducted at 330 and 350{degrees}C in solutions containing dissolved hydrogen, boric acid (0 < B < 1200 ppm) and lithium hydroxide (0 < Li < 10 ppm). In the PWR working conditions range, that is, 6.9 < pH < 7.4 (or 0.5 ppm < Li < 3.5), there is little effect of the solution pH on the intergranular crack growth rate (IGSCC). However, there is a strong influence of the stress intensity on the IGSCC. K{sub ISCC} {approx} 5-10 MPa{radical}m. Dissolution plays an important role in the IGSCC process.

• OSTI ID: 48086
• Report Number(s): CONF-910808-; TRN: 95:011517
• Resource Relation: Conference: 5. international symposium on environmental degradation of materials in nuclear power systems - water reactors, Monterey, CA (United States), 25-29 Aug 1991; Other Information: PBD: 1992; Related Information: Is Part Of Proceedings of the fifth international symposium on environmental degradation of materials in nuclear power systems - water reactors; PB: 995 p.
• Country of Publication: United States
• Language: English

Related Subjects

21 NUCLEAR POWER REACTORS AND ASSOCIATED PLANTS
36 MATERIALS SCIENCE
INCONEL 600
STRESS CORROSION
INTERGRANULAR CORROSION
CRACK PROPAGATION
STEAM GENERATORS
TUBES
PWR TYPE REACTORS
WATER CHEMISTRY
AQUEOUS SOLUTIONS
PH VALUE
STRESS INTENSITY FACTORS
BORIC ACID
LITHIUM HYDROXIDES
HYDROGEN