Tests with Inconel 600 to obtain quantitative stress-corrosion cracking data for evaluating service performance. [PWR]

Conference · Wed Sep 01 04:00:00 EDT 1982

OSTI ID:6628803

Bandy, R; van Rooyen, D

Inconel 600 tubes in pressurized water reactor (PWR) steam generators form a pressure boundary between radioactive primary water and secondary water which is converted to steam and used for generating electricity. Under operating conditions the performance of alloy 600 has been good, but with some occasional small leaks resulting from stress corrosion cracking (SCC), related to the presence of unusually high residual or operating stresses. The suspected high stresses can result from either the deformation of tubes during manufacture, or distortion during abnormal conditions such as denting. The present experimental program addresses two specific conditions, i.e., (1) where deformation occurs but is no longer active, such as when denting is stopped and (2) where plastic deformation of the metal continues, as would occur during denting. Laboratory media consist of pure water as well as solutions to simulate environments that would apply in service; tubing from actual production is used in carrying out these tests. The environments include both normal and off chemistries for primary and secondary water. The results reported here were obtained in several different tests. The main ones are (1) split tube reverse U-bends, (2) constant extension rate tests (CERT), and (3) constant load. The temperature range covered is 290 to 365/sup 0/C.

• Research Organization: Brookhaven National Lab., Upton, NY (USA)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 6628803
• Report Number(s): BNL-NUREG-31814; CONF-821037-39; ON: DE83002102
• Country of Publication: United States
• Language: English

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ALLOYS
BOILERS
CHEMICAL REACTIONS
CHEMISTRY
CHROMIUM ALLOYS
CORROSION
CRACKS
DEFORMATION
INCONEL 600
INCONEL ALLOYS
IRON ALLOYS
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NICKEL ALLOYS
NICKEL BASE ALLOYS
NIOBIUM ALLOYS
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REACTOR MATERIALS
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STEAM GENERATORS
STRESS CORROSION
TUBES
VAPOR GENERATORS
WATER CHEMISTRY
WATER COOLED REACTORS
WATER MODERATED REACTORS