scholarly journals The role of time-dependent deformation in intergranular crack initiation of alloy 600 steam generator tubing material

1998 ◽  
Author(s):  
G.S. Was ◽  
K. Lian
Keyword(s):  
Crack Initiation ◽  
Steam Generator ◽  
Intergranular Crack ◽  
Time Dependent ◽  
Alloy 600 ◽  
Steam Generator Tubing ◽  
Tubing Material

A Review of Alloy 600 Cracking in Operating Nuclear Plants Including Alloy 82 and 182 Weld Behavior

2004 ◽  
Author(s):  
Warren Bamford ◽  
John Hall
Keyword(s):  
Weld Metal ◽  
Base Metal ◽  
Steam Generator ◽  
Structural Integrity ◽  
Reactor Vessel ◽  
Alloy 600 ◽  
Control Rod ◽  
Nuclear Plants ◽  
Steam Generator Tubing ◽  
Long Time

Service induced cracking in Alloy 600 has been known for a long time, having been first observed in the 1980’s in steam generator tubing and small bore piping, and later, in 1991, in reactor vessel control rod drive mechanism (CRDM) head penetrations. Other than steam generator tubing, which cracked within a few years of operation, the first Alloy 600 cracking was in base metal of Combustion Engineering small bore piping, followed closely by CE pressurizer heater sleeves. The first reactor vessel CRDM penetrations (base metal) to crack were in France, US plants found CRDM cracking several years later. Three plants have discovered weld metal cracking at the outlet nozzle to pipe weld region. This was the first known weld metal cracking. This paper will chronicle the development of service-induced cracking in these components, and compare the behavior of welds as opposed to base metal, from the standpoint of time to crack initiation, growth rate of cracks, and their impact on structural integrity. In addition, a discussion of potential future trends will be provided.

IGSCC Behavior of Alloy 600 Steam Generator Tubing in Water or Steam Tests Above 360 C

CORROSION ◽  
1987 ◽  
Vol 43 (12) ◽  
pp. 727-734 ◽  
Author(s):  
G. Economy ◽  
R. J. Jacko ◽  
F. W. Pement
Keyword(s):  
Steam Generator ◽  
Alloy 600 ◽  
Steam Generator Tubing

Selection of Steam Generator Tubing Material for the Westinghouse LMFBR Demonstration Plant

1971 ◽  
Vol 11 (2) ◽  
pp. 222-231 ◽  
Author(s):  
W. E. Ray ◽  
S. L. Schrock ◽  
S. A. Shiels ◽  
K. C. Thomas
Keyword(s):  
Steam Generator ◽  
Steam Generator Tubing ◽  
Demonstration Plant ◽  
Selection Of ◽  
Tubing Material

Effect of Boric Acid on Pit Growth in Alloy 600 Steam Generator Tubing

CORROSION ◽  
1992 ◽  
Vol 48 (2) ◽  
pp. 103-113
Author(s):  
G. S. Was ◽  
D. Choi
Keyword(s):  
Boric Acid ◽  
Steam Generator ◽  
Alloy 600 ◽  
Steam Generator Tubing

Microstructure and Microdeformation Effects on IGSCC of Alloy 600 Steam Generator Tubing

CORROSION ◽  
1988 ◽  
Vol 44 (11) ◽  
pp. 782-788 ◽  
Author(s):  
S. M. Bruemmer ◽  
L. A. Charlot ◽  
C. H. Henager
Keyword(s):  
Steam Generator ◽  
Alloy 600 ◽  
Steam Generator Tubing

Pitting of steam-generator tubing alloys in solutions containing thiosulfate and sulfate or chloride

2015 ◽  
Vol 180 ◽  
pp. 233-249 ◽  
Author(s):  
William Zhang ◽  
Anatolie G. Carcea ◽  
Roger C. Newman
Keyword(s):  
Steam Generator ◽  
Concentration Ratio ◽  
Alloy 600 ◽  
Alloy Component ◽  
Sulfate Solutions ◽  
Steam Generator Tubing ◽  
Thiosulfate Concentration

The pitting of nuclear steam generator tubing alloys 600, 690 and 800 was studied at 60 °C using dilute thiosulfate solutions containing excess sulfate or (for Alloy 600) chloride. A potentiostatic scratch method was used. In sulfate solutions, all alloys pitted at low potentials, reflecting their lack of protective Mo. The alloys demonstrated the most severe pitting at a sulfate : thiosulfate concentration ratio of ∼40. Alloy 600 pitted worst at a chloride : thiosulfate ratio of ∼2000. The results are interpreted through the mutual electromigration of differently charged anions into a pit nucleus, and differences in the major alloy component.

scholarly journals Effect of oxide film on ECT detectability of surface IGSCC in laboratory-degraded alloy 600 steam generator tubing

2019 ◽  
Vol 51 (5) ◽  
pp. 1381-1389
Author(s):  
Tae Hyun Lee ◽  
Kyung Ha Ryu ◽  
Hong Deok Kim ◽  
Il Soon Hwang ◽  
Ji Hyun Kim ◽  
...  
Keyword(s):  
Oxide Film ◽  
Steam Generator ◽  
Alloy 600 ◽  
Steam Generator Tubing
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