Characterization of damage and triboparticles resulting from fretting of Incoloy 800 steam generator tubes against different materials

Wear ◽  
2017 ◽  
Vol 390-391 ◽  
pp. 198-208 ◽  
Author(s):  
S.R. Soria ◽  
A. Tolley ◽  
A. Yawny
Keyword(s):  
Steam Generator ◽  
Incoloy 800 ◽  
Steam Generator Tubes

Expert system for the characterization of defect signals in steam generator tubes

1995 ◽  
Vol 8 (3) ◽  
pp. 309-318 ◽  
Author(s):  
B. Benoist ◽  
P. Gaillard ◽  
M. Pigeon ◽  
P. Morizet-Mahoudeaux
Keyword(s):  
Expert System ◽  
Steam Generator ◽  
Steam Generator Tubes

Characterization and Structural Integrity Tests of Ex-Service Steam Generator Tubes

2008 ◽  
Author(s):  
Sandra Pagan ◽  
Xinjian Duan ◽  
Michael J. Kozluk ◽  
Brian Mills ◽  
Guylaine Goszczynski
Keyword(s):  
Mechanical Properties ◽  
Power Generation ◽  
Steam Generator ◽  
Structural Integrity ◽  
Incoloy 800 ◽  
Full Power ◽  
Monel 400 ◽  
Integrity Tests ◽  
Steam Generator Tubes

Canadian nuclear standard CSA N285.4 requires the periodic metallurgical examination of removed ex-service steam generator tubes. This paper describes the practices used for the characterization and structural integrity tests of ex-service steam generator tubes at Ontario Power Generation (OPG). It shows that there is no degradation in mechanical properties of Monel 400 tubes after 7 to 18 Effective Full Power Years (EFPY) of operation and Incoloy 800 tubes after more than 10 EFPY of operation.

Corrosion Process of Incoloy-800 in High Pressure and Temperature Aqueous Environment

2008 ◽  
Vol 59 (9) ◽  
Author(s):  
Dumitra Lucan ◽  
Manuela Fulger ◽  
Gheorghita Jinescu
Keyword(s):  
Corrosion Behaviour ◽  
Gravimetric Method ◽  
Corrosion Process ◽  
Aqueous Environment ◽  
Accelerated Tests ◽  
Steam Generators ◽  
High Pressure And Temperature ◽  
Eds Analysis ◽  
Incoloy 800 ◽  
Steam Generator Tubes

The Steam Generators (SG), equipment that ensures the connection between the primary and secondary circuits, creates several safety problems during operation, mainly due to corrosion and mechanical damages. To provide information about the corrosion behaviour of the structural materials from CANDU SG under normal and abnormal conditions of operation and to identify the failure types produced by the corrosion were performed corrosion experiments consisting in chemical accelerated tests, static autoclaving and electrochemical methods. The gravimetric method, optical metallographic microscopy, XRD and EDS analysis, as well as electrochemical measurements have been used to evaluate the corrosion behavior of the steam generator tubes material (Incoloy-800).

Parametric Study of External Pressure on Steam Generator Tube Bends

2012 ◽  
Author(s):  
Mitch Hokazono ◽  
Clayton T. Smith
Keyword(s):  
Steam Generator ◽  
Parametric Study ◽  
External Pressure ◽  
Light Water Reactor ◽  
Material Strength ◽  
Steam Generators ◽  
Elliptical Cross ◽  
Light Water ◽  
Water Reactor ◽  
Steam Generator Tubes

Integral light-water reactor designs propose the use of steam generators located within the reactor vessel. Steam generator tubes in these designs must withstand external pressure loadings to prevent buckling, which is affected by material strength, fabrication techniques, chemical environment and tube geometry. Experience with fired tube boilers has shown that buckling in boiler tubes is greatly alleviated by controlling ovality in bends when the tubes are fabricated. Light water reactor steam generator pressures will not cause a buckling problem in steam generators with reasonable fabrication limits on tube ovality and wall thinning. Utilizing existing Code rules, there is a significant design margin, even for the maximum differential pressure case. With reasonable bend design and fabrication limits the helical steam generator thermodynamic advantages can be realized without a buckling concern. This paper describes a theoretical methodology for determining allowable external pressure for steam generator tubes subject to tube ovality based on ASME Section III Code Case N-759-2 rules. A parametric study of the results of this methodology applied to an elliptical cross section with varying wall thicknesses, tube diameters, and ovality values is also presented.

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