Results 231 to 240 of about 867,433 (284)
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Flaw analysis in steam generator tubes
International Journal of Pressure Vessels and Piping, 1986Abstract This paper presents the flaw assessment programme undertaken in France for PWR steam generator tubes affected by stress corrosion cracking. Failure criteria were deduced from burst tests on various crack configurations. Stresses and critical crack sizes were estimated for all operating conditions.
J.-P. Hutin, F. Billon
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Damping of Steam Generator Tubes
Flow-Induced Vibration, 2003The flow-induced vibration (FIV) analysis is one of the most critical evaluations needed to ensure long-term operation of steam generator. Original design hardware is usually based on experience and testing. Performance changes, such as an increase in power with increased feedwater flow, or tube repairs including plugs, stabilizers, and sleeves are ...
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Selection of Tube Samples for Inservice Inspection of Steam Generator Tubes
Volume 7: Operations, Applications, and Components, 2005In Pressurized Water Reactors, a program of periodic inservice inspection of steam generator tubes is set up to monitor the integrity of the tubes. The inservice inspection is performed using nondestructive examination techniques, e.g., eddy current testing.
Guy Roussel, Leon Cizelj
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Factors Affecting Steam Generator Tube Bow
Volume 3: Design and Analysis, 2013One of the challenges in straight shell-and-tube Steam Generator design is to avoid the tube to tube wear that can arise during operation due to higher than anticipated compressive tube loads and the resulting tube bow that can occur. Tube bow becomes significant when the compressive load in the tube exceeds its critical buckling capacity.
Moli Cao +3 more
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Cracking in a Steam Generator U-Tube
2019Abstract A rupture of a thirty-year-old U-tube on a steam generator for a closed-cycle pressurized-water nuclear power plant occurred, resulting in limited release of reactor water. A typical tube bundle can be over 9 m (30 ft) tall and 3 m (10 ft) in diam with over 3,000 22-mm (7/8-in.) diam Inconel Alloy 600 tubes. Tube support plates (
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Intergranular Fracture of Steam Generator Tubes
2019Abstract A power plant using two steam generators (vertical U-tube and shell heat exchangers, approximately 21 m (68 ft) high with a steam drum diameter of 6 m (20 ft)) experienced a steam generator tube rupture. Each steam generator contained 11,012 Inconel alloy 600 (nickel-base alloy) tubes measuring 19 mm OD, nominal wall thickness ...
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Steam generator tube vibration tests
Nuclear Engineering and Design, 1985Abstract The buildup of magnetite in the steam generators of some pressurized water reactors had led operators to propose chemical cleaning to remove this product. In some cases, the volume of magnetite formed by the corrosion of the carbon steel has been sufficient to cause “denting” or reduction of the outer diameter of the tubes where they pass ...
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Reliability of Steam Generator Tubes With Axial Cracks
Journal of Pressure Vessel Technology, 1996An approach for estimating the failure probability of tubes containing through-wall axial cracks has already been proposed by the authors. It is based on probabilistic fracture mechanics and accounts for scatter in tube geometry and material properties, scatter in residual and operational stresses responsible for crack propagation, and characteristics ...
L. Cizelj, B. Mavko, P. Vencelj
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Vibration Damping of Stabilized Steam-Generator Tubes
Volume 4: Fluid Structure Interaction, 2005The integrity of steam-generator tubes is an important aspect of the long-term reliable operation of nuclear power plants. In situations where a tube is judged to be at risk, it must be either plugged, or removed, or reliably stabilized in some manner to avoid excessive motion of the tube due to flow-induced vibration.
V. P. Janzen +3 more
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Development of stabilizers for steam generator tube repair
Nuclear Engineering and Design, 1987Abstract Fluidelastic stability, turbulence-induced and vortex-induced vibration analysis of different types of stabilizers for repairing steam generator tubes are presented. The performances of the different designs are compared with that of a common basis — the virgin tube.
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