Results 101 to 110 of about 177 (158)

Economics of Feedwater Heater Replacement

Journal of Engineering for Power, 1977
As feedwater heaters age, performance deteriorates and leaks invariably occur. In order to keep the heater functioning properly, and to avoid the possibility of water backing into the turbine and causing damage, the leaking tubes are plugged. Usually, the initially plugged tubes cause small, if any, deterioration of performance.
T. H. Fehring, R. A. Gaggioli
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Corrosion Related Failures in Feedwater Heaters

CORROSION 1984, 1984
Abstract Five classes of materials are in common use in feedwater heaters; Admiralty and other brasses, Cu-Ni alloys, MONEL® Alloy 400, C-steel and stainless steels. The frequency of failure and failure modes vary from one class of these materials to the next.
J. A. Beavers, A. K. Agrawal, W. E. Berry, B. C. Syrett   +3 more
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Wolf Creek Feedwater Heater Repair

2002 International Joint Power Generation Conference, 2002
Since 1990, an increasing number of the 304 SST feedwater heater tubes in the number 1 and 2 feedwater heaters (six heaters total) at the Wolf Creek Nuclear Power Plant have experienced failure due to fretting wear within the drain cooler region. Tube damage was due to thin end plate design resulting in tube wear at the end plate and support plate ...
Bruce W. Schafer, Stan Wahlmeier
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Managing Feedwater Heater Shell Thinning

10th International Conference on Nuclear Engineering, Volume 1, 2002
Thinning of feedwater heater (FWH) shells has become an important issue throughout the U.S. nuclear industry. The thinning occurs primarily in the vicinity of the extraction steam and drain inlet nozzles where two-phase steam/water mixtures enter the heater.
John W. Simons, Robert B. Keating
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Early Detection of Feedwater-Heater Leaks

Journal of Engineering for Gas Turbines and Power, 1996
This work describes a method of early detection of feedwater heater leaks. The method uses existing pressure, temperature, and flow measurements. The four leak indicators found were feedwater flow rate, drain temperature, drain cooler approach, and extraction line pressure drop. Deviations from normal operation were plotted for each of these indicators.
E. Hansen, R. Godwin, D. Wood, L. Turner
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Development of a feedwater heater expert system

IEEE Proceedings on Southeastcon, 2002
An effort to develop an expert system dealing with failure cause analysis in closed feedwater heaters is described. The development of the prototype system is summarized, and the way in which it can be used to assist plant personnel in determining the cause of a tube failure in a feedwater heater is illustrated.
R.L. King, C. Farnham, J. Hollingsworth
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Area allocation in multi-zone feedwater heaters

Energy Conversion and Management, 2007
A numerical method of analyzing closed system feedwater heaters is presented. The numerical results are validated using data generated from the classical log mean temperature difference (LMTD) method. It is found that the numerical results are very close (±1%) to the ones predicted by the LMTD method.
Irfan S. Hussaini, Syed M. Zubair, M.A. Antar   +2 more
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Shell and Plate Feedwater Heater Prototype Test

Volume 1: Fuels and Combustion, Material Handling, Emissions; Steam Generators; Heat Exchangers and Cooling Systems; Turbines, Generators and Auxiliaries; Plant Operations and Maintenance; Reliability, Availability and Maintainability (RAM); Plant Systems, Structures, Components and Materials Issues, 2014
Westinghouse Electric Company and Tranter Inc. are collaborating to develop the modular, low-pressure horizontal shell and plate feedwater heater (SPFWH™) heat exchanger product. This design utilizes easily removable modules of welded heat transfer plates within a pressure vessel instead of traditional tubes as the pressure boundary and heat transfer ...
Creed Taylor, Rhorn John, Jason L. Williams   +2 more
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Performance of MONEL Alloy 400 in Feedwater Heaters

Journal of Engineering for Power, 1973
With access to data on more than thirty years service experience with MONEL alloy 400 tubing in high-pressure feedwater heaters, the Huntington Alloy Products Division conducted an extensive laboratory investigation on mechanisms and corrodents contributing to stress-corrosion cracking in this application.
D. W. Rahoi, R. C. Scarberry, J. R. Crum, P. E. Morris   +3 more
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Feedwater Heaters—A User’s Viewpoint

Journal of Fluids Engineering, 1956
Abstract Correct heating surface and the proper terminal approach are necessary requirements for efficient plant performance. However, the most important factors from the user’s standpoint are those which make for continuous trouble-free operation. These include such requirements as suitable material protection against direct impingement
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