SLUDGE-REDUCTION STEAM GENERATOR AND METHOD FOR MANUFACTURING TUBE PLATE OF SLUDGE-REDUCTION STEAM GENERATOR
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United States of America Patent
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Dec 17, 2015
app pub date -
Feb 22, 2012
filing date -
Feb 15, 2012
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Abstract
A sludge-reduction steam generator and a method for manufacturing a tubular plate for same, which can effectively remove sludge deposits from the inside of a steam generator of a pressurized light water reactor. The sludge-reduction steam generator comprises a plurality of U-shaped heat transfer pipes and one or more tubular plates coupled to the heat transfer pipes provide support thereto. The heat transfer pipes are disposed so that heat-exchange hot water flows in a pressure container. The tubular plates are coated with a ceramic material having the same surface electro-kinetic polarity as iron corrosion products in a predetermined range. This prevents the fixation of deposits on the surfaces of the tubular plates by inducing electrically repulsive power on the surfaces of the tubular plates with respect to the deposits and facilitates the removal of the deposits precipitated on the surfaces of the tubular plates by reducing surface friction force.
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