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Condensate Polishing For Nuclear And Super Critical Power Plants For The 21st Century (.pdf)
. vessels. Figure 2.0 is a simplified version of a. These resins have a much narrower particle size. two- (2) vessel regeneration system. The system. distribution than prior grades used for. employs a state-of-the-art bottom resin transfer. condensate polishing and have become the. system that provides
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Innovative Resin Technologies for World Class PWR Chemistry Operations (.pdf)
available for many years. These anion resins are. commonly classified as Nuclear Grade and many nuclear plant specifications invoke this requirement. Products meeting this low chloride level are generally available from most reputable ion exchange. suppliers and manufacturers. As condensate polishing
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Felt Seals
then penetrate into the felt. Thus, they protect surfaces by polishing them rather than scoring them. The usual temperature limits of felt seals are -60 to 250 F. However, synthetic-fiber felts offer a wide range of strength and chemical resistance at temperatures up to 400 F. Felt seals
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Precise Control of Dissolved O2 and N2 (.pdf)
There is a trend in the semiconductor industry for precise control of oxygen and nitrogen concentrations in ultrapure water. Specifically there is a goal in the polishing loop of a semiconductor plant to control dissolved oxygen to low levels of 1 ppb or 5 ppb. At the same time it is important
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Next-generation plastics let wafers fly through manufacturing
help get silicon wafers through the fab line quickly with less consumable costs and fewer defects per wafer. OEMs and fabs want to reduce the cost per wafer so they are looking for longer life and/or low-cost components. Chemical-mechanical planarization (CMP) is a highly accurate polishing process
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MICRO: Confronting the realities of UHP system construction in developing countries
and crevice free jointments for smaller diameters. The materials and design of high-purity liquid chemical distribution systems matured, as purer polymers were developed and the pulsation dampening of filtration media, continuous polishing circuits, and on-site blending were introduced. In the late
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More metal parts go to composites
solutions, and the need for faster throughput are pushing the mechanical and physical limits of metals and ceramic components used in wafer handling, etching, and polishing. So says Bill Sproesser, development programs manager for This has prompted designers to look at alternative materials
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Banging out balls
Modern servocontrols help finishing machines produce golf balls faster than ever before. An as-molded ball sitting in the mold lower half shows the small (0.040-in. tall) protrusions about its equator. The protrusions are purposely put there for alignment in ball polishing machines. The CNC Seam