DOW Introduces DOWEX MONOSPHERE 1400PC Cation Resin For PWR Nuclear Power Plants
New technology helps boost plant sustainability and reliability
Dow Water & Process Solutions (DW&PS), a business unit of The Dow Chemical Company, has introduced DOWEX MONOSPHERE 1400PC Cation Resin for Pressurized Water Reactor (PWR) nuclear power plants. Launched at the 2013 Electrical Power Research Institute (EPRI), this new high capacity cation resin was designed to help strengthen plant reliability by minimizing anion resin kinetic degradation associated with the use of ethanolamine (ETA) which is used to minimize flow-assisted corrosion (FAC) and iron transport within the secondary water systems.
PWR plants can experience extremely small condenser leaks that are nearly impossible to locate and repair and yet introduce contamination at levels that cannot be tolerated within the steam generator guideline targets. In order to maintain full power operation in these scenarios, the plants must operate their condensate polishers. Although the use of ETA minimizes FAC and iron transport, this chemistry causes degradation of anion resin kinetics in the mixed bed condensate polishers, making it difficult to meet guideline targets for sulfate in steam generators. As a result, many plants have resorted to using extra polisher maintenance procedures, such as hot water rinsing, partial exchange of the anion resin and frequent mass transfer coefficient (MTC) testing to keep acceptable polisher effluent sulfate levels.
“DOWEX MONOSPHERE 1400PC is the first resin to specifically address the problems associated with ETA in condensate polishers. It delivers high-quality water to the steam generator for uninterrupted power production,” remarks Bill Carlin, industrial/power technical service specialist for Dow Water & Process Solutions.
The performance of DOWEX MONOSPHERE 1400PC was proven in a recent trial at Diablo Canyon Nuclear Power Plant in Avila Beach, California, which was experiencing rapid kinetic impairment of the anion resin. A test bed of DOWEX MONOSPHERE 1400PC cation resin combined with AMBERJET 9000 OH anion resin, was installed at the plant. The test bed was able to maintain stable, acceptable anion resin kinetics (MTC) and sulfate effluent performance in a PWR mixed bed condensate polisher where ETA was used as the neutralizing amine. This was accomplished without the need for special hot water rinsing or partial exchange of the anion resin in the test bed.
DOWEX MONOSPHERE 1400PC provides a significant new tool to help facilitate sustainable full flow condensate polisher operation. The new DOWEX MONOSPHERE 1400PC can also be paired with the DOWEX MONOSPHERE 550A anion resin for use in PWR mixed bed condensate polishers.
About Dow Water & Process Solutions
The global leader in sustainable separation and purification technology, Dow Water & Process Solutions is making a clear impact in the world. We’re helping to make water safer and more accessible, food taste better, pharmaceuticals more effective and industries more efficient and spearheading the development of sustainable technologies that integrate water and energy requirements. Dow Water & Process Solutions offers a broad portfolio of ion exchange resins, reverse osmosis membranes, ultrafiltration membranes, fine particle filters and electrodeionization products, with strong positions in a number of major application areas, including industrial and municipal water, industrial processes, pharmaceuticals, power, residential water and waste and water reuse. For more information, visit www.dowwaterandprocess.com.
Dow combines the power of science and technology to passionately innovate what is essential to human progress. The Company connects chemistry and innovation with the principles of sustainability to help address many of the world's most challenging problems such as the need for clean water, renewable energy generation and conservation, and increasing agricultural productivity. Dow's diversified industry-leading portfolio of specialty chemical, advanced materials, agrosciences and plastics businesses delivers a broad range of technology-based products and solutions to customers in approximately 160 countries and in high growth sectors such as electronics, water, energy, coatings and agriculture. In 2012, Dow had annual sales of approximately $57B and employed approximately 54,000 people worldwide. The Company's more than 5,000 products are manufactured at 188 sites in 36 countries across the globe. References to "Dow" or the "Company" mean The Dow Chemical Company and its consolidated subsidiaries unless otherwise expressly noted. For more information, visit www.dow.com.