Radioactive Waste

Graver Technologies manufactures ion exchange and septa to enhance the performance of each phase of radwaste processing.

Engineered Filtration and Separation Solutions for Radioactive Waste Processing

Nuclear plants treat their liquid radwaste onsite. Many plants use a specialized radwaste treatment company to process the radwaste and several plants operate their own systems. Some of these original systems include Powdex® precoat vessels followed by ion exchange deep beds. Radwaste processors erect trains of small vessels containing some or all of the following: Granular Carbon, Cation exchange resin, Anion exchange resin, Mixed bed ion exchange, and a polishing cartridge filter housing. A few systems also include reverse osmosis. The standard cartridge filters are replaced in some cases with a specialty cartridge containing Graver Technologies radionuclide selective media. A Graver product is available to enhance the performance of each phase of radwaste processing.

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About Our Solutions for Radioactive Waste Processing

Provide simultaneous precoat filtration, deionization, and radionuclide reduction
Individual resins and mixed beds give excellent performance and longer run length
Radionuclide selective polishing cartridges achieve MDA water to allow reuse or discharge
Radionuclide selective granular media allows plants to tailor processing to their individual radwaste processing needs

Product Selection

Ecodex P-202-H High capacity powdered mixed bed
Aegis SS precoat septa Permits good precoat uniformity
Gravex GR 1-0 SG High capacity anion exchange resin
Gravex GR 2-0 SG High capacity cation exchange resin
Gravex GR 3-0 SG Stoichiometric mixed bed
Radex Sb 1000 Antimony selective granular media
Radex Cs FLIP & Co FLIP Cesium and Cobalt selective cartridges
Radex Cs Floc & Co Floc Powdered selective media
Radex GX182 Highly macroporous anion for cobalt reduction
Radex GX193 Macroporous cation for iron reductionGranular CarbonGAC for organic reduction prior to ion exchange

Frequenty Asked Questions

How often should gas turbine filters be replaced?

This depends on the environment and filter type; however, pre-filters are changed every 3–6 months, while final filters may bechanged once in a year or two. Monitoring pressure drop is key to determiningreplacement timing.

What factors affect the operating life of a gas turbine filter?

Here are some factors:

Ambient dustand pollution levels
Operatinghours and load
Pulse-cleaningfrequency, depending on the type
Humidity andmoisture
Filter mediaand design

How do I know when a filter needs to be changed?

Differential pressure across the filter is animportant aspect in this case. If it increases beyond the set threshold, thefilter may be clogged or need cleaning or replacement.

What is pressure drop and why does it matter?

Pressure drop is the resistance to airflow through afilter. A high-pressure drop reduces turbine efficiency and increases energycosts. Selecting low-resistance filters helps improve performance.