Reactor Water Cleanup

Graver Technologies provides a range of ion exchange and septa technologies to yield an economical filtration and purification solution for reactor water cleanup.

Superior Performance Ion Exchange Resins and Septa for Reactor Water Cleanup Systems

The Reactor Water Cleanup (RWCU) system in a BWR plant is used to remove contaminants from the reactor water. Powdex® precoat systems are installed in many plants, and ion exchange deep beds are used in others. The reactor water is cooled, treated by the RWCU system, and returned to the recirculation system. High-quality Ecodex® or Powdex products are precoated and provide simultaneous filtration and deionization. Gravex® Nuclear Grade resins may be used in the deep beds.

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About Our Ion Exchange Resins

Low leachables
Precoatable filter septa for the best precoat performance
Ultra low chloride limits leachable chlorides and spiking in the reactor
Mixed bed with high crosslinked cation for higher capacity and greater stability

Product Selection

Ecodex P-205-H High capacity powdered mixed bed
Powdex Premix 22H, 42H Excellent filtration, powdered mixed beds
Powdex PAO with PCH Precoatable powdered cation & anion
PowerGuard Precoat Septa Backwashable metallic septa
Gravex GR 1-9 US Ultra (OH) Nuclear Grade Ultra low chloride anion
Gravex GR 2-0 NG (H) Nuclear Grade cation- Gravex GR 3-9 NG (H/OH) Nuclear Grade mixed bed
Gravex GR 3-16 NG (H/OH) Nuclear Grade mixed bed with high capacity cation

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.