Spent Fuel Pool Filtration

Graver Technologies engineers effective ion exchange and filtration technologies for fuel pool management.

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Types of Nuclear Fuel Pool Filter Solutions Offered by Graver Technologies

Graver Technologies provides comprehensive nuclear spent fuel pool filtration systems engineered specifically for the demanding requirements of nuclear facilities. Our extensive product portfolio addresses diverse operational needs through specialized filtration technologies.

  1. GRAVEX® High-Capacity Nuclear Grade Resins: These Gravex Nuclear Grade Ion exchange resins are very high-capacity polystyrene, gel-type resins that have been regenerated and processed to provide the highest possible performance in nuclear applications. The GR-3-16 NG (H/OH) mixed bed resin offers exceptional chemical and physical resistance to aggressive spent fuel pool environments, while GR-2-16 NG provides enhanced particle size characteristics that resist separation and limit potential cation settlement in vessel bottoms. The particle size of the GR-2-16 NG cation component further enhances resistance to separation, limiting the potential for a bottom layer of cation exchange resin in the vessel.
  2. Aegis® PowerGuard® Septa: Graver Aegis PowerGuard Septa and specialty strainers are multilayer composites of selected wire cloths, perforated sheets and fiber metal felts permanently bonded together through a diffusion process. These stainless steel filtration elements provide superior strength and abrasion resistance for critical nuclear applications, including fuel pool filters, offering precise pore size control from 1 to 200 microns. PowerGuard Septa is the best choice for critical applications including condensate, polishing, radioactive waste, nuclear reactor water cleanup (RWCU) and fuel pool filters in either new construction or retrofits.
  3. Ecodex (P-201-H and P-202-H): Ecodex precoat products are homogeneous mixtures that combine inert microfine fibers with two powdered ion exchange resins: strongly acidic Powdex cation and strongly basic Powdex anion resins. The P-201-H formulation provides a balanced 1:1 fiber-to-resin ratio for optimal filtration performance, while P-202-H offers enhanced resin content with a 1:2 fiber-to-resin ratio for applications requiring increased ion exchange capacity. Continuous cleaning and filtration with Ecodex P-201-H or P-202-H maintains fuel pool parameters.

Key Features of Nuclear Fuel Pool Filters

Our nuclear fuel pool water treatment solution incorporate advanced engineering principles to deliver superior performance in the most demanding nuclear environments.

  • Highly Stable Specialty Nuclear Grade Mixed Bed: The specialty nuclear grade mixed bed resins help control sulfate levels in the spent fuel pool. This ensures that the water remains free of contaminants that could potentially harm the pool’s water quality. The stability of these resins ensures long-lasting performance under harsh radioactive conditions.
  • Simultaneous Deionization and Radionuclide Reduction: The filters deionize and reduce radionuclides simultaneously, maintaining excellent water clarity in nuclear cooling pools. The dual-action filtration is designed to provide high levels of contaminant removal while also ensuring that the water quality remains clear and safe for the long-term storage of spent nuclear fuel.
  • High Capacity and Ion Exchange Efficiency: Graver Technologies’ filters use advanced resins with high capacity for ion exchange, allowing them to remove contaminants and radionuclides from nuclear fuel pool water effectively. This capacity ensures that spent fuel pool water remains safe and clear, meeting the stringent standards required for nuclear reactor pool filters.
  • Durability and Radiation Resistance: Graver fuel pool filters are designed to operate effectively in high-radiation environments. These filters are built to last and resist degradation due to exposure to radioactive materials, ensuring the long-term reliability of the nuclear fuel pool filtration system.
Filtration and separation technology for fuel pools

Critical Filtration and Separation Technology for Fuel Pools

At approximately 12, 18, or 24 month intervals each nuclear plant schedules a refueling outage to replace a portion of the nuclear fuel. The spent or used fuel still generates heat and radiation and must be handled and stored safely. The fuel assemblies that have been removed from the reactor are stored under water in the Spent Fuel Pool. Good water quality is important to prevent degradation and help maintain the integrity of the spent fuel assemblies. Spent Fuel Pool ion exchange systems—either Powdex® pre-coat systems or deep beds—are used in many plants. Graver provided the original Powdex resins for the pre-coat systems and today most use one of the Ecodex® mixed bed precoat products to simultaneously deionize and filter particulates, maintaining good clarity in the pool. Gravex® bead resins are particularly useful in the deep bed systems. Typical mixed beds were used for many years and are still useful today. The Spent Fuel Pool environment can affect resin degradation so we recommend a specialty Gravex mixed bed containing a high capacity, more stable cation.

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Filtration and separation technology for fuel pools

About Our Filtration and Separation Technology for Fuel Pools

  • Highly stable specialty nuclear grade mixed bed helps control sulfate levels in the Spent Fuel Pool
  • Simultaneously deionize and reduce radionuclides while providing excellent filtration.  Excellent water clarity.
  • Integrally designed to work with all pre-coat filtration systems and especially the Powdex pre-coat systems

Product Selection

  • Gravex GR 3-16 NG (H/OH)Specialty Nuclear Grade mixed bed with high capacity cation
  • Gravex GR 3-9 NG (H/OH)Nuclear Grade mixed bed
  • Aegis PowerGuard Special SS filters to hold up to the environment
  • Ecodex P-201-H Powdered mixed bed precoat with fiber
  • Ecodex P-202-H Powdered mixed bed precoat with fiber

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Consler® PME/KME Series Exhaust Separators

Frequently Asked Questions

How do Graver’s spent fuel storage pool filtration systems work?

Graver spent fuel storage pool filtration by utilizing high-capacity nuclear grade resins, ion-exchange resins, and stainless steel septa to remove contaminants and maintain water clarity in spent fuel pools.

How often should spent fuel pool filters be replaced or maintained?

Spent fuel pool filters should be maintained and replaced periodically based on operational conditions, pool water quality, and the manufacturer’s recommendations to ensure optimal performance.

What is the difference between fuel pool filtration and reactor water cleanup?

Fuel pool filtration focuses on cleaning and purifying water in spent fuel pools, while reactor water cleanup targets the cleaning of water in the reactor circuit, which involves different systems and requirements.

Can Graver fuel pool filters handle high-radiation environments?

Yes, Graver fuel pool filters are specifically designed to function effectively in high-radiation environments, ensuring durability and long-term performance in nuclear settings.

Are these filters compatible with existing nuclear plant filtration systems?

Yes, Graver’s fuel pool filters are compatible with most existing nuclear plant filtration systems and can be integrated seamlessly into current operations.

Do Fuel Pool Filtration systems meet nuclear safety and regulatory standards?

Yes, Graver Technologies’ fuel pool filtration systems comply with nuclear safety standards and regulatory requirements to ensure safe and effective filtration in nuclear power plants.

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