Power Generation

Porvair Filtration Group is proud to partner with both existing and future nuclear power generation facilities. By tailoring our filtration technologies to the distinct needs of each application, we consistently deliver solutions that meet the highest global standards for safety, quality, and performance.

We are exploring the best technical and economic solutions to maintain plant safety and equipment reliability on separation issues as varied as:

• Coolant loop filtration
• Containment venting and relief valve protection
• Spent fuel pond (fuel pool) water clean up
• Caesium removal
• AGR CO2 coolant line and vent clean up, including safety relief valve protection (SRV), pre and post dryer and bypass blowdown units
• HTGR He coolant cleanup
• Innovative fuel cleaning processes
• Package venting for spent fuel disposal
• General power generation asset protection

Sinterflo^® Septa Back-Flushable Filters

Porvair manufactures 316L stainless steel sintered wire mesh laminate filter Septa as well as full scale and complete backwash systems. We supply standard 1" and 2" diameter Septa, as well as custom diameters up to any length. These tubular filter elements are typically supplied in tube bundle assemblies for retrofit into existing pressure vessels.

Sinterflo® Septa provides a base structure for the uniform precoating of ion exchange resins as well as absolute filtration when used as a resin pre or post filter. Due to the high void volume throughout the filtration area, Septa is often used in high-energy air or liquid surge backwash systems.

Typical applications in nuclear Boiling Water Reactors (BWR), and Pressurised Water Reactors (PWR) would include:

• condensate polishing
• reactor water clean-up
• fuel pool / vacuums
• radwaste processing.

Sinterflo® Septa is designed to be a direct replacement for existing tubesheet configurations. Porvair also designs complete condensate systems to reduce particle transport, protecting steam generators, resin beds and other downstream equipment. Our back-flushable systems can be used with or without ion exchange precoat.

SMRs and AMRs

Porvair’s nuclear division is strongly positioned to support the development and operation of Small Modular Reactors (SMRs) and Advanced Modular Reactors (AMRs), with filtration technologies and engineering capabilities that directly address the environmental, safety, and process control challenges common to both traditional and next generation reactor designs.

We provide HEPA and pre filtration systems, metallic HEPA filters engineered for extreme operating conditions, and fully customised filtration and separation packages.

We also provide filtration solutions for cooling water, underwater vacuums, rotating equipment and general liquid separations.

These solutions are essential for maintaining the integrity of compact modular reactor architectures, where space efficiency, reliability and long-term maintainability are critical.

Our capability to engineer bespoke solutions from individual retrofit elements to fully packaged filtration systems, aligns naturally with the modular construction philosophy underpinning SMR and AMR designs. This allows us to tailor filtration architectures to specific reactor types, containment strategies, and balance of plant configurations.

Supported by extensive laboratory, testing, and materials development facilities, Porvair leverages advanced metallic and polymeric media technologies to meet the unique chemical, thermal, and radiological demands of emerging SMR concepts. This strengthens our role as a trusted engineering partner within the SMR supply chain.

Porvair’s engineered solutions are suitable for all major reactor classes, including Small Modular Light Water Reactors (SMR LWRs), High Temperature Gas Cooled Reactors (HTGRs), Molten Salt Reactors (MSRs), and Liquid Metal/Fast Neutron Reactors (LFRs/SFRs).

Porvair operates purpose-built design, manufacturing, and testing facilities in both the UK and the USA dedicated to our nuclear product range.

Porvair Filtration Group delivers advanced filtration solutions designed specifically for pressurised water reactors (PWRs). From the heart of the primary loop to the supporting systems of the secondary loop, our filters safeguard the purity of reactor coolant, protect critical components, and help maintain the stable, efficient operation of the nuclear steam supply system.

The filtration points illustrated - such as reactor coolant, seal water, chemical addition, and volume‑control system filters - highlight the essential role our technologies play in supporting reactor performance and long‑term reliability.

Across the secondary loop, Porvair’s filtration systems ensure clean, well‑conditioned water and steam for safe and dependable plant operations. Solutions for steam generator blowdown, makeup water treatment, condensate demineralisation, resin management, and downstream polishing provide plant operators with confidence in system integrity and efficiency.

By engineering robust, high‑quality filters for every critical stage of the PWR cycle, Porvair Filtration Group supports the nuclear industry with filtration expertise that enhances performance, safeguards equipment, and contributes to the safe operation of civil nuclear power stations.

Porvair Filtration Group designs and manufactures specialised filtration systems that support the demanding operating conditions of nuclear boiling water reactors (BWRs).

Drawing on decades of engineering expertise, Porvair provides highly engineered filter elements and housings that maintain the purity and reliability of critical fluid streams throughout the reactor system. These filters play essential roles in controlling contamination transport, protecting critical reactor components while achieving ALARA (as low as reasonably achievable) goals under both normal and transient operating conditions.

The diagram highlights the breadth of filtration applications used in nuclear reactor systems.

From reactor coolant filtration and chemical addition filters to condensate demineraliser prefilters, resin traps, and closed‑cycle cooling water filters, Porvair’s technologies are designed to manage particulates, corrosion products, and radioactive contaminants with precision and consistency. These solutions enable safe, efficient, and compliant operation, supporting the rigorous standards expected across the nuclear industry worldwide.