The UK Has Four Nuclear Programmes Running Simultaneously. Here Is Why FRP Is the Secondary Infrastructure Material All of Them Need.

The UK nuclear industry is simultaneously decommissioning its legacy fleet, extending the life of its operating reactors, building Hinkley Point C, and preparing to construct the first small modular reactors at Wylfa. Across all four of those programmes, the secondary infrastructure challenge is the same: materials that perform without maintenance in environments where access is hazardous, contamination risk is real, and the consequences of infrastructure failure are unacceptable. FRP is one of the most important answers available.

Published by Reinforce Technology  |  April 2026

On 15 April 2026, Rolls-Royce SMR and Great British Energy–Nuclear signed the contract that formally begins construction preparation work at the Wylfa site in North Wales — the starting gun for the UK's first small modular reactor programme, backed by £2.6 billion in the 2025 Spending Review and up to £599 million from the National Wealth Fund (ANS Nuclear Newswire, 2026). At the same time, the Nuclear Decommissioning Authority is progressing its 2026 to 2029 Business Plan across 17 nuclear sites, with Hunterston B transferring to Nuclear Restoration Services for long-term decommissioning from April 2026, Hinkley Point B and further AGR stations to follow, and the Sellafield programme continuing its decades-long mission to reduce the UK's highest nuclear hazards (NDA, 2026).

In March 2026, the government published its response to the Nuclear Regulatory Review — accepting all 47 recommendations — and committed to completing all regulatory reform by end of 2027, streamlining planning and designating nuclear as a critical national priority. The Advanced Nuclear Framework, published in February 2026, established clear pathways for privately funded advanced reactor projects (GOV.UK, 2026). The UK nuclear sector, in short, is simultaneously operating in four distinct infrastructure modes: decommissioning, life extension, new large-scale build, and SMR development — all at once, all under the highest safety and quality standards of any industrial sector.

Each of these programmes requires secondary infrastructure — walkway platforms, access grating, cable trays, cable management, handrails, fencing, and structural profiles — that must perform in environments where radioactive contamination, chemical exposure, elevated humidity, and the ever-present constraint of minimising personnel access time in radiation zones create material demands that no other industry matches. FRP (Fibre Reinforced Polymer) has been evaluated for nuclear applications by nuclear organisations in the UK, Europe, and North America, and its properties — corrosion immunity, non-conductivity, low natural radioactivity, radiation tolerance, and non-magnetic character — address the specific demands of the nuclear environment in ways that steel and aluminium cannot (Engineered Composites, 2026).

The UK nuclear sector is simultaneously decommissioning legacy AGR stations, extending operating reactor lives, building Hinkley Point C, and preparing SMR construction at Wylfa — four distinct programmes with a shared secondary infrastructure challenge.

Why Nuclear Environments Create Unique Secondary Infrastructure Demands

The nuclear industry operates under a safety and quality framework that no other sector matches. Every material used on a licensed nuclear site must be appropriate for its application — in terms of structural performance, chemical resistance, radiation tolerance, and the specific requirement that it does not itself become a contamination source or complicate the radiation monitoring and survey work that is a routine part of nuclear site operations.

The secondary infrastructure challenge in nuclear — the walkways, platforms, grating, cable trays, and structural supports that allow workers to access, inspect, and maintain process equipment safely — is compounded by two factors that do not apply in conventional industrial settings. First, personnel access time in radiation zones must be minimised. Infrastructure that requires maintenance, inspection, and recoating brings workers back into radiation areas repeatedly, accumulating dose. Infrastructure that requires no maintenance over its operational life removes those repeat access events entirely. Second, decontamination is a routine operational requirement on nuclear sites. Materials that are difficult to decontaminate — porous, corroded, or surface-degraded — retain radioactive contamination and create ongoing hazard management challenges. Smooth, corrosion-immune FRP surfaces decontaminate more readily than corroded steel and do not harbour contamination in surface pitting or rust scale.

These two nuclear-specific requirements — minimise access, facilitate decontamination — align precisely with FRP's material properties. The result is that FRP is increasingly the specification of choice for secondary access infrastructure in nuclear environments, both in the UK and internationally.

FRP Properties That Matter in Nuclear Applications

1. Radiation Tolerance — Resin System Is the Critical Variable

FRP's radiation tolerance is primarily a function of its resin system. Epoxy and vinyl ester resin systems offer substantially better radiation resistance than standard isophthalic polyester resins, and for applications in areas of elevated dose rate, resin systems can be specified that have been characterised for radiation tolerance to the required total dose level (Engineered Composites, 2026). FRP cable trays for passive safety areas of nuclear power plants must pass radiation resistance testing to a cumulative dose of 10⁶ Gy in a boric acid environment — a performance requirement that correctly specified FRP products meet (NHC FRP, 2025).

In the dose rate environments encountered in most nuclear access and maintenance applications — which are typically well below the levels found in primary circuit areas — GRP structural profiles and grating products provide structural performance that is maintained throughout a service life that substantially exceeds the intervals between major decommissioning interventions (Engineered Composites, 2026). The key specification decision is matching the resin system to the specific radiation environment of the application — a decision that requires supplier technical guidance rather than generic product selection.

2. Non-Magnetic Properties — Enabling Radiation Survey and Monitoring Work

FRP is non-magnetic. This property — absent in steel — is directly relevant in nuclear decommissioning contexts where magnetic field mapping or radiation survey equipment is operated in proximity to access structures. Steel structures interfere with the operation of electromagnetic survey instruments. FRP does not — it is transparent to electromagnetic fields, allowing radiation characterisation and monitoring work to proceed without interference from the secondary infrastructure itself (Engineered Composites, 2026).

In a decommissioning context where accurate radiation mapping is a safety-critical activity that underpins the entire decommissioning safety case, access infrastructure that does not distort survey readings is a direct operational advantage. It simplifies the characterisation work, reduces the time required for radiation surveys, and improves the reliability of the data on which safety decisions are based.

3. Low Natural Radioactivity

GRP materials typically have low levels of natural radioactivity — an important property in environments where radiation monitoring and control are critical (Dura Composites, 2025). Steel and some other metals can contain trace levels of naturally occurring radioactive material (NORM) that complicate radiation monitoring in sensitive nuclear environments. FRP's inherently low background radioactivity simplifies the radiation management picture in these contexts and reduces the risk of false readings from the structural material itself.

4. Corrosion Immunity — Eliminating Maintenance Access in Radiation Zones

This is the property that matters most in operational nuclear terms. Steel secondary infrastructure in a nuclear environment — the humid, chemically active environments around cooling water systems, effluent treatment, and chemical dosing areas — corrodes. When it corrodes, it must be inspected, treated, and eventually replaced. Each of those interventions requires personnel to enter radiation zones, accumulating dose. Each is operationally planned, permitted, and documented under the nuclear site's radiation protection regime. Each is, in principle, avoidable with the right material specification.

FRP secondary infrastructure in the same environments requires no corrosion maintenance. No recoating, no structural replacement, no scheduled maintenance access to radiation zones for infrastructure upkeep. GRP walkways and access structures have a 60-year design life, ensuring long, low-maintenance service across the full operational period of new nuclear assets and well into the decommissioning phase (Dura Composites, 2025). For decommissioning programmes where the goal is to progressively reduce hazard and dose while maintaining safe access, the elimination of maintenance-driven access events is a directly beneficial outcome of the material selection decision.

5. Non-Conductive — Safety in Nuclear Electrical Environments

Nuclear power stations carry substantial electrical infrastructure — high-voltage distribution, instrumentation and control systems, emergency diesel generator systems, and the safety-critical electrical systems that underpin the plant's protection logic. Access platforms and cable management infrastructure in proximity to these systems must not become accidental current paths in the event of a fault. FRP's electrical non-conductivity eliminates that risk entirely, requires no earthing and bonding programme for cable trays and grating, and simplifies the electrical safety design of access infrastructure in electrically sensitive nuclear environments (JRAIN FRP, 2024).

FRP's non-magnetic properties allow radiation survey equipment to operate without interference from secondary infrastructure — directly enabling the characterisation work that underpins the nuclear decommissioning safety case.

The Four Programmes — Where FRP Applies

1. Decommissioning — The NDA's 17-Site Mission

The Nuclear Decommissioning Authority's 2026 to 2029 Business Plan covers 17 nuclear sites in the UK, with Hunterston B the first AGR to transfer for decommissioning in April 2026, followed by Hinkley Point B and the remaining AGR fleet in successive years (NDA, 2026). Decommissioning requires extensive access infrastructure — platforms, walkways, and grating that allow workers to safely access legacy structures for characterisation, dismantling, and waste management operations. In many cases, this access infrastructure needs to be installed in environments that have accumulated decades of radioactive contamination, that are structurally compromised, and where minimising the dose accumulated by each worker during each access event is a primary operational constraint.

FRP temporary and permanent access platforms installed for decommissioning work do not require maintenance-related re-entry once installed. They do not corrode in the humid, chemically active environments of legacy nuclear buildings. Their surfaces decontaminate readily. Their non-magnetic properties do not interfere with radiation survey instruments. And their light weight — 70 to 80% lighter than equivalent steel — reduces the manual handling burden and lifting equipment requirements in environments where working conditions are already constrained by protective equipment and dose limitations (Dura Composites, 2025).

2. Life Extension — Hinkley Point B, Heysham, Torness, Hartlepool

The UK's five operating nuclear sites are progressively extending their operational lives — Heysham II and Torness to March 2030, Hartlepool and Heysham I to March 2028, with further extensions under consideration (EDF Energy, 2026). Life extension programmes require maintenance, refurbishment, and in some cases replacement of secondary infrastructure that has reached the end of its original design life — including access grating, walkways, cable management, and support structures in operational areas of the plant.

Replacing corroded steel secondary infrastructure in an operating nuclear plant during a planned outage is an expensive, dose-intensive, and operationally constrained activity. Replacing it with FRP eliminates the repeat replacement cycle: FRP secondary infrastructure installed during a life extension refurbishment will outlast the extended operational period of the plant and carry into the decommissioning phase without requiring replacement again. The whole-life cost and dose-reduction case for FRP in nuclear life extension programmes is compelling precisely because the alternative — another replacement cycle in another planned outage — is so expensive in both cost and dose terms.

3. Hinkley Point C — New Large-Scale Build

Civil construction at Hinkley Point C in Somerset is well under way, with approximately 2,000 workers on site by early 2026, around £1 billion in contracts awarded, and the first engineering train arriving in February 2026 (World Nuclear Association, 2026). HPC will be the UK's first new nuclear power station in a generation — a 3.2 GW twin-EPR installation designed to operate for 60 years. Secondary infrastructure specified during construction must be appropriate for the full 60-year operational life of the plant.

New nuclear construction in the UK operates under a rigorous quality assurance framework that extends into the supply chain for structural materials and access systems. FRP products for nuclear applications must be manufactured under appropriate quality management systems and supplied with the documentation and traceability that nuclear QA requirements demand (Engineered Composites, 2026). Reinforce Technology supplies FRP products from ISO 9001, ISO 14001, and ISO 45001 certified manufacturing facilities and can support the documentation and traceability requirements of nuclear supply chain qualification.

4. Small Modular Reactors — Wylfa and Beyond

The Rolls-Royce SMR programme at Wylfa, with construction preparation now formally under way, represents a new category of nuclear infrastructure — smaller, modular, designed for series production rather than one-off construction. SMR design philosophy emphasises standardisation, simplified construction, and reduced on-site build complexity. FRP's modular, bolt-together construction — no welding, no hot work permits, lighter weight for easier manual handling — aligns directly with the simplified construction approach that SMR programmes are designed around. The Advanced Nuclear Framework published in February 2026 establishes pathways for multiple SMR developers and advanced reactor projects (GOV.UK, 2026), suggesting that the pipeline of new nuclear construction — and the associated secondary infrastructure procurement — will grow substantially through the decade.

FRP access infrastructure installed during nuclear life extension programmes eliminates the repeat replacement cycle — outlasting the extended operational period and carrying into the decommissioning phase without further intervention.

What FRP Supplies to Nuclear: The Product Range

The FRP products most relevant to nuclear secondary infrastructure applications cover four primary categories, each addressing a specific access and infrastructure need within the nuclear environment.

Access grating and walkway platforms. Moulded and pultruded FRP grating for maintenance walkways, inspection platforms, and access structures in operational and decommissioning nuclear environments. Anti-slip moulded surface provides safe footing in wet and contaminated conditions. Open mesh design facilitates decontamination and drainage. Non-magnetic, non-conductive, and available in resin systems characterised for radiation tolerance. GRP grating products supplied to nuclear projects including First Light Fusion in the UK, where non-conductivity and weight reduction versus steel were primary specification drivers (Dura Composites, 2025).

Cable trays and cable management. FRP cable trays for control cable, instrumentation cable, and auxiliary power cable routing in nuclear facilities. Non-conductive cable management that requires no earthing and bonding. Radiation-resistant resin systems available for elevated dose environments — cumulative dose resistance to 10⁶ Gy in boric acid environments for passive safety area applications (NHC FRP, 2025). Available in vinyl ester and epoxy resin systems for maximum chemical and radiation resistance.

Structural profiles and support systems. Pultruded FRP I-beams, C-channels, box sections, and angle profiles for secondary structural applications including cable tray support systems, equipment platforms, and access structure frames. Non-magnetic, non-conductive, corrosion-immune, and 70 to 80% lighter than equivalent steel — reducing manual handling burden in access-constrained nuclear environments.

Handrails and fall protection. FRP modular handrail systems for walkway edges, stairways, and mezzanine platforms. Non-conductive, corrosion-immune, and available in high-visibility colour options that support the visual safety management systems used in nuclear operational areas.

Supply Chain and Quality Assurance

Nuclear supply chain qualification is more rigorous than any other industrial sector. Materials used on licensed nuclear sites must be traceable to their source, manufactured under appropriate quality management systems, and supplied with documentation that supports the site's own nuclear safety case. This is not a bureaucratic overhead — it is the framework that ensures the integrity of every component on a nuclear site, and it applies to secondary structural materials and access systems as well as to primary process components.

Reinforce Technology supplies FRP products manufactured in ISO 9001, ISO 14001, and ISO 45001 certified facilities. We provide full material traceability, resin system specifications, radiation tolerance characterisation data where required, and the technical documentation necessary to support nuclear supply chain qualification. We work with nuclear contractors, decommissioning teams, and project engineers to identify the correct FRP specification for each application within the nuclear environment — matching resin system, reinforcement type, and product configuration to the specific chemical, radiation, and structural requirements of the project.

As with any structural or infrastructure material used in a nuclear environment, final confirmation of suitability for a specific application remains the responsibility of the appointed project engineer, nuclear safety case holder, and site licence holder. Reinforce Technology provides technical guidance and material recommendations based on the information supplied to us, but specification and safety case sign-off must always sit with the qualified professionals and organisations responsible for the nuclear safety case. We are happy to provide full technical data sheets, radiation tolerance characterisation data, resin system specifications, and application-specific support to assist with that process.

References

ANS Nuclear Newswire (2026) Rolls-Royce, GBE-N contract kickstarts UK's SMR plans for Wylfa site. Available at: https://www.ans.org/news/article-7937/rollsroyce-gben-contract-kickstarts-uks-smr-plans-for-wylfa-site/ [Accessed: April 2026].

EDF Energy (2026) Investment Boost to Maintain UK Nuclear Output. Available at: https://www.edfenergy.com/media-centre/investment-boost-maintain-uk-nuclear-output-current-levels-until-least-2026 [Accessed: April 2026].

Engineered Composites (2026) GRP for Nuclear Construction UK: Safety and Durability. Available at: https://engineered-composites.co.uk/nuclear-infrastructure-construction/ [Accessed: April 2026].

GOV.UK (2026) Building Our Nuclear Nation: Government Response to the Nuclear Regulatory Review 2025. Available at: https://www.gov.uk/government/publications/building-our-nuclear-nation-government-response-to-the-nuclear-regulatory-review-2025 [Accessed: April 2026].

GOV.UK (2026) Government to Unlock Advanced Nuclear to Grow Economy. Available at: https://www.gov.uk/government/news/government-to-unlock-advanced-nuclear-to-grow-economy [Accessed: April 2026].

NDA (2026) NDA Business Plan 2026 to 2029. Available at: https://www.gov.uk/government/publications/nuclear-decommissioning-authority-group-business-plan-2026-to-2029/nda-business-plan-2026-to-2029 [Accessed: April 2026].

NHC FRP (2025) What is FRP Cable Tray? Ultimate Guide to Lightweight Cable Management Solutions. Available at: https://www.nhcfrp.com/What-is-FRP-Cable-Tray-Ultimate-Guide-to-Lightweight-Cable-Management-Solutions.html [Accessed: April 2026].

World Nuclear Association (2026) Nuclear Power in the United Kingdom. Available at: https://world-nuclear.org/information-library/country-profiles/countries-t-z/united-kingdom [Accessed: April 2026].