Peri’s Role in the Formation of the Reactor Domes at Hinkey Point C

Why It Matters

The innovative, tie‑free formwork solution demonstrates how advanced engineering can overcome severe geometric and load constraints, reducing schedule risk for large‑scale nuclear projects. It showcases Peri’s capability to deliver fast, safe construction on critical infrastructure, influencing future high‑rise and nuclear builds.

Key Takeaways

• Peri fabricated 199 custom formwork panels for Hinkley dome
• Unique tie‑free system used 550 Strongbacks and 45° anchor adapters
• Digital 3D modeling validated loads beyond standard formwork parameters
• Installation for Unit 2 completed in under two weeks
• Prefabricated platforms cut high‑rise work time and improved safety

Pulse Analysis

The reactor domes at Hinkley Point C represent one of the most demanding formwork challenges in recent UK construction history. Their double‑layered geometry, spanning 45 metres in height, required a flexible system that could adapt to multi‑directional curves while bearing massive concrete pressures. Peri’s Vario platform was chosen for its adaptability, and the company produced 199 custom‑engineered panels to match the dome’s unique shape. By eliminating traditional tie‑backs, the solution avoided interference with dense reinforcement and post‑tensioning ducts, a critical factor for nuclear safety compliance.

To achieve a tie‑free configuration, Peri engineers combined 550 Strongbacks with specially designed 45‑degree anchor adapters, creating horizontal SB platforms that acted as load‑bearing rings around the dome perimeter. This unconventional setup transferred concrete forces through steel RCS rails rather than the timber deck, preserving structural integrity during the massive pours. The design process moved from 2D sketches to comprehensive 3D CAD and structural models, allowing precise verification of load paths, anchor forces, and platform stability. The digital workflow not only ensured safety but also accelerated decision‑making, enabling rapid on‑site adjustments when anchor positions shifted.

The successful execution has broader implications for the construction sector. Prefabricated platform components reduced high‑rise work time, enhancing worker safety and minimizing weather‑related delays. The rapid installation of Unit 2’s formwork—completed in under two weeks—demonstrates how lessons learned can be scaled across similar projects, from nuclear reactors to large‑scale civil infrastructure. Peri’s ability to innovate beyond standard system parameters positions it as a go‑to partner for complex, high‑value builds, signaling a shift toward more digital‑driven, adaptable construction methodologies in the industry.