Applus+ Completes Landmark Co-60 Radiography on HPC HR1 Circuit

HPC is the UK’s first third generation nuclear power station and the first new nuclear build since Sizewell B in 1995. The HR1 primary circuit welds presented a unique technical challenge due to their size thickness and complexity requiring the reintroduction of Cobalt 60 radiography used for the first time on a UK nuclear primary circuit in over 30 years.

Working closely with the Tier 1 contractor and the client at HPC, the Applus+ team delivered the HR1 programme on time with zero radiation safety incidents. There were no injuries or reportable events, and radiation doses remained consistently low throughout the campaign, clearly demonstrating strong planning, effective teamwork, and an uncompromising safety culture.

Operational performance continued to improve as the programme progressed, supported by enhanced source recovery arrangements, efficient barrier management, and well-rehearsed contingency methods tailored specifically to nuclear island conditions. These high standards were further recognised through three Office for Nuclear Regulation interventions, all of which received a GREEN rating.

With HR1 successfully completed, the focus now turns to HR2, which is scheduled to commence in 2026. The lessons learned from HR1 place Applus+ in a strong position to continue supporting the project by retaining suitably qualified and experienced personnel (SQEP) and further refining processes to ensure safe, efficient, and high-quality delivery.

This achievement reflects the professionalism, dedication, and technical expertise of the Applus+ team at HPC and provides a strong foundation as the project progresses confidently into its next phase.