Collaboration Between Suffolk Firms Delivers Key Testing Facility for Sizewell B Nuclear Power Station

Minima was responsible for designing robust 19-inch enclosures, while ETL led the assembly and testing of the electrical systems. The racks incorporate a variable AC power supply, allowing EDF to test power units that output 5V, 12V, and 15V DC. To replicate real-world conditions, large power resistors were integrated to apply realistic loads, with a cooling system ensuring stable operation during testing.

A major advantage of this collaboration was the close working relationship between EDF and ETL, made easier by their proximity. The EDF project team visited ETL’s facilities regularly, ensuring usability, approval, and testing were carried out efficiently. This hands-on approach allowed EDF to provide direct feedback throughout development, resulting in a highly practical and user-friendly test facility that meets their exact operational needs.

EDF Power Test Rack
“This project highlights the strength of local engineering expertise,” said Jonathan Paul, Director at ETL. “By working closely with EDF and Minima Design, we’ve developed a user-friendly and highly effective test facility that enhances the reliability of Sizewell B’s critical power supplies.”

From initial specifications to final commissioning, the entire process demonstrated the ability of Suffolk businesses to deliver complex engineering solutions for the nuclear sector. Full documentation and user guides were provided to EDF, ensuring seamless operation and long-term usability.

Jason Reeve at EDF commented: “Working closely with ETL has been invaluable in developing a test facility that meets our specific requirements. Their ability to tailor solutions and adapt to our feedback has ensured that the final product is both practical and highly effective for our operational needs. This project is a great example of how local businesses can contribute to national infrastructure with innovative engineering.”

EDF Test Rack for Sizewell B Nuclear Power Station
“At ETL, we actively seek opportunities to work with other local businesses, as we believe in strengthening the regional engineering and manufacturing sector,” said Barrie Hayter, Sales Director at ETL. “This project is a great example of that, with Minima Design handling the design and another Suffolk-based company providing the metalwork fabrication. By collaborating with skilled partners in our area, we can deliver high-quality, specialised solutions that benefit both our clients and the local economy.”

“We are proud to have collaborated with ETL to deliver a solution that supports national infrastructure,” added Andrew McCulloch from Minima Design. “This project is a great example of how local businesses can work together.”

James Williamson from NAAME (New Anglia Advanced Manufacturing and Engineering) highlighted the importance of fostering local collaboration: “East Anglia has an incredible wealth of engineering expertise, and projects like this demonstrate the value of utilising local talent. By uniting, businesses in the region can drive innovation, create highly technical solutions, and strengthen the local supply chain. We need to harness this potential further and encourage greater collaboration between firms to ensure the region remains a leader in advanced manufacturing.”

The partnership between ETL and Minima Design underlines the vital role of local expertise in supporting national energy security. As EDF continues to invest in the safety and efficiency of Sizewell B, the success of this project proves the value of engaging regional engineering talent for mission-critical applications.

Framlingham Technology Centre is delighted to play a part in Minima’s success and looks forward to supporting their future growth.