Nuclear energy remains a key pillar in the global energy transition, providing reliable, low-carbon power alongside renewable sources. Emerging technologies such as small modular reactors, advanced nuclear designs, and fusion energy are reshaping the future of the sector.
ITER project
Trillium Flow Technologies is playing an important role in this transformation by supplying complex pumping systems to the ITER (International Thermonuclear Experimental Reactor) in southern France.
Awarded in 2025, the contract covers the delivery of eight specialised pumping systems. ITER is a global collaboration involving 35 countries, aiming to prove that nuclear fusion can be a viable, large-scale, carbon-free energy source.
At the centre of the project is the Tokamak, a magnetic confinement system designed to contain plasma at temperatures exceeding 15 million degrees Celsius. This process replicates how the sun generates energy and could pave the way for virtually unlimited clean power.
Pump package
Trillium’s Italian manufacturing facility is responsible for designing and supplying the eight pumping systems for the reactor’s primary circuit. These systems form part of the IBED Primary Heat Transfer System (PHTS), which circulates demineralised water to cool the plasma inside the reactor’s vacuum vessel.
Engineering challenges
The project presents a range of complex engineering challenges. The pumping systems must fit within tightly defined spaces, requiring precise alignment of components such as suction and discharge flanges, baseplate anchor points, and cable entry routes.
In addition, the pumps will operate within a protective shield, exposing them to extreme conditions, including neutron radiation and strong magnetic fields. Even equipment located outside the shield, such as control panels, must withstand residual radiation that can impact electrical and instrumentation systems.
Highly engineered solution
Trillium addressed these challenges from the earliest stages of the project by developing a fully integrated and highly engineered solution. Advanced simulations and design calculations were carried out to optimise performance while meeting strict spatial and environmental requirements.
Careful selection of auxiliary equipment was critical, particularly for electronic components most affected by the operating conditions. Special attention was also given to Safety Important Components (SICs) to ensure maximum reliability and safety.
Supply scope
The contract includes eight complete pumping trains, each consisting of a horizontal multistage between-bearing pump (API 610 BB2 type), an electric motor, and a double mechanical sealing system with a barrier system and leakage collector, all mounted on a main skid.
The package also includes eight electrical and control cabinets installed in dedicated HVAC-controlled areas. Each cabinet is equipped with a variable frequency drive and a vacuum circuit breaker.
In addition, common control systems are supplied, including a unit control panel, a low-voltage motor control centre, and an automatic refilling system to supply barrier fluid to all sealing systems.
All equipment complies with international standards such as API and IEC, as well as French RCC regulations and ASME nuclear design guidelines.
Expertise and partnership
Trillium has been involved in the ITER project since 2019, previously supplying the primary pumping system for the vacuum vessel primary heat transfer system through its Termomeccanica Pompe legacy brand.
This latest contract builds on that successful collaboration and highlights the company’s strong expertise in both conventional and nuclear power applications. With its proven capabilities, Trillium is well positioned to meet the demanding requirements of this complex and groundbreaking project.
