The UK Ministry of Defence (MOD) has announced a £12.5 million investment to procure four additional Fresh Water Cooling Heat Exchanger (HEATEX) units for its nuclear-powered submarine fleet.
This move is part of the MOD’s broader commitment to improving the operational readiness and safety of its submarines.
Critical Upgrade for Submarine Safety
These state-of-the-art HEATEX units, designed and manufactured by Naval Group Limited, will play a vital role in cooling both the reactor compartments and auxiliary systems aboard the submarines. This ensures the vessels operate safely and efficiently during their missions.
The MOD highlighted the unique expertise of Naval Group as the Original Equipment Manufacturer (OEM), stating, “Naval Group is the only entity with the necessary technical drawings, specialist tooling, knowledge, and experience to supply these replacement units.
“These units will be manufactured to an improved specification, reinforcing the MOD’s commitment to maintaining the highest standards of safety and operational readiness.”
Ongoing Investment in Submarine Modernisation
This contract follows a similar award in March 2024 for two HEATEX units specifically for the ASTUTE-class submarines. These units are critical to the nuclear safety functions of the fleet, ensuring reliable cooling for key systems.
The direct award to Naval Group is in accordance with the Defence and Security Public Contracts Regulations 2011, which allows for exemptions in defence-specific procurements. The MOD has clarified that this contract does not require prior publication of a notice, as it aligns with regulations for securing national security.
Subcontracting and Broader Implications
While the MOD did not disclose details about subcontracting opportunities, the deal underlines its ongoing efforts to enhance the capabilities of the Royal Navy’s nuclear-powered submarines. This investment ensures the fleet remains technologically advanced and aligned with modern safety and operational standards.
