Nano Nuclear Energy Advances KRONOS MMR Helium Circulator Design to Detailed Phase with Baker Hughes Subsidiary
Portable microreactor developer Nano Nuclear Energy Inc. (NASDAQ: NNE) continues to hit critical engineering and financial milestones as it prepares its proprietary KRONOS Micro Modular Reactor (MMR) for prototype construction and regulatory licensing. In early September 2026, the company announced a major technical milestone in its reactor engineering program, advancing its collaboration with a key industrial partner.
The KRONOS MMR Helium Circulator Milestone
On September 3, 2026, Nano Nuclear announced that its engineering collaboration with Howden, a Baker Hughes Business, has progressed to the detailed design phase for the primary helium circulator of the KRONOS MMR™ Energy System.
The primary helium circulator is a critical mechanical subsystem responsible for:
- Circulating helium coolant through the reactor core to transfer heat.
- Operating at a high primary coolant pressure of approximately 6 MPa.
- Directly influencing the overall plant efficiency, thermal performance, and long-term operational reliability.
Howden, which became part of Baker Hughes following its acquisition of Chart Industries, is leading the engineering design of this component, applying its specialized expertise in helium turbomachinery and high-temperature gas-cooled reactor (HTGR) technology. During the preliminary engineering phase, Howden completed key engineering evaluations, developed detailed 3D design models, and conducted formal design reviews with Nano Nuclear's team.
The project is now moving into:
- Component qualification
- Materials and performance testing
- Design optimization and manufacturing planning
James Walker, CEO of Nano Nuclear Energy, commented on the significance of the milestone:
"Progressing the primary helium circulator into detailed design represents another important milestone in the continued development of the KRONOS MMR™ Energy System. Advancement of the circulator design strengthens the technical foundation of the overall reactor program and demonstrates the disciplined engineering execution essential for successful commercialization."
This milestone follows a separate engineering collaboration with Fortil, announced in late August 2026, which focused on designing the KRONOS fuel handling and storage systems.
Financial Position and Regulatory Pipeline
Nano Nuclear remains in a pre-revenue, highly capitalized state. As of June 30, 2026, the company reported:
- Cash Position: $298.5 million in cash and cash equivalents, against just $2.8 million in total debt, giving it a multi-year runway to fund its R&D and licensing programs.
- Quarterly Net Loss: $10.1 million for the quarter ending June 30, 2026.
- TTM Revenue: $214,042, reflecting early-stage consulting and services.
- Stock Performance: NNE shares closed at $17.72, representing a market capitalization of $951.5 million. While the stock has declined 19.9% over the past three months, it retains substantial Wall Street interest, with analysts citing a mean price target of $40.57.
On the regulatory front, Nano Nuclear continues its pre-application engagement with the U.S. Nuclear Regulatory Commission (NRC) for a Construction Permit Application (CPA) to build a prototype KRONOS microreactor at the University of Illinois Urbana-Champaign, with a target to begin construction in the second half of 2027.