ORNL and Kairos Power Partner to Advance Deployment of Next-Gen Nuclear Energy

Why It Matters

The partnership accelerates deployment of next‑generation nuclear power, addressing rising U.S. electricity demand and decarbonization goals. Successful demonstration could unlock a new class of safe, high‑temperature reactors for grid and industrial applications.

Key Takeaways

• $27M ORNL‑Kairos partnership accelerates fluoride‑salt reactor development.
• DOE provides up to $303M for Hermes demonstration reactors.
• ORNL will test TRISO fuel, materials, and remote‑maintenance systems.
• Hermes reactors under construction in Oak Ridge, Tennessee.
• Collaboration taps East Tennessee nuclear innovation ecosystem.

Pulse Analysis

Molten‑salt reactors have moved from experimental concepts to viable commercial candidates, and the U.S. Department of Energy is betting heavily on the technology. By allocating up to $303 million through the Advanced Reactor Demonstration Program, the DOE aims to de‑risk the Hermes line of fluoride‑salt‑cooled, high‑temperature reactors that Kairos Power is building in Oak Ridge. The recent $27 million partnership with Oak Ridge National Laboratory adds a critical layer of scientific rigor, granting Kairos access to decades‑old expertise in salt‑based coolant systems and a suite of world‑class test facilities.

At the heart of the Hermes design is TRISO‑coated particle fuel, which offers inherent safety by containing fission products even under extreme temperatures. ORNL will evaluate fuel synthesis, pebble integrity, and irradiation behavior in its Coated Particle Fuel Development Laboratory and Irradiated Fuels Examination Laboratory. Simultaneously, the lab’s Manufacturing Demonstration Facility will produce high‑temperature‑compatible components—ceramics, carbon composites, and advanced alloys—and validate additive‑manufacturing processes for salt‑exposed environments. Remote‑maintenance prototypes tested under combined radiation and corrosive‑salt conditions will further prove the reactor’s operability.

The collaboration reinforces East Tennessee’s emergence as a nuclear innovation hub, linking federal labs, the University of Tennessee, TVA, and private investors. Successful demonstration of Hermes could accelerate the rollout of high‑temperature reactors for grid stability, industrial heat, and data‑center power, directly supporting U.S. decarbonization targets and the projected surge in manufacturing electricity demand. Moreover, the partnership showcases a model for public‑private synergy that could be replicated across other advanced energy technologies, driving job creation and reinforcing national energy security. The initiative also positions the United States to compete globally in next‑generation nuclear exports.