Prabowo Widodo
The global race to secure reliable, carbon-free energy for artificial intelligence infrastructure has reached a major milestone as nuclear innovation startup Kairos Power formally enlists South Korean engineering and construction giant Samsung C&T. Announced on Monday, the strategic partnership is valued at up to $100 million and is specifically designed to accelerate the deployment of a 50-megawatt demonstration reactor intended to supply electricity to Google data centers by 2030.
This multi-faceted agreement represents a convergence of heavy industrial construction expertise and cutting-edge nuclear engineering. As the technology sector faces an unprecedented surge in electricity demand driven by generative AI and hyperscale cloud computing, tech giants are increasingly turning to advanced nuclear power to meet their sustainability targets while guaranteeing continuous, baseload power.
Financial Structure and Engineering Collaboration
Under the terms of the agreement, Samsung C&T will provide a combination of financial equity and specialized technical capabilities. The total package is worth up to $100 million, divided into a $70 million equity investment in Kairos Power and $30 million in "in-kind" engineering services. This infusion of capital and operational expertise is expected to significantly bolster Kairos Power’s supply chain and construction capabilities as it transitions from a research-and-development entity into a commercial-scale energy provider.
Samsung C&T brings substantial credentials to the table. The firm has previously built or contributed to the construction of approximately a dozen nuclear reactors worldwide. By integrating Samsung’s extensive project management and engineering infrastructure, Kairos aims to mitigate the execution risks traditionally associated with first-of-a-kind nuclear construction projects.
The AI Energy Boom and the Google Partnership
The collaboration between Kairos Power and Samsung C&T is deeply rooted in broader macroeconomic shifts across the technology and energy sectors. In the fall of 2024, Google made headlines by signing a landmark agreement with Kairos Power to purchase electricity generated by a fleet of advanced nuclear micro-reactors. Under that agreement, Google aims to bring roughly 500 megawatts (half a gigawatt) of nuclear capacity online by 2035.
The surge in power consumption from data centers has forced technology companies to look beyond traditional wind and solar portfolios, which, while clean, remain intermittent. Nuclear energy offers high-capacity-factor generation capable of running continuously regardless of weather conditions, making it an ideal power source for data centers that require 24/7 uptime.
Kairos Power’s dual-reactor strategy in Oak Ridge, Tennessee, serves as the foundation for fulfilling the Google contract. The company is currently constructing two distinct reactors at the site. The first, designated Hermes 1, is a low-power demonstration reactor intended to validate the company’s proprietary systems, supply chains, and regulatory compliance frameworks. The second, Hermes 2, will serve as the company’s first commercial-scale operational reactor.
Output from Hermes 2 will account for the initial 50 megawatts of capacity under the broader Google power purchase agreement. Following regulatory review, the U.S. Nuclear Regulatory Commission (NRC) granted Kairos Power construction permits for the Hermes facilities in November 2024, marking a rare and vital regulatory milestone for an advanced reactor design in the United States.
Innovative Reactor Design: Fluoride Salts and TRISO Fuel
Kairos Power’s technological approach diverges significantly from traditional light-water reactors that have dominated the commercial nuclear industry for decades. The Hermes 2 facility and subsequent commercial units will utilize a fluoride salt-cooled high-temperature reactor (FHR) design.
While fluoride salt-cooled reactors have been studied by researchers for decades, none have been built and operated at commercial scale. The primary advantage of utilizing high-temperature fluoride salts as a coolant lies in their exceptionally high boiling point. Because the liquid salt remains stable at high temperatures without requiring extreme pressures, the operating pressure inside the reactor vessel remains remarkably low. This design characteristic virtually eliminates the risk of high-pressure steam explosions or energetic containment breaches in the event of mechanical or component failures.
Furthermore, Kairos Power relies on TRISO (TRI-structural ISOtropic) fuel, a robust advanced nuclear fuel technology. TRISO fuel consists of uranium fuel kernels encapsulated in multiple concentric layers of ceramic and carbon materials. These microscopic particles are then formed into billiard ball-sized spherical elements or compacted into fuel assemblies. The physical and chemical properties of TRISO fuel are engineered to retain radioactive fission products even under extreme accident scenarios, such as total loss of coolant or core overheating, thereby preventing potential meltdowns.
Timeline, Regulatory Environment, and Execution Challenges
Despite the innovative safety profiles of FHR technology and TRISO fuel, Kairos Power faces an exceptionally demanding schedule. The startup has been given a timeline of roughly five years to complete construction, commission, and operationalize its first commercial power plant by 2030.
Within the context of the global nuclear industry, a five-year development and construction timeline for a novel reactor design is notably accelerated. Historically, major nuclear infrastructure projects have been plagued by multi-year delays, regulatory bottlenecks, and massive cost overruns. To successfully meet the 2030 target for Hermes 2—and subsequently scale to meet the larger 500-megawatt commitment to Google by 2035—Kairos must execute its construction schedules with unprecedented efficiency.
The involvement of Samsung C&T is viewed by industry analysts as a tactical measure to address these execution risks. By partnering with a firm that possesses a proven track record in global nuclear engineering, Kairos aims to streamline supply chain logistics, labor management, and quality control during the construction phase in Tennessee.
Broader Industry Implications and Future Outlook
The partnership between Kairos Power and Samsung C&T underscores a broader transformation in how advanced nuclear technologies are financed and built. Historically, nuclear reactor development was heavily dependent on government funding, legacy utility conglomerates, and lengthy bureaucratic timelines. Today, venture-backed startups are increasingly partnering with private equity, global construction conglomerates, and deep-pocketed technology firms to bypass traditional market barriers.
If Kairos Power and Samsung C&T successfully deliver Hermes 2 by 2030, it could establish a repeatable blueprint for deploying small modular and advanced micro-reactors across industrial landscapes worldwide. As data center operators continue to search for viable pathways to power artificial intelligence infrastructure without exacerbating carbon emissions, the success or failure of this Tennessee-based project will serve as a critical bellwether for the future of advanced nuclear energy in the twenty-first century.
