SBIR/STTR Research Award

Kronos Micro-Modular Reactor (MMR): Secure Power for Air Force Installation Energy Resilience

Award identifier 2cb76bf1cfd26d1dae7cef3dd86c27dcf072275d9234c3820b7a0f5413e43f84Awarding agency Department of Defense · Air Force

Award amount

$1,248,598

Program and phase

SBIR · Phase II – Direct to Phase II

Award year

2025

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Award details

Awarding agency
Department of Defense
Branch
Air Force
Recipient company
Nano Nuclear Energy Inc
Proposal award date
2025-08-28
Contract end date
2027-06-01
UEI
D1JBHRGVEMX1
Solicitation number
X25.5
Topic code
AFX255-DPCSO3

Research abstract

The Kronos Micro-Modular Reactor (MMR) is a transportable, high-temperature gas-cooled system that yields 15 MWe (45 MWth) steady power for as long as thirty years with no refuel cycle. Graphite-moderated prismatic blocks and TRISO/FCM fuel keep fission products sealed at extreme temperature, and a strong negative temperature coefficient halts reactivity rise. Passive helium coolant draws decay heat without pumps or water, so the core stays intact without external power or operator action after total grid loss. Kronos links to existing microgrids and shifts to island mode in milliseconds, which meets the Air Force Special Operations Command thirty-day resilience rule, defeats cyber and physical threats, and ends fuel convoys. A molten-salt thermal battery stores ten hours of full output to match peak demand, while optional hydrogen burners extend dispatchable heat without core load change. Technology readiness now stands at TRL 5-6 with component fabrication under way, national-lab validation complete, and early NRC dialogue active. Nano Nuclear holds over $200 million in capital, letters of intent from utilities, data centers, and mineral-extraction majors, and formal collaboration with SAF/IE, AFCEC, and Joint Base Anacostia-Bolling to field the first unit. Kronos therefore delivers compact, carbon-free, inherently safe power that hardens critical installations, stabilizes hybrid energy architectures, and unlocks a projected $10 billion global microreactor market by 2035.

Technology keywords

Not reported

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Agency intelligence

Department of Defense

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