NANO Nuclear Secures DOE GAIN Voucher for KRONOS MMR™ Safety Framework Development

Event summary

  • NANO Nuclear received a DOE GAIN Voucher (NE-26-38854) on April 9, 2026, to develop a validated uncertainty quantification (UQ) framework for its KRONOS MMR™ Energy System.
  • The collaboration with Oak Ridge National Laboratory (ORNL) will use the SCALE/TSUNAMI code suite to analyze reactor physics metrics like reactivity and power distribution.
  • This is NANO Nuclear’s second GAIN voucher and first for the KRONOS MMR™, supporting pre-licensing engagement with DOE and NRC.
  • The framework aims to strengthen design margins, reduce regulatory uncertainty, and accelerate commercialization of the microreactor technology.

The big picture

The GAIN Voucher underscores DOE’s push to accelerate nuclear innovation, particularly for first-of-a-kind reactors like KRONOS MMR™. NANO Nuclear’s partnership with ORNL highlights the growing reliance on national labs to bridge gaps between R&D and commercialization. The focus on uncertainty quantification reflects broader industry efforts to standardize safety metrics for next-generation reactors.

What we're watching

Regulatory Alignment
Whether ORNL’s NRC-recognized tools can streamline KRONOS MMR™ licensing and reduce approval timelines.
Technical Validation
The pace at which the UQ framework generates actionable data to inform reactor design and deployment.
Commercialization Path
How this collaboration positions NANO Nuclear against competitors in the advanced microreactor space.