Radiant
Developing Kaleidos, a portable 1MW nuclear micro-reactor designed to replace diesel generators with clean, mass-produced, and meltdown-proof power for remote and critical infrastructure.
- CEO / Founder
- Doug Bernauer
- Team Size
- 50-200
- Stage
- Growth Stage
- Total Funding
- $381.2M
- Latest Round
- Series C ($165M)
- Key Investors
- ["Andreessen Horowitz (a16z)","Founders Fund","Union Square Ventures","DCVC","Chevron Technology Ventures","Giant Ventures","StepStone","ARK Venture Fund"]
Technology & Products
Key Products
Kaleidos: a 1.2 MWe nuclear microreactor designed to operate for 5 or more years before refueling, fitting within a single shipping container for portability.
Technological Advantage
Applies SpaceX-inspired rapid prototyping and advanced manufacturing principles to nuclear energy, shifting the industry from bespoke civil engineering projects to standardized, mass-produced hardware products.
Differentiation
Value Proposition
Provides a zero-emission, 'plug-and-play' energy source that is meltdown-proof, requires no water for cooling, and eliminates the high cost and logistical risk of diesel fuel transport.
How They Differentiate
Radiant differentiates through its 'SpaceX-style' approach to nuclear: mass-manufactured, helium-cooled (eliminating water requirements), and designed to fit entirely within a single shipping container for rapid deployment. Unlike larger SMRs, its 1MW Kaleidos reactor is specifically sized to replace individual diesel generators.
Market & Competition
Target Customers
Data center operators, military installations (U.S. Air Force), remote communities, mining operations, and disaster relief agencies.
Industry Verticals
["Data Centers","Defense","Mining","Energy & Utilities","Disaster Response"]
Competitors
Oklo, Westinghouse (eVinci), Ultra Safe Nuclear Corporation (USNC)
Growth & Milestones
Growth Metrics
Grew team to over 50 employees; secured multiple government contracts for testing and development.
Major Milestones
["First company to receive U.S. Department of Energy (DOE) approval for a Safety Design Strategy (SDS) for a commercial micro-reactor.","Selected for the DOE's Front-End Engineering and Design (FEED) program for testing at the DOME facility.","Successfully completed passive cooling tests for the Kaleidos reactor core.","Secured a contract with the DIU to demonstrate micro-reactor power for military installations."]
Notable Customers
U.S. Air Force, Defense Innovation Unit (DIU), Idaho National Laboratory (Testing Partner)