Spotlight
Kaleidos
Project Overview
The U.S. Nuclear Regulatory Commission (NRC) is currently engaged in pre-application activities with Radiant Industries, Inc. (Radiant), starting in October 2022. Radiant is an El Segundo, CA company developing its Kaleidos design, a transportable micro-reactor designed to generate 3MWth and approximately 1MWe. The Kaleidos micro-reactor is a high-temperature gas-cooled reactor (HTGR) using TRISO fuel, helium gas coolant, and prismatic graphite blocks. Each micro-reactor will be fully contained in a single shipping container.
For more information, please see the Radiant pre-application documents (NRC Docket 99902106).
To subscribe to the Radiant Kaleidos email service, select Radiant Kaleidos from the Advanced Reactors list after entering your email into the GovDelivery system.
Pre-Application Activities
Product | Type | Reference | Status |
Radiant Kaleidos Micro-reactor Pre-application Regulatory Engagement Plan – October 2023 | Regulatory Engagement Plan | No review requested | |
10 CFR 70 Gap Analysis | White Paper | ||
10 CFR Part 50 and 52 Gap Analysis | White Paper | ||
10 CFR Part 100 Gap Analysis | White Paper | ||
10 CFR Part 51 Gap Analysis | White Paper | ||
10 CFR Part 55 Gap Analysis | White Paper | Under Review | |
Kaleidos Fleet Operator Training White Paper | White Paper | Non-public proprietary | Under Review |
Kaleidos Factory Fueling Operations | White Paper | No Review Requested |
Contacts
Contacts for the Kaleidos Pre-Application Review | |
|---|---|
Lead Project Manager | |
Contact a Public Affairs Officer | |
Page Last Reviewed/Updated Thursday, December 11, 2025
Page Last Reviewed/Updated Thursday, December 11, 2025