# Radiant: infrastructure company

Canonical ID: `ed3bad9e-154a-42ee-b097-d3eb6bb83209`

## Key facts

- **DOE safety analysis approval (company-stated, Oct 2026):** Said Oct 29 2026 that [DOE](/companies/us-department-of-energy.md) approved its Documented Safety Analysis for Kaleidos, covering operation at power as well as first criticality. DOE's Readiness Review comes next.
- **Kaleidos test plan (company-stated):** Five-phase campaign at INL's DOME test bed: 60 effective full-power days over several months, ending with at least 150 hours at full power without operator intervention.
- **Kaleidos reactor (reported):** Helium-cooled, TRISO-fueled high-temperature gas microreactor rated about 1 MWe (3 MWth), sized to fit in a single shipping container. The test unit left [El Segundo](/locations/el-segundo-ca.md), [California](/locations/california.md), in Aug 2026.
- **Navy site selection (reported):** Selected by the [U.S. Navy](/locations/united-states-us-navy.md) to deploy Kaleidos at Naval Weapons Station Crane in [Indiana](/locations/indiana.md).

- **Slug:** radiant-nuclear
- **Status:** private
- **HQ:** El Segundo, California, USA

## Models

_No models registered._

## Supplies to

_No verified supply relationships on file. Supply-chain coverage is being added across the registry; check back as the seed populates this company's outbound edges._

_Outbound supply edges. Each appears when verified with at least two strong sources. Sources are append-only; corrections add new sources rather than rewrite history._

## Common questions

### What is Radiant?

Developer of Kaleidos, a microreactor of about 1 MWe sized to fit in a single shipping container, selected for [US military](/locations/united-states-military.md) sites.

### What does Radiant make?

Radiant has no robot models recorded on the DEPLOY registry.

### Is Radiant publicly traded?

No. Radiant is privately held and not publicly traded, per the DEPLOY registry.

### How can I invest in Radiant?

Radiant is a private company; its shares are not available on public markets, so retail investors cannot buy the stock today.

### Where is Radiant headquartered?

Radiant is headquartered in [El Segundo, California, USA](/locations/el-segundo-california-us.md).

### Who owns Radiant?

Radiant is privately held; ownership sits with its founders and private investors.


## Sources (4)

1. https://www.radiantnuclear.com/news/radiant-secure-doe-approval-for-full-power-operations · 2026-10-29
2. https://www.businesswire.com/news/home/20261029539545/en/Radiant-Achieves-Industry-Milestone-as-the-Only-Microreactor-Design-to-Secure-DOE-Safety-Analysis-Approval-for-Full-Power-Operations · 2026-10-29
3. https://www.nuclearnewsnetwork.com/news/radiant-kaleidos-doe-dsa-full-power-approval · 2026-10-31
4. https://www.energy.gov/ne/articles/worlds-first-microreactor-test-bed-now-open-business · 2026-04-01

## The verified answers

- [Which companies have the most robots deployed](/which-companies-have-the-most-robots-deployed.md)
- [Which operators run the most robots](/which-operators-run-the-most-robots.md)
- [Which robot operators cover the most countries](/which-robot-operators-cover-the-most-countries.md)

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