Energy & Utilities
Kairos Power
Kairos Power is a nuclear technology company developing fluoride salt-cooled, TRISO-fueled advanced reactors, which signed a multi-plant agreement with Google to deliver up to 500 megawatts of carbon-free electricity by 2035. Kairos broke ground in April 2026 on its Hermes 2 commercial demonstration reactor in Oak Ridge, Tennessee, backed by Google, targeting online operation by 2030. The company also raised a $619 million Series C in mid-2026 led by Altimeter Capital, one of the largest-ever advanced-nuclear funding rounds, to accelerate its Hermes fleet buildout and supply chain, while its Hermes 1 non-power test reactor continues to gather operating data ahead of NRC licensing milestones for the commercial units.
Sources
Every claim traced to a primary source — evidence, recent activity, and insider filing behavior, all in one place.
Evidence
3 sources · 69% avg. source confidence
- Axios — Kairos Power breaks ground on Google-backed Hermes 2 reactor in Tennessee72% source confidence
- Kairos Power / Utility Dive — Google and Kairos Power partner to deploy 500 MW of clean electricity generation68% source confidence
- World Nuclear News / ANS Nuclear Newswire — TVA signs first-of-its-kind Gen-IV PPA with Kairos as NRC clears Hermes 2 safety evaluation66% source confidence
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The Story So Far (last 6 months)
Auto-generated from this entity's dated milestones, relationship updates, and sourced evidence — not AI-written, just sorted.
Kairos Power's Timeline
A sourced, dated history of Kairos Power's key moments — founding to present.
Jan 2016 · Founded
Kairos Power was founded to develop fluoride salt-cooled, high-temperature advanced nuclear reactor technology.
Apr 2026 · Breaks ground on Hermes 2 with Google
Kairos Power broke ground on its Hermes 2 commercial demonstration reactor in Oak Ridge, Tennessee, backed by Google, targeting online operation by 2030 as part of a multi-plant agreement to deliver up to 500 MW of carbon-free electricity by 2035.
Jul 2026 · TVA signs PPA; NRC completes Hermes 2 safety evaluation
The Tennessee Valley Authority signed a power purchase agreement to buy power from Hermes 2, becoming the first US utility to contract for electricity from a Gen-IV reactor; days later, on July 22, 2026, the NRC completed its final safety evaluation for the two 35-MWth Hermes 2 test reactors, clearing the way for final pre-startup review.