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Kairos Hermes 2 Demonstration Plant

Oak Ridge, Tennessee, United StatesUnder construction
Capacity
—
No public figure
Lead participant
Kairos Power LLC
Developer
Last updated
Aug 25, 2026
Most recent public record update

About Kairos Hermes 2 Demonstration Plant

First Google-linked power-producing Kairos deployment, now described as one 50-MWe reactor targeting 2030 operation. Kairos Hermes 2 Demonstration Plant is in Oak Ridge, TN, US and is a generation site with under construction status. Participants include Kairos Power LLC as developer, Tennessee Valley Authority as utility, Google LLC as customer. Development comprises Original two-unit 28-MWe configuration (superseded), Revised single-reactor 50-MWe plant (under construction). Key milestones include Hermes 2 groundbreaking ceremony. (2026-04-17) and Target year for electricity delivery. (2030-12-31). advanced nuclear generation — 50 MWe: Single current reactor design; generation output. tva power purchase agreement — 50 MW: TVA buys plant output; Google receives clean-energy attributes. Permitting includes nuclear construction permits for Hermes 2 CPTR-7 / CPTR-8 (issued original configuration).

Program relationships

1 linked
Google–Kairos Advanced Nuclear Orderbook

Program record

Related projects

Projects sharing a market, utility, or organization.

2 related

Capacity

Operating capacity—An operating IT-capacity figure has not been publicly disclosed.

No additional capacity claims are published.

Development

2 phases · 4 milestones
Original two-unit 28-MWe configurationChanged Or Cancelled

NRC construction permits covered two 14-MWe units; public licensing reconciliation with the current design remains open.

2 buildings

Revised single-reactor 50-MWe plantUnder Construction

Current company design targeting 2030 operation.

1 building

Nov 21, 2024
NRC issues two original Hermes 2 construction permits
Completed
Aug 18, 2025
TVA PPA and single-reactor 50-MWe redesign announced
Completed
Apr 17, 2026
Hermes 2 groundbreaking ceremony
Completed
Dec 31, 2030
Target year for electricity delivery
Forecast

Infrastructure

Electric GridUnder Construction

50 MWe

Single current reactor design; generation output.

Utility ServiceSecured Or Contracted

50 MW

TVA buys plant output; Google receives clean-energy attributes.

Project map

0 of 1 project point mapped
Infrastructure facts
2
Mapped records
1
Capacity figures
2

No map point available

Power & interconnection: 2

Facts & sources

Published claims and their source links.

6 facts
Current Output
50 MWe
Fact
GoogleOur first advanced nuclear reactor project with Kairos Power and TVAKairos PowerGoogle, Kairos Power, TVA collaborate to meet America's growing energy needsKairos PowerKairos Power iterative development
Current Unit Count
1 reactor
Design
Kairos PowerClean Electricity for the Tennessee ValleyKairos PowerGoogle, Kairos Power, TVA collaborate to meet America's growing energy needsKairos PowerKairos Power iterative development
Operations Target
2030
Forecast
GoogleOur first advanced nuclear reactor project with Kairos Power and TVAKairos PowerGoogle, Kairos Power, TVA collaborate to meet America's growing energy needs
Ppa Status
Binding PPA between Kairos Power and TVA
Fact
Kairos PowerThe Time is NowGoogleOur first advanced nuclear reactor project with Kairos Power and TVAKairos PowerGoogle, Kairos Power, TVA collaborate to meet America's growing energy needs
Groundbreaking Date
2026-04-17
Actual
Kairos PowerThe Time is NowU.S. Department of EnergyOne Year After Executive Orders, U.S. Nuclear Energy Renaissance
Grid Delivery Structure
TVA grid injection with Google clean energy attributes
Fact
GoogleOur first advanced nuclear reactor project with Kairos Power and TVAKairos PowerGoogle, Kairos Power, TVA collaborate to meet America's growing energy needs