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B2Master agreementNeeds verification
Google – Kairos advanced reactor fleet
Announced Oct 14, 2024Multiple sites, not disclosedAug 3, 2026

Firm capacity

Not disclosed

Optioned capacity

450 MW

Evidence assessment
What the public record supports, without upgrading incomplete claims.

Optioned MW excludes the separately listed 50 MW Hermes 2 PPA to prevent double counting against the 500 MW fleet ceiling.

Record history
Milestones remain visible when later evidence supersedes them.
  1. Announced

    Oct 14, 2024

  2. Updated

    Aug 18, 2025

    Kairos and TVA signed the first project PPA for the 50 MW Hermes 2 deployment.

Primary evidence
Open the cited record and verify the claim at its source.

Google signs advanced nuclear clean energy agreement with Kairos Power

Google · Oct 14, 2024

Supports: Multi-reactor purchase agreement, up to 500 MW, first deployment target of 2030, and fleet target through 2035.

Open source

Kairos Power and Google

Kairos Power · Oct 14, 2024

Supports: Master Plant Development Agreement description and identification of Hermes 2 as the first 50 MW deployment.

Open source