{"docs":"https://www.nuclearnewsnetwork.com/tracker","terms":"History surfaces — append-only milestone logs, event/change feeds, and full JSON snapshots — are provided under the NNN Data License Terms (https://www.nuclearnewsnetwork.com/data-license): journalism, research, citation and AI answering are expressly permitted royalty-free with attribution; systematic bulk extraction, dataset redistribution, and embedding in commercial products or training corpora require a commercial license.","terms_url":"https://www.nuclearnewsnetwork.com/data-license","attribution":{"text":"Nuclear News Network, \"NNN Reactor Project Tracker\", https://www.nuclearnewsnetwork.com/tracker","url":"https://www.nuclearnewsnetwork.com/tracker"},"unit":{"slug":"hermes-2","name":"Kairos Hermes 2","plant":"Hermes 2 (Oak Ridge, TN)","unit":2,"country":"US","region":"north-america","reactor_type":"MSR","design":"Kairos KP-FHR (Hermes 2)","capacity_mw_net":50,"is_smr":true,"vendor":"Kairos Power","owner_operator":"Kairos Power","status":"under_construction","construction_start":"2026-04-17","original_cod_target":2030,"current_cod_estimate":2030,"milestones":[{"date":"2026-04-17","event":"Kairos Power broke ground on the Hermes 2 demonstration plant.","source":"https://www.kairospower.com/updates/kairos-power-breaks-ground-on-hermes-2-demonstration-plant"}],"sources":["https://www.nrc.gov/facilities-safety/non-power-facilities/new-facility-licensing/hermes-2-kairos-application","https://www.kairospower.com/updates/kairos-power-breaks-ground-on-hermes-2-demonstration-plant","https://blog.google/company-news/outreach-and-initiatives/sustainability/google-first-advanced-nuclear-reactor-project-with-kairos-power-and-tennessee-valley-authority/"],"last_verified":"2026-10-07","verified":true,"confidence":"high","notes":"Power-unit capacity is up to 50 MWe at the plant level; NRC describes two 35 MWth low-power test reactors sharing a steam conversion system. Google reports operation scheduled for 2030. Site id omitted because no Oak Ridge site record exists in the entity registry.","tags":["advanced-reactor","smr","under-construction"],"updated_at":"2026-10-07","slippage_years":0}}