{"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":"brest-od-300","name":"BREST-OD-300","plant":"Seversk (SCC)","unit":1,"country":"RU","region":"asia","reactor_type":"LFR","design":"BREST-300","capacity_mw_net":300,"is_smr":false,"vendor":"Rosatom","owner_operator":"Rosatom (SCC)","vendor_id":"org:rosatom","owner_operator_ids":["org:siberian-chemical-combine"],"design_id":"design:brest-od-300","site_id":"site:seversk-pdec","status":"under_construction","construction_start":"2021-06-08","original_cod_target":null,"current_cod_estimate":2028,"milestones":[{"date":"2021-06-08","event":"Construction start (first concrete)","source":"https://pris.iaea.org/pris/"},{"date":"2026-06-16","event":"Listed as under construction in the WNA world table, grid connection estimated 2028","source":"https://world-nuclear.org/information-library/current-and-future-generation/plans-for-new-reactors-worldwide"},{"date":"2026-05-19","event":"Turbine/generator foundation concreting begins (3 stages, >620 m3, 36 spring elements; unit delivered end-2025)","source":"https://www.world-nuclear-news.org/articles/concrete-poured-for-brest-od-300-turbine-foundation"},{"date":"2026-06-30","event":"Pipeline system connecting central and four peripheral cavities completed; first lead-coolant circuit closed (H1 2026; exact date N/A)","source":"https://www.neimagazine.com/news/internal-cavity-concreting-for-brest/"}],"sources":["https://world-nuclear.org/nuclear-reactor-database/summary/report?report=gen&status=Under%20Construction","https://pris.iaea.org/pris/","https://www.world-nuclear-news.org/articles/concrete-poured-for-brest-od-300-turbine-foundation","https://www.neimagazine.com/news/internal-cavity-concreting-for-brest/"],"last_verified":"2026-09-28","verified":true,"confidence":"medium","notes":"COD tension: NEI May 2026 reports launch postponed 2026->2029 with vessel ~70% assembled — single source, current COD estimate 2028 unchanged pending corroboration. Control-room simulator commissioned Jul 2026 (WNN, single source). Internal-cavity concreting first stage Sep 2026 (NEI, single source).","tags":["ru","brest-300"],"updated_at":"2026-09-28","slippage_years":null}}