{"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":"sanmen-4","name":"Sanmen-4","plant":"Sanmen","unit":4,"country":"CN","region":"asia","reactor_type":"PWR","design":"CAP1000","capacity_mw_net":1150,"is_smr":false,"vendor":"SPIC (CAP1000)","owner_operator":"CNNC","vendor_id":"org:spic","owner_operator_ids":["org:cnnc"],"design_id":"design:cap1000","site_id":"site:sanmen","status":"under_construction","construction_start":2023,"original_cod_target":null,"current_cod_estimate":2027,"milestones":[{"date":"2023","event":"Construction start (first concrete)","source":"https://pris.iaea.org/pris/"},{"date":"2025-12-31","event":"Reactor building dome hoisting completed; unit transitioned into installation phase (CNNP 2025 annual report)","source":"https://vip.stock.finance.sina.com.cn/corp/view/vCB_AllBulletinDetail.php?stockid=601985&id=12278069"},{"date":"2026-04-26","event":"460-tonne CB20 module hoisted into place; final large-module lift of Sanmen Phase II","source":"https://www.in-en.com/tag/%E4%B8%89%E9%97%A8%E6%A0%B8%E7%94%B5"},{"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"}],"sources":["https://world-nuclear.org/information-library/current-and-future-generation/plans-for-new-reactors-worldwide","https://pris.iaea.org/pris/","https://vip.stock.finance.sina.com.cn/corp/view/vCB_AllBulletinDetail.php?stockid=601985&id=12278069"],"last_verified":"2026-09-15","verified":true,"confidence":"medium","notes":"In installation phase: reactor building dome hoisted 2025-12-31 and final large-module (CB20) lift 2026-04-26 per CNNC/CNNP disclosures. CNNP 2025 annual report (as of 2026-03-31) lists planned commercial operation 2027 — earlier than the WNA/PRIS 2028 estimate; COD set to operator target 2027 pending independent confirmation. Dome and module milestones trace to CNNC corporate sources.","tags":["cn","cap1000"],"updated_at":"2026-09-15","slippage_years":null}}