{"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":"changjiang-4","name":"Changjiang-4","plant":"Changjiang","unit":4,"country":"CN","region":"asia","reactor_type":"PWR","design":"Hualong One","capacity_mw_net":1090,"is_smr":false,"vendor":"CNNC","owner_operator":"Huaneng & CNNC","vendor_id":"org:cnnc","owner_operator_ids":["org:huaneng","org:cnnc"],"design_id":"design:hualong-one","site_id":"site:changjiang","status":"under_construction","construction_start":2021,"original_cod_target":null,"current_cod_estimate":2027,"milestones":[{"date":"2026-06-16","event":"Listed as under construction in the WNA world table, grid connection estimated 2027","source":"https://world-nuclear.org/information-library/current-and-future-generation/plans-for-new-reactors-worldwide"},{"date":"2025-04","event":"Main circulation pipeline welding completed for Changjiang-4","source":"https://www.nucnet.org/news/outer-steel-dome-lifted-into-place-for-china-s-changjiang-4-nuclear-plant-4-3-2026"},{"date":"2026-04-13","event":"Outer steel containment dome lifted into place at Changjiang-4","source":"https://www.nucnet.org/news/outer-steel-dome-lifted-into-place-for-china-s-changjiang-4-nuclear-plant-4-3-2026"},{"date":"2026-06-22","event":"Nuclear loop flushing begun at Changjiang-4 (prelude to cold/hot testing)","source":"https://www.world-nuclear-news.org/articles/flushing-work-under-way-for-changjiang-unit-4"},{"date":"2026-08-06","event":"Secondary-loop combined hydrostatic test completed (witnessed by Huaneng + constructors; prerequisite for cold tests)","source":"https://en.cinie.net/article/58947.html"},{"date":"2026-08-10","event":"Main control room commissioned (ceremony Jul 31); new stage in commissioning and operation (CNNC)","source":"https://www.world-nuclear-news.org/articles/changjiang-4-control-room-commissioned"},{"date":"2026-09-08","event":"Cold functional tests completed; unit officially enters commissioning phase — hot testing, fuel loading and grid connection next (CNNC)","source":"https://www.world-nuclear-news.org/articles/key-commissioning-tests-completed-at-changjiang-4"}],"sources":["https://world-nuclear.org/information-library/current-and-future-generation/plans-for-new-reactors-worldwide","https://pris.iaea.org/pris/","https://www.nucnet.org/news/outer-steel-dome-lifted-into-place-for-china-s-changjiang-4-nuclear-plant-4-3-2026","https://www.world-nuclear-news.org/articles/flushing-work-under-way-for-changjiang-unit-4","https://www.world-nuclear-news.org/articles/key-commissioning-tests-completed-at-changjiang-4"],"last_verified":"2026-09-28","verified":true,"confidence":"high","notes":"Verified 2026-09-28: outer dome Apr 2026 (NucNet/CNNC), flushing Jun 2026, control room Aug 2026 and cold tests Sep 2026 (WNN/CNNC). Hydrostatic test Aug 2026 is CINIE-single-source — recorded as medium-grade within a high-confidence file. Both phase-II units due fully operational early 2027; sister unit Changjiang-3 entered commercial operation 2026-09-17 (WNN).","tags":["cn","hualong"],"updated_at":"2026-09-28","slippage_years":null}}