{"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":"haiyang-4","name":"Haiyang-4","plant":"Haiyang","unit":4,"country":"CN","region":"asia","reactor_type":"PWR","design":"CAP1000","capacity_mw_net":1150,"is_smr":false,"vendor":"SPIC (CAP1000)","owner_operator":"SPIC","vendor_id":"org:spic","owner_operator_ids":["org:spic"],"design_id":"design:cap1000","site_id":"site:haiyang","status":"under_construction","construction_start":2023,"original_cod_target":null,"current_cod_estimate":2027,"milestones":[{"date":"2025-06-24","event":"Reactor internals (260 t) hoisted into reactor building (RPV installed November 2024)","source":"https://www.world-nuclear-news.org/articles/reactor-internals-installed-at-haiyang-4"},{"date":"2025-09-06","event":"Inner steel containment vessel top head (658 t, ~40 m diameter) installed; nuclear island shifted from civil works to installation","source":"https://www.world-nuclear-news.org/articles/inner-containment-dome-in-place-at-haiyang-4"},{"date":"2026-02-09","event":"External containment steel dome hoisted into position","source":"https://www.nucnet.org/news/china-announces-progress-at-three-nuclear-construction-sites-2-1-2026"},{"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":"2026-06-29","event":"CB-20 containment water tank module (419 t) installed — last large module; Haiyang Phase II entered installation and commissioning phase","source":"https://www.world-nuclear-news.org/articles/final-module-installed-at-haiyang-4"}],"sources":["https://world-nuclear.org/information-library/current-and-future-generation/plans-for-new-reactors-worldwide","https://pris.iaea.org/pris/","https://www.world-nuclear-news.org/articles/final-module-installed-at-haiyang-4","https://www.nucnet.org/news/china-announces-progress-at-three-nuclear-construction-sites-2-1-2026","https://www.world-nuclear-news.org/articles/inner-containment-dome-in-place-at-haiyang-4","https://www.world-nuclear-news.org/articles/reactor-internals-installed-at-haiyang-4"],"last_verified":"2026-09-15","verified":true,"confidence":"high","notes":"On schedule for 2027 commercial operation (56-month plan from April 2023 first concrete). Trajectory mirrors Haiyang-3 with ~10 months lag: external containment dome Feb 2026 vs Mar 2025 for unit 3; final CB-20 module Jun 2026 vs Aug 2025. Milestones are SPIC/CNNC announcements corroborated by World Nuclear News and NucNet.","tags":["cn","cap1000"],"updated_at":"2026-09-15","slippage_years":null}}