{"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":"saeul-3","name":"Saeul-3 (ex Shin-Kori 5)","plant":"Saeul","unit":3,"country":"KR","region":"asia","reactor_type":"PWR","design":"APR1400","capacity_mw_net":1340,"is_smr":false,"vendor":"KEPCO E&C","owner_operator":"KHNP","epc":"Doosan Enerbility (NSSS) + Samsung C&T / Hanwha civil consortium","vendor_id":"org:kepco-enc","owner_operator_ids":["org:khnp"],"epc_ids":["org:doosan-enerbility","org:samsung-cnt","org:hanwha-corporation"],"design_id":"design:apr1400","site_id":"site:saeul","status":"commissioning","construction_start":"2017-04","original_cod_target":null,"current_cod_estimate":2026,"milestones":[{"date":"2026-06-16","event":"Listed as under construction in the WNA world table, grid connection estimated 2026","source":"https://world-nuclear.org/information-library/current-and-future-generation/plans-for-new-reactors-worldwide"},{"date":"2025-12-19","event":"NSSC grants operating licence (5-1 vote) after 5+ year review","source":"https://www.powermag.com/saeul-3s-nine-year-nuclear-odyssey-to-operation/"},{"date":"2026-01-20","event":"Initial fuel loading ceremony (first APR1400 fuel load at Saeul 3&4)","source":"https://www.powermag.com/saeul-3s-nine-year-nuclear-odyssey-to-operation/"},{"date":"2026-04-12","event":"First criticality ('first start') — stable self-sustaining chain reaction (KHNP)","source":"https://www.powermag.com/saeul-3s-nine-year-nuclear-odyssey-to-operation/"},{"date":"2026-08-11","event":"Automatic reactor shutdown during 80%-power transmission-trip test; NSSC investigation team dispatched; commercial operation (targeted Oct 2026) expected to slip (ministry notice via MK News)","source":"https://www.mk.co.kr/en/economy/12126840"}],"sources":["https://world-nuclear.org/information-library/current-and-future-generation/plans-for-new-reactors-worldwide","https://pris.iaea.org/pris/","https://pris.iaea.org/PRIS/CountryStatistics/CountryDetails.aspx?current=KR","https://www.powermag.com/saeul-3s-nine-year-nuclear-odyssey-to-operation/","https://www.mk.co.kr/en/economy/12126840"],"last_verified":"2026-09-28","verified":true,"confidence":"medium","notes":"Status moved to commissioning 2026-09-28 (fuel loaded + critical + power ascension; 9th APR1400 to reach criticality worldwide). Nine-year odyssey: 2017 Moon-era halt at 28.8%, 471-citizen jury resumption vote Oct 2017, Gyeongju-quake seismic upgrades, aircraft-impact/air-cooled-generator design adds. Apr-22 auxiliary-building smoke incident + Aug-4 turbine-system issue (both non-nuclear-island, per PowerMag/NSSC). Commercial target Oct 2026 at risk after Aug-11 trip — watch.","tags":["kr","apr1400"],"updated_at":"2026-09-28","slippage_years":null}}