CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins90% CONFIDENCEOverall confidence: 90%How well the pin's source and references back up its dates.Weighted average of how firmly 3 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better
Ukraine's Chornobyl NPP states it accepted the New Safe Confinement's Enclosing Perimeter into operation on 8 November 2017 (chnpp.gov.ua[2]).Ukraine's Chornobyl Nuclear Power Plant formally accepted the New Safe Confinement's Enclosing Perimeter from builder Novarka, completing the giant arch meant to contain the ruined Reactor 4 for a century. The 36,000-tonne steel structure, the largest movable land-based structure ever built, had been skidded into place over the old sarcophagus in November 2016.
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