Editing Chernobyl Nuclear Power Plant (section)

=== 1984 reactor #3 and #4 incident ===
According to [[KGB]] documents declassified in Ukraine on 26 April 2021,<ref>{{Cite web|last=Головина|first=Светлана|date=2021-04-26|title=СБУ рассекретила новые документы о катастрофе на Чернобыльской АЭС|url=https://tvzvezda.ru/news/20214261358-yMZcQ.html|access-date=2021-05-03|website=Телеканал «Звезда»|language=ru|archive-date=2021-05-03|archive-url=https://web.archive.org/web/20210503132906/https://tvzvezda.ru/news/20214261358-yMZcQ.html|url-status=live}}</ref> serious incidents occurred in the third and fourth reactors in 1984. According to these documents, the central government in Moscow knew as early as 1983 that the powerplant was "one of the most dangerous nuclear powerplants in the USSR". The reasoning behind this had to do with the building's structural integrity. The room which housed the steam separators would reach temperatures as high as 270 degrees Celsius. This excess heat caused the concrete of the building to shift its position, which made the building unsafe and could potentially result in the collapse of the steam separators, which would cause it to collapse onto the reactor hall, causing a meltdown.