Chernobyl’s Monument to the Liquidators pays tribute to those who died. We designed a special high quality sticker with mat lamination, so we will never forget these difficult days. The Chernobyl disaster was a nuclear accident that occurred on 26 April 1986 at the No. 4 nuclear reactor in the Chernobyl Nuclear Power Plant, near the city of Pripyat in the north of the Ukrainian Soviet Socialist Republic.