Chernobyl disaster other undamaged reactors at the power station, with No. 3 continuing to produce electricity up into 2000. The accident motivated safety upgrades on all remaining Soviet-designed reactors in the RBMK (Chernobyl No. 4) family, of which eleven continued to power electric grids . The disaster began during a systems test on 26 April 1986 at reactor 4 of the Chernobyl plant near Pripyat and in proximity to the administrative border with Belarus and the Dnieper River. There was a sudden and unexpected power surge. When operators attempted an emergency shutdown, a much larger spike in power output occurred. This second
Deaths due to the Chernobyl disaster by the accident are small compared to background rates of cancer. Theoretical estimates must rely instead on controversial models such as LNT or hormesis models. In the list following are 37 people whose deaths are officially directly attributable to the Chernobyl disaster. Of these, two died at the scene, four died in a single helicopter accident, 29 died within a few months of Acute Radiation Syndrome (ARS) and three died later from medical complications possibly caused by the accident. Of these people, one was a cinematographer, one a physician, five military personnel (four in a single helicopter), seven firefighters, two