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
Chernobyl necklace of thyroid cancer may require surgery. The surgery may leave the patient with one or two horizontal scars at the base of the neck, dubbed the Chernobyl necklace. After the Chernobyl disaster, incidents of thyroid cancer among civilians in Belarus, Ukraine, Russia, and Poland have risen sharply. It is estimated that many of those affected have the necklace, however, no statistical information of the affected population exists at this time. See the article on Chernobyl disaster effects for details. After the Fukushima Daiichi nuclear disaster, experts including Robert Alvarez and Natalia Manzurova believe that Japan faces a similar situation: its