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
20th-century philosophy 20th-century philosophy 20th-century philosophy saw the development of a number of new philosophical schools—including logical positivism, analytic philosophy, phenomenology, existentialism, and poststructuralism. In terms of the eras of philosophy, it is usually labelled as "contemporary philosophy" (succeeding modern philosophy, which runs roughly from the time of René Descartes until the late 19th to early 20th centuries). As with other academic disciplines, philosophy increasingly became professionalized in the twentieth century, and a split emerged between philosophers who considered themselves part of either the "analytic" or "Continental" traditions. However, there have been disputes regarding both the terminology and the reasons behind the