The Three Mile Island accident on March 28th 1979 pretty much killed the expansion of the Nuclear Power Industry in the United States. By 1980, 51 nuclear power plants that were approved were cancelled before construction even began. The nuclear power plants that were already under construction faced enormous opposition, costly safety reviews and much longer construction times than the nuclear power plants prior to the Three Mile Island accident. These factors caused an extra twenty years of delays in getting the Seabrook power plant to go on line. Seabrook was the last new nuclear power plant to begin operation in the United States.
So Chernobyl had no effect at all in the United States. Nuclear power was for all intents and purposes, dead already. However, new nuclear power plants continued to be built in Europe and East Asia, until Chernobyl practically ended the opening of new nuclear power plants in the rest of the world for the next twenty years. The growing concerns over global warming caused a brief renaissance in nuclear power after 2006, but the Fukushima nuclear power plant disaster of 2011, has severly curtailed this new enthusiasium for nuclear power, out side of China. Japan and Germany are speeding up their plans to shut down their nuclear power plants.
Outside of the Soviet Union, Chernobyl had a surprisingly small impact on the nuclear power industry. It had some impact, but Three Mile Island and the Fukushima incidents have had even more dire impacts on nuclear power.
Sources: "Siemans to quit the Nuclear Industry" BBC News 3/18/2011
http://www.nytimes.com/2014/04/29/us/three-mile-island-and-nuclear-hopes-and-fears.html?_r=0