The present World Nuclear Industry Status Report 2010-2011 was to be published at the occasion of the 25th anniversary of the Chernobyl disaster in Ukraine. The report provides the reader with the basic quantitative and qualitative facts about nuclear power plants in operation, under construction, and in planning phases throughout the world. It assesses the economic performance of past and current nuclear projects and compares their development to that of leading renewable energy sources. An extensive annex provides a country-by-country analysis of nuclear programs around the world. The report also includes the first published overview of reactions to the catastrophe in Japan. But developments even prior to March 11, when the Fukushima crisis began, illustrate that the international nuclear industry has been unable to stop the slow decline of nuclear energy. Not enough new units are coming online, and the world's reactor fleet is aging quickly. Moreover, it is now evident that nuclear power development cannot keep up with the pace of its renewable energy competitors.