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File:Worldwide Nuclear Power Capacity Factors.png

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English: This is a graph of averaged yearly capacity factors from 1970 through 2016 for all 670 reactors in the International Atomic Energy Agency (IAEA) Power Reactor Information System (PRIS) database. While the PRIS database does not track any metric called the "capacity factor", it does track a metric called the "load factor", which is generally considered to be directly equivalent to the capacity factor, and is what is graphed here. All data was obtained from the PRIS website via web scraping, manipulated via a Ruby script into a usable CSV format, then imported into, explored via, and ultimately graphed in Excel. No usable global-level data was available prior to 1970, and no data has been released for 2017 yet, so this image contains all available data on nuclear capacity factors. The slump in capacity factors starting after 2010 is solely due to Japan's precautionary shutdown of all nuclear reactors following the Fukushima Daiichi incident - PRIS still considers all of Japan's reactors to still be operable (and is still computing annual performance data for them), which is severely distorting the performance data for the rest of the world's nuclear fleet. When Japan's reactors are eliminated from the dataset, the slump in capacity factors post-2010 vanishes entirely.
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Author Garzfoth

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12 September 2017

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