Terrific piece of data journalism in the Guardian.

We have identified 33 serious incidents and accidents at nuclear power stations since the first recorded one in 1952 at Chalk River in Ontario, Canada.

The information is partially from the International Atomic Energy Authority – which, astonishingly, fails to keep a complete historical database – and partially from reports. Of those we have identified, six happened in the US and five in Japan. The UK and Russia have had three apiece.

Using Google Fusion tables, we’ve put these on a map, so you can see how they’re spread around the globe: