According to this summary, Germany has lots of remaining problems with its prototype pebble bed reactors: https://web.archive.org/web/20170329044120/http://nuri

According to this summary, Germany has lots of remaining problems with its prototype pebble bed reactors: https://web.archive.org/web/20170329044120/http://nuris.org/wp-content/uploads/2015/04/Moormann_Decommissioning-problems-of-German-pebble-bed-reactors.pdf https://web.archive.org/web/20170329044120/http://nuris.org/...