1986 - Hamm-Uentrop, Germany - THTR 300 Experimental Reactor Meltdown, Radiation Released

4 May 1986 - Hamm-Uentrop, Germany - Fuel damaged

"Spherical fuel pebbles became lodged in the pipe used to deliver fuel elements to the reactor at an experimental 300-megawatt THTR-300 HTGR. Attempts by an operator to dislodge the fuel pebble damaged the pipe, releasing activated coolant (radioactive) gas which was detectable up to two kilometers from the reactor.[43]"

http://energy.about.com/od/nuclear/a/12-Nuclear-Reactors-That-Have-Had-Meltdowns_2.htm

Although the word meltdown is not used, by reading between the lines, a common sense interpretation of what they are saying is that this nuclear reactor melted down. It is not possible to have 'damaged fuel' and radioactive gas detectable 2 kilometers away, without a meltdown happening, wouldn't you agree? 

This is another example of how the nuclear industry tries to hide and cover up what is really going on in the industry through word smithing, spin, and outright hiding the information. Most pro nuclear apologists still persist in saying that there have only been 3 nuclear reactor melt downs historically, so that makes this industry safe. 

End

1986 - Hamm-Uentrop, Germany - THTR 300 Experimental Reactor Meltdown, Radiation Released; via @AGreenRoad
http://agreenroad.blogspot.com/2014/04/1986-hamm-uentrop-germany-thtr-300.html