Several satellites with nuclear reactors have even crashed.  Luckily, most appear to have ended up in the ocean, but here is a more scary example [1].  Here is a map of the area with potential debris that I found hidden away over at Wikimedia Commons [2].<p>[1]: <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Kosmos_954" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Kosmos_954</a><p>[2]: <a href="https:&#x2F;&#x2F;upload.wikimedia.org&#x2F;wikipedia&#x2F;commons&#x2F;7&#x2F;7c&#x2F;Cosmos-954_Map.png" rel="nofollow">https:&#x2F;&#x2F;upload.wikimedia.org&#x2F;wikipedia&#x2F;commons&#x2F;7&#x2F;7c&#x2F;Cosmos-9...</a>