On: This Girl Snuck Into a Russian Military Rocket Fac...

[arctangent]

The "Chernobyl biker" was/is Elena Filatova a.k.a. "KiddOfSpeed":

http://en.wikipedia.org/wiki/Elena_Filatova

I believe this thread is where the hoax was first exposed:

http://www.uer.ca/forum_showthread_archive.asp?threadid=8951