This is 18 months old, but I have never seen or heard of it before and I thought it was pretty interesting. Worth a few minutes even if it is a bit of an advertisment.
http://www.wimp.com/encasechernobyl/
Looks like some pretty awesome engineering involved in that project.
http://www-pub.iaea.org/MTCD/publications/PDF/te_1240_prn.pdf
Present and future environmental
impact of the Chernobyl accident.
RW