Have you already tried to look into the Severodvinsk shipyard, thru the google map ?
I have found a link on the Net. And you can acctually see a very detailed satelite picture and recognize some submarines around the port.
Typhoon:
http://maps.google.com/maps?t=k&ie=U...02137,0.007253
another one:
http://maps.google.com/maps?t=k&ie=U...02138,0.007253