Who reported about that 82 warheads?
Same people who still say all Russians wear fur-hats and we have to beware of the bears in the streets?
Any "missing" warhead will mean that all the people responsible for it, including military district commander and defence minister will be fired and put under investigation.
Believe me, the level of security in this field is hard to imagine.
My friend served in "special cargo guard" service of Internal troops, stationed in Arzamas-16, the National nuclear research center. He told many interesting thing about it. He was a only a sergeant, but he still can't get a foreign passport and go abroad, only because he saw the ID cards for the weapon factory personell...