A plutonium-239 based atomic warhead remains valid through 18 years.
Russia stopped production of military-grade plutonium in 1991. It’s been 31 years.
A uranium-235 based atomic warhead lasts 30 years.
Russia stopped producing nuclear uranium in 1990. It’s been 32 years.
Russia conducted their last live ammo tests of nuclear weaponry in 1990. It’s been 32 years.
