Nuclear staffing is indeed an issue. As I understand it, standard weapons-grade purity is 93%. I'm not a nuclear expert, but I would assume that the decay process slowly but continually degrades it. We are all assuming that the Uranium-235 and Plutonium-239 (and the Tritium and other compounds to support the primary implosion) are being properly maintained in our nuclear arsenal - but are they? We could find ourselves with a massive arsenal of duds on our hands. Can you imagine diplomacy without the backing of a viable arsenal?
BTW the Chinese nukes are fairly new, since they stole the technology from us just over a decade ago.
We can make mixed oxide fuel MOX using Pu-239 and other stuff. Reprocessing spent fuel and using fast breeder technology will give us fuel for unlimited electric generation. Just the ticket for heating homes, powering industry, and making oil from coal, shale, and sands. My cars need fuel.
Remember loose lips sink ships. One never knows who is reading this stuff.
On a side note, did you know that one of the reasons domestic fissile material production is way down and incapable of meeting our current needs(we import that too) is that we made an arrangement with Russia back in 1993 to buy their weapons grade material. Not saying we shouldn’t have done it, but food for thought.