I’m suggesting that a used fuel storage technology jump is now ripe. Problems are opportunities. In abstract the technology of today is there to do the job, and lacks only a number of earnest competing efforts to make the jump in actual practice.
But these are — like the Carter years — chicken little times. Good that the Japanese have this problem, because they, as a culture, are not chicken littles.
Ultimately you'd like to get it to some centralized repository, maybe monitored retrievable storage, and eventually reprocessing. The Japanese do reprocess their used fuel. They do some on their own and also send some to the French facility at La Hague. But it's a slow process for approvals.
Maybe that's the best place to start. Streamline the useless regulations that are holding up the show on reprocessing...?