Since I have negative karma, I might as well just continue down the path ...
I just love it when 'all knowing' HPs spout their expertise when it comes to a very complicated and technical issue such as the management of spent nuclear fuel.
To set the receord straight, each canister vendor has specific technical specification limits on both the fuel assembly individual thermal and total thermal heat load in a specific canister. Also damaged fuel puts further restrictions on the canister.
For the most part, recently discharged spent fuel has to cool a minimum of five (5) years before it can even be considered to be loaded into a canister. And if a utility really wants to load this thermally 'hot' fuel it must 'mix' it with 'cold' fuel to ensure that the total kW load for the canister design is not exceded. So to put it mildly, the majority of the SFPs will not be emptied in the very near future. There are also some logistical issues such as licensing, NRC approval, limited fabrication, cost, etc that due impact going all dry.
Something else that should be known, Oak Ridge did a study a few backs that concluded that if the equivalent of 16,000 (yes, 16,000) fuel assemblies, not fuel rods were 'shattered' after having cooled in a SFP for at least six (6) months, that the dose to the public at the site perimeter would be negligible. In other words old cold fuel is not that big a problem. Fukushima 1, 2 & 3, had recently dumped hot fuel into the SFP and that is the real reason that they had an issue with SFP cooling.
FInally, there is also the issue of the infamous zirc fire. Again, this is not as significant an issue as the press makes it to be. Studies were done for a number of the D&D units in the northeast, and it was not a major problem.
Latly, during the Millstone Unit 1 'aborted' D&D, a test was done of the SFP to determine if all SFP cooling were lost would the SFP 'boil'. The answer was NO. All cooling was shut off and the it was concluded that the temperature in the SFPS would not rise even during the hot and humid Connecticut summers.