I read it but it does not mention a 100% off load of fuel during the maintenace cycle.
An earlier post by peachie stated the following from a WANO Update (is the update accurate...*shrugs*)
"Miscellaneous Information—The number of spent fuel assemblies in the spent fuel
pool of each unit is as follows:
Unit : number / capacity
Unit 1: 292 / 900
Unit 2: 587 / 1240
Unit 3: 514 / 1220
Unit 4: 1331(*) / 1590
Unit 5: 946 / 1590
Unit 6: 876 / 1770
Common (Shared) fuel pool: 6375 / 6840
(*) 1331 includes 783 spent fuel assemblies and 548 unloaded from the reactor for the inspection."
This would seem to make sense for Unit 4 if it was preparing for, or performing, in-core inspections...if I recall correctly, there use to be a 10 year in-core ISI inspection that required a complete fuel offload...heck, one inspection resulted in a diver going into the vessel and I know we did a full core offload for that.
I am not a planner, but I would think the scheduled maintenance and plant capabilities would dictate either full off-load or in-core shuffle.