Pack Version:
2dd8f8a

Description:
There seems to be no available way to reprocess depleted fuels for advanced nuclear material. Is it caused by the scripts being broken on my end or the part is actually being reworked since I'm sure those things were obtainable but somehow that's not the fact now.

Expected Behavior:
Get the items mentioned above to proceed.

Steps To Reproduce:
Check JEI.

Plus I do updated my NuclearCraft version from 2.18y to 2.18z, I'm not sure if a downgrade would fix this.

I'm pretty sure there's something wrong with your scripts/instance. I am able to reprocess fuels in 307ceaa.
(TBU)

@ghzdude Can you send me a copy of your nuclearcraft.cfg if possible? Thanks

Here it is, but I had to change the file extension from .cfg to .txt since github doesn't support .cfg files.
nuclearcraft.txt

It is not advisable to update mods in the pack yourself, since you will likely run into issues like broken scripts. When we update mods, we check to see what has changed and adjust the scripts or configs to ensure everything continues working as before.

Proved to be caused by 2.18z. Downgrading to 2.18y fixes this.