At first glance at your recipes, there's is absolutely no net consumption of Acid. I think there should be a little bit of loss.

I'll likely never change this. This is a new type of logistics challenge I call "conservation puzzle". It shows up here and in another part of my chemical mod.

To be clear: there most certainly is a net consumption of acid in nuclear fuel production, but, there is always a set amount that gets retained. That is the amount of hydrofluoric acid that is contained within the nuclear oxides. 60 HF (liquid) --> 1 hexafluoride (solid) --> 60 HF, 6-to-1 but I follow the game's convention of using 10 fluids for every solid. You get THAT back. It still eats plenty of acid during production, overall: you can choose whether to eat sulfuric or hydrofluoric acid. If memory serves, the hex retains about 25% of the acid that originally went into the production of that hex.

You can also turn the oxides into hex and back again without losing that HF. That might be the part you're looking at. You will have to use acid when you first produce the hex from raw ore, but you don't have to add more to transform between types. You can recycle what's in the hex. There is also some acid consumed during reprocessing.

Oh, so there is met loss over the process? That's good. Guess it WAS just a glance over the recipes.

After running a nuclear device for some time, I see that there is a net loss of acid - Quite a bit actually.

On a different note, what am I supposed to be doing with all of that depleted urania?

You can use it to make weapons. But I still end up with a lot of it. Should I make a recipe to make steel out of it? It's used in construction of certain things that require shielded steel (e.g. reactors). This is a realistic usage. But even with making massive arsenals it's a problem. The problem is that you're getting a realistic amount of depleted urania. In real life we mostly just store it because while it's not terribly radioactive it is chemically toxic. If it weren't so toxic to humans it would make great steel. I am open to suggestions.

I don't have enough targets to shoot for it all to be made into weapons.

BTW, after I had another look at the numbers of nuclear, it's not that much more powerful than it is in vanillla, is it?
raw output is about twice as strong, but the combined efficiency rating diles it back to roughly the same value.

I'm pretty sure on a per ore basis it's about 25 times more energetic, but I don't believe it's any more powerful in terms of per turbine end-point electricity output. I have the calculations somewhere. Essentially I think the fuel under this mod on a per ore basis lasts about 25 times as long, but it becomes complicated what that means in terms of a single fuel unit, since so much more ore is used to make the fuel, and there are a few recipes involved.

I think that you should include a function that replaces existing instances of U238/235 in recipes with LEU\HEU items.
As well as hide the recipe unlocks from the technologies.

Also, would you like me to make a Deadlock stacking bridge for your mod? I'll need to modify the item icons to create stacked variants.

One more thing, I'm not sure I'm a fan of the longer fuel cell thing makes steam buffering that much more difficult.

I thought I sort of did that... but I may have actually done it manually with this mod, so it wouldn't crawl through items outside of the vanilla stuff and other mods I used. I think that's a great idea and my factorio library has functions for crawling recipes and replacing items, now... I hadn't developed that yet when I made this mod. So duly noted.

Regarding expanding on the mod: yes, of course. Edit anything you want. All of my work is in the public domain and I included licenses with my mod archives for licensed stuff I used that other people made.

Overall, I wouldn't mind a DU into steel recipe, even if it's terribly inefficient. At least some sink for it is needed.

DU --> Steel is being planned for next release.

Recipe added, I think.