With certain combinations of mods, the Concrete Mix replacement for some recipes (Nuclear reactor and Centrifuge in vanilla) is disabled.
The minimum set I've found is:
SA(2.0.76)+Crushing Industry(0.5.10)+Tenebris Prime(1.3.8)+Age of Production(1.8.2)+depended by them

Additional recipes from other mods are also affected. The ones I found are Craptonite wall of Rubia and Deep miner of Lignumis. If installed individually, they will be replaced correctly.

This is likely intended behavior. It happens because the system won't add concrete mix to a recipe if an assembling machine that can craft it doesn't have enough fluid inputs to support the extra fluid. If you don't care about this and you know which machines are the culprits, you can add them to the "Machines to Ignore" startup setting (you need the internal name, not the localized name).

That said, this has come up a good number of times, and it's admittedly quite unclear why this happens. I'll think about a way to improve it.

Previously, even with this combination, these recipes would properly require concrete mix. Today, after updating the MODs along with the base game update, these recipes had changed.
(Sorry, I don’t know the versions of the previous MODs. However, I do update them regularly, and I think the last update was about one or two months ago.)

If this is intended behaviour, then I suppose it’s fine. However, if that’s the case, it’s problematic that things keep changing so frequently just because I updated the version slightly.

Yeah I don't like that recipes are changing between versions, but fortunately you can easily change the version you have enabled to the previous one with the drop-down (assuming you didn't switch computers or intentionally delete the old zip). I absolutely encourage doing that in this case, because I absolutely get it.

And these changes are objectively improvements in the long run, so I would much rather make forward progress than let known bugs and softlocks slide.

Thank you. I didn’t realize that different versions of the same mod could coexist. If I’d known that, testing would have been much easier.

I just checked, and when I rolled back to version 0.5.6, the issue disappeared. The same problem occurred in version 0.5.7 and later.

I understand that this is an ambitious patch and that the implementation requires careful consideration of the delicate internal processes of other mods and the base game. Even so, recipes should be as stable as possible, and I would like the decision to replace them with concrete mix to be based on consistent, explicit criteria whenever possible. I look forward to future improvements.