Russia has a nuclear triad. Unless all of their submarines were in port and taken out during the attack, there’d be no way to prevent them from losing all three delivery mechanisms simultaneously.
Russia hasn't spent enough in their military to afford nuclear maintenance in decades. They don't have nuclear weapons any more, they're just faking it at this stage.
It’s an elephant in the room, and I have a strong impression not everyone acknowledges it.
And there worst part of the triad, ICBMs, can't really be taken out easily by any method I can imagine. And they are nearly impossible to intercept, even by the US.
A giant, incredibly detailed documentation ppackage, down to what posters are on what walls in what rooms were leaking in western media the other day.
Even if you know the location of every single one, you can't easily destroy them. They all have very heavy armored covers. They are probably all guarded by the military.