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No, it's zero emission but not renewable.
Nuclear fission is actually by definition the least renewable energy source. Even coal and oil are renewable on long enough time scales. But there will never be more uranium than there is right now.
We actually don't have that much of it if we consider the long term future, only a thousand years or so. So nuclear is intended to be a bridge to eventual full renewable power generation and storage, an essential component in the present day but it's still a bridge.
Another thing to consider is that nuclear is the only power source that works in deep space away from the Sun. So if we're serious about exploring the solar system or further, we'd be best not to burn up all of our fissionable material right away.
But if you go according the strict physical principle every energy source is non-renewable
The sun fuses a finire amount of hydrogen, earth has a finire amount of latent heat, the moon a finire amount of gravitational inertia etc.
And there's a little paradox if you think about it, how can fusion be non-renewable but solar, that use radiation from the sun fusion, be renewable?
A bit of a stretch maybe, but I'm considering us to be discussing whether an energy source is renewable on Earth. The Sun is not renewable, but by the time that it's no longer viable the Earth will be long gone as well! So as long as the Earth exists, I would say that solar PV and other solar driven processes like wind and hydro are renewable.
By these standards yes, deep geothermal and tidal are "not renewable" either.
But that's exactly the "problem", there's enough fertile material for potential millions of years of consumption, and that's for fission alone.
I think the debacle is more because the definition of "renewable" is a little arbitrary than the dilemma if nuclear is renewable or not
I think we both agree on fertile material as discussed in another comment, the longevity issue is mostly with conventional LWRs burning up our fuel rapidly.
I'm just being pedantic about the sun, lol
Well, yes, the obvious counter argument being that, you will never build more advanced reactors on scale (some are already available), or develop new fuel cycle if you stunt the evolution process and block the technology we already have.
Imagine saying to be favourable to installing solar panels but only when they will be 100% recyclable and with efficiency close to the theorical maximum
This would be relevant if any reactor had ever gotten its energy from primarily from fertile material. None have so it is not.
We would if ecologist weren't shutting down any research on this subject.
"It wouldn't have bankrupted every program that tried if you'd just let us fill every body of water with lethal levels of Pu240, Cs137 and Tc99" isn't a great counter argument.