Their major asset for developing nuclear weapons is the Natanz uranium enrichment facility.

It doesn't have anything to do, in specifics, with centrifuges, with uranium enrichment.

Yellowcake uranium, Mark.

It's less than one percent of uranium, it's about 0.7 percent uranium.

Hardly at all. That's why it is still around. Uranium, two isotopes uranium 235, uranium 238 both of course are radioactive.

Uranium hexafluoride is a gas.

Uranium tetrafluoride is in solution.

He is not protecting himself from the uranium, he's protecting the uranium from himself.

And then we get to uranium.

They took natural uranium, and they separated those two isotopes, highly enriched it in uranium 235.

It's going to stay in solution. But the uranium will come out as uranium hexafluoride, a gas.

And uranium 233 is being consumed but the neutrons from the fission are making new uranium 233.

It became uranium 233. Isn't that cool?

These lovely ladies are uranium fuel rods.

Well I just discovered from the Department of Energy's data that the enrichment of uranium produces 93 per year of the CFC gas in this country, which is currently banned under the Montreal protocol.

Enrichment Elementary School's Japanese Magnet Program, students follow the Oregon State Curriculum.

Large uranium reserves for nuclear fission still exist.

Uranium is used in the production of nuclear power.

Here's the decay chain that uranium 232 is on.

like uranium, plutonium, and everything else when they decay.

So, uranium, which is very big, wants to split.

You wouldn't happen to have any uranium on you?

And this was really hard. It took big factories, very difficult to do isotopic enrichment.

You're fissioning uranium 233, but you're making a new one.

This is a handful of these uranium oxide fuel pellets.

You hit the salt with fluorine gas, and what'll happen is... There's uranium tetrafluoride, four fluoride ions, and there's uranium hexafluoride, six fluoride ions.

GLaDOS The Enrichment Center would like to announce a new employee initiative of forced voluntary participation.

Other students might be interested in a particular enrichment topic that they want to pursue individually.

Now What about thorium and uranium? Both are naturally occurring materials.

The uranium and plutonium took on a gas form to escape.

It basically boils down to the Bushehr nuclear power plant and to the Natanz fuel enrichment plant.

Uranium 233, if you hit it with a neutron it will fission.

And with current reactor technology we really don't have very much uranium.

And you have the uranium mining that you have to deal with.

So they started looking at it, and it turns out, no, it's a really bad idea, because as you made the uranium 233, you were always making uranium 232.

In the enrichment strategies, of course Jen, it's going to play an important part with that. gt gt Connie

Because I think it'll fission. I think it'll fission just like uranium 235.

The radioactivities are mixture of Uranium and Plutonium used in Hiroshima and Nagasaki.

We could use thorium about 200 times more efficiently than we're using uranium now.

They say to me, We're going to run out of uranium. I said, OK.

You've got this core fluid, a lithium beryilium salt, with uranium tetrafluoride in there.

So now, you've just refueled your core salt with uranium tetrafluoride. Cool trick, huh?

India and Pakistan developed nuclear weapons secretly by enriching uranium in nuclear energy facilities.

Well, uranium dioxide's a ceramic, and ceramic doesn't like releasing what's inside of it.

They'd take uranium 235 from less than one percent up to like 90 plus percent.