Loading...

Thorium Disadvantages

113,685 views

Loading...

Loading...

Transcript

The interactive transcript could not be loaded.

Loading...

Rating is available when the video has been rented.
This feature is not available right now. Please try again later.
Published on Aug 6, 2017

Uranium-233 is a fissile isotope of uranium that is bred from thorium-232 as part of the thorium fuel cycle. Uranium-233 was investigated for use in nuclear weapons. Uranium-233 is produced by the neutron irradiation of thorium-232. Thorium-232 absorbs a neutron, becomes thorium-233, then quickly decays into protactinium-233. Protactinium-233 has a half-life of 27 days and before decaying into uranium-233.

This protactinium has a large cross-section and can absorb neutrons needed to sustain fission. Because uranium-233 releases so few neutrons in thermal-spectrum, and because 2 neutrons are needed to sustain a chain reaction, existence of protactinium would stop fission.

Protactinium-233 is a challenge unique to thorium reactors.

Low breeding ratio is a challenge unique to breeder reactors fueled by thorium, which operate in thermal-spectrum.

The 5,000 tpy figure of Thorium assumes a 50,000 tpy Rare Earths facility that primarily utilizes monazite as its feed-stock.

Thorium is a companion element to Monazite. Monazite runs at +50% REE and about 7% Th. So if you processed 50,000 tons of monazite you would get about 3,500 tpy of Th. However, monazite would not be the only feed-stock. You would use many other mineralizations. like apatite running at 3% REE and .002% Th (but with lots of heavy REE). So it would be a mix and tend toward the 5,000 tpy range.

Loading...

Advertisement
When autoplay is enabled, a suggested video will automatically play next.

Up next


to add this to Watch Later

Add to

Loading playlists...