Thorium Disadvantages
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.
Thorium Disadvantages listed in this video:
00:00 Solid-fuel thorium reactors fuel utilization ratios similar to PWR.
00:42 Liquid-Fuel in United States licensing is "scary".
02:04 Obama Administration willing to give away MSR know-how.
02:40 PWR seen as "good enough" for long time.
03:00 Licensing restrictions specifically target liquid-fuel.
04:45 NEA OECD evaluated solid-fuel, and liquid-fuel-fast-spectrum only.
20:50 Thermal-spectrum neutrons hitting U233 produce only ~2.3 neutrons.
23:00 Graphite moderator required to sustain fission in MSBR thermal-spectrum.
27:50 Protactinium-233 half-life 27 days.
29:00 Material challenges (MSR is pre-requisite so MSR challenges are Th challenges.)
Видео Thorium Disadvantages канала Thorium Remix
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.
Thorium Disadvantages listed in this video:
00:00 Solid-fuel thorium reactors fuel utilization ratios similar to PWR.
00:42 Liquid-Fuel in United States licensing is "scary".
02:04 Obama Administration willing to give away MSR know-how.
02:40 PWR seen as "good enough" for long time.
03:00 Licensing restrictions specifically target liquid-fuel.
04:45 NEA OECD evaluated solid-fuel, and liquid-fuel-fast-spectrum only.
20:50 Thermal-spectrum neutrons hitting U233 produce only ~2.3 neutrons.
23:00 Graphite moderator required to sustain fission in MSBR thermal-spectrum.
27:50 Protactinium-233 half-life 27 days.
29:00 Material challenges (MSR is pre-requisite so MSR challenges are Th challenges.)
Видео Thorium Disadvantages канала Thorium Remix
Показать
Комментарии отсутствуют
Информация о видео
Другие видео канала
Kirk Sorensen @ PROTOSPACE on Liquid Fluoride Thorium ReactorsReactors and Fuels & Nuclear ReactorsTHE THORIUM PROBLEM - Manufacturing & energy sector hobbled by thoriumThe Liquid Metal Battery: Innovation in stationary electricity storage"NASA" - THORIUM REMIX 2016THORIUM 232 - From History to Reactor [2019]Thorium: The Far Side of Nuclear - Fertile, Fissile, Solid Fuel, Liquid Fuel, High TemperatureThorium can give humanity clean, pollution free energy | Kirk Sorensen | TEDxColoradoSpringsNuclear 101: How Nuclear Bombs Work Part 1/2THORIUM DEBUNKIMSR: Terrestrial Energy's Integral Molten Salt Reactor -by Dr. David LeBlanc @ TEAC7Making Safe Nuclear Power from Thorium | Thomas Jam Pedersen | TEDxCopenhagenLFTR (Liquid Fluoride Thorium Reactor) Defended by Kirk Sorensen @ ThEC2018Thorium Debate / Molten Salt Reactor Forum @ ThEC2018The Molten-Salt Reactor ExperimentIs Thorium Our Energy Future? | Answers With JoeLiquid Fluoride Thorium Reactor - Thorium Nuclear Energy - Revolutionary Energy SourceThorium - A METAL THAT NO ONE NEEDS!Thorium and the Future of Nuclear EnergyLFTR Chemical Processing & Power Conversion - Kirk Sorensen