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The use of thorium for Nuclear Energy
Zoboomafoo: Heyi Chen, Michael DePiero, Luke Gillan
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Background on reactors
Nuclear reactors run on a rare isotope of uranium (235) It creates energy by making the uranium react and produce heat, which heats water to steam which is used to turn turbines to produce energy The pleasure that the water needs to be under is what is dangerous. Thorium is safer because it is not being pressurized It is also safer because the fail safes for a thorium reactor do not require electricity
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Overview - Relevantly: it produces more energy and less weapons and waste. - History : We have had this technology since the 1950s! - Research : Research needs to be conducted to make thorium reactors possible. - Closing: Why are we not building thorium now if its so good!
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Relevance The Zoboomafoo team chose this topic due to:
- how its makes no sense that we are not making these reactors. - Thorium is waiting to unleash its power to help power the world. Thorium produces 1000 times (at least!) less waste uranium!) Thorium's waste only takes 500 years to cool as apposed to uranium's 10,000. - The planet is relevant to all of us therefore we should all seriously consider thorium as a power source.
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weaponization Unlike Uranium, Thorium does not produce plutonium of which is needed for a nuclear weaponization. Thorium is not naturally fissile, so unlike Uranium it won't start splitting and exploding on it's own. Thorium reactions are triggered by bombarding it with neutrons, and it can be stopped by stopping the bombardment making Thorium much safer. Thorium also produces at least 1000 times less nuclear waster(sometimes as high as 10,000 times less) and it cools in within 500 years, which is 20x less then Uranium's waste. All this together, extremely reduces any risk of weaponization of Thorium.
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History Thorium has been considered to be a type of nuclear fuel as early as 1946 by the Oak Ridge National Laboratory in Tennessee. Thorium Tetrafluoride fuel was experimented with a molten salt reactor by the Oak Ridge National Laboratory in Tennessee in between
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History Tomorrow The newest experiments with Thorium fuel has been conducted using a small Advanced Fast Reactor. This inheritably safe 100MW AFR-100 reactor was developed under the US-DOE program that focuses on the idea of exchanging the uranium fuel in current nuclear reactors with Thorium based fuel
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Future Research The biggest challenges includes unproven compatibility with liquid cored reactor (most common type of reactors), and unproven fuel recycling program. Thus Thorium adaptation and disposal program needs further research. In order to utilities Thorium fuel, it is most likely for solid cored reactors to be constructed due to proved reliability.
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Closing Thorium has much less danger risks compared to Uranium
It is around 3 times more abundant then Uranium More Efficient At least 10x less nuclear waste compared to Uranium Cools within 500 years(compared to Uranium's 10,000) Despite most nuclear reactors being not able to handle Thorium, we recommend that they either be modified or built. All new Nuclear reactors surely should be built for Thorium.
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Source Heidet, F. et al. “Feasibility Study on AFR-100 Fuel Conversion from Uranium-Based Fuel to Thorium-Based Fuel.” 30 June 2012, SciTech Connect, doi: / Van Gosen, Bradley S et al. “Thorium Deposits of the United States— Energy Resources for the Future?” Thorium Deposits of the United States— Energy Resources for the Future?, 4 May 2009, Bjork, Klara Insulander. "Comparison of Thorium-based Fuels with Different Fissile Components in Existing Boiling Water Reactors." Science Direct. Elsevier, Aug Web. 28 Sept < state.edu/science/article/pii/S >. Anantharaman, K. "Utilization of Thorium in Reactors." ScienceDirect. Elsevier, 15 Dec Web. 28 Sept < Bagla, Pallava. "Thorium Seen as Nuclear's New Frontier." Science. AAAS, 13 Nov Web. 28 Sept Katusa, Marin. "The Thing About Thorium: Why The Better Nuclear Fuel May Not Get A Chance." Forbes. Forbes Magazine, 16 Feb Web. 01 Nov .
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