--- title: On the Use of Thorium in Light Water Reactors description: Exploring the potential of thorium in light water reactors for enhanced safety and reduced plutonium production, highlighting the need for updated research and development. --- [![CAnes logo\[96\]](https://canes.mit.edu/hs-fs/hubfs/CAnes%20logo%5B96%5D.png?width=300&height=91&name=CAnes%20logo%5B96%5D.png "CAnes logo[96]")](https://canes.mit.edu/) [![canes](https://canes.mit.edu/hs-fs/hubfs/canes.png?width=300&height=91&name=canes.png "canes")](https://canes.mit.edu/) [![](https://canes.mit.edu/hs-fs/hubfs/canes.png?width=500&height=152&name=canes.png)](https://canes.mit.edu/) This is a search field with an auto-suggest feature attached. - There are no suggestions because the search field is empty. - [the center](https://canes.mit.edu/center) - [science + engineering](https://canes.mit.edu/science-engineering) - [E+ Lab](https://canes.mit.edu/epluslab) - [publications](https://canes.mit.edu/reports) - [events](https://canes.mit.edu/events) This is a search field with an auto-suggest feature attached. - There are no suggestions because the search field is empty. # On the Use of Thorium in Light Water Reactors by [MIT CANES](https://canes.mit.edu/media/author/mit-canes) | Sep 20, 2024 [Request Copy](https://canes.mit.edu/report-request) Report Date: April 1999 Appendices: No Abstract The advantages and disadvantages of the use of thorium bearing fuel in light water reactors have been examined several times from the beginning of the nuclear energy era until the late seventies. The recent motivation for re-examining the use of thorium in light water reactors' once-through fuel cycle is enhancing the cycle proliferation-resistance due to reduced plutonium production. Additionally, economic benefits from reducing the initial enrichment needs of high burnup fuels may be obtained. Similarly, it may be possible to rely on the higher melting point and higher thermal conductivity of ThO2 to enhance the safety margin of the core. Thorium dioxide is the highest stable oxide form of thorium, which may further improve the spent fuel repository performance. The information obtained in previous studies is reviewed to assess its suitability for application to the current fuel cycle conditions. It is concluded that the thorium fuel experience of the past is insufficient to make a judgement on the feasibility and performance of the thorium bearing fuels in the reactors operating under current conditions. The needs for new research and development efforts in the areas of neutronics, fuel behavior, safety and waste performance are outlined.   Program:  NFC Nuclear Fuel Cycle Program Type:     TR  RPT. No.: 16 [BACK TO THE CENTER->](https://canes.mit.edu/center) Topics:   [NFC Nuclear Fuel Cycle Program](https://canes.mit.edu/media/tag/nfc-nuclear-fuel-cycle-program) Recent posts [Nuclear Energy Dominance: Can the US do it Alone?](https://canes.mit.edu/media/energy-dominance-can-the-us-do-it-alone) [Assessment of the Lifecycle Cost of Nuclear Grade Coolants for Advanced Reactors](https://canes.mit.edu/media/assessment-of-the-lifecycle-cost-of-nuclear-grade-coolants) [Bilge Yildiz and Jacopo Buongiorno Take Nuclear-Fueled AI to TEDx](https://canes.mit.edu/media/bilge-yildiz-and-jacopo-buongiorno-take-nuclear-fueled-ai-to-tedx) [Levelized Cost of Fuel (LCOF) Studies for Microreactors Using TRISO Fuel in Hydride and Beryllium-based composite Moderators in Open and Closed Fuel Cycles](https://canes.mit.edu/media/a-preliminary-study-on-the-feasibility-of-nuclear-batteries-for-offshore-power-generation-0) [A Preliminary Study on the Feasibility of Nuclear Batteries for Offshore Power Generation](https://canes.mit.edu/media/a-preliminary-study-on-the-feasibility-of-nuclear-batteries-for-offshore-power-generation) [![CAnes logo\[96\]](https://canes.mit.edu/hs-fs/hubfs/CAnes%20logo%5B96%5D.png?width=3300&height=1000&name=CAnes%20logo%5B96%5D.png "CAnes logo[96]")](https://canes.mit.edu/) 77 Massachusetts Avenue, 24-215 Cambridge, MA 02139 [canes@mit.edu](mailto:canes@mit.edu) - [ACCESSIBILITY](https://accessibility.mit.edu/) - [MEDIA](https://canes.mit.edu/center-media) - [CENTER](https://canes.mit.edu/center) - [EVENTS](https://canes.mit.edu/events) - [MAP](http://whereis.mit.edu/?go=24) - [MIT CCSE](https://cse.mit.edu/) - [MIT ENERGY INITIATIVE](https://energy.mit.edu/) - [MIT MECHE](http://meche.mit.edu/) - [MIT NRL](http://nrl.mit.edu/) - [MIT NSE](http://web.mit.edu/nse/) - [MIT PSFC](https://www.psfc.mit.edu/) © 2024 Massachusetts Institute of Technology   |  Privacy Policy