by Environmental Protection Agency, Office of Radiation Programs, Las Vegas Facility in Las Vegas, Nev .
Written in English
|Statement||T. H. Pigford, C. S. Yang, Dept. of Nuclear Engineering, University of California.|
|Series||EPA ; 520/6-78-008, EPA (Series) -- 520/6-78-008.|
|Contributions||Yang, C. S., United States. Environmental Protection Agency. Office of Radiation Programs. Las Vegas Facility., University of California. Dept. of Nuclear Engineering.|
|The Physical Object|
|Pagination||ca. 150 p. in various pagings :|
|Number of Pages||150|
The report first establishes, as a basis for comparison, the principal fuel-cycle quantities for uranium fueling in light-water reactors. Possible flowsheets for adapting these light-water reactors to thorium fueling are then described and resource requirements and radioactive waste properties are compared. The thorium fuel cycle (shown above) starts with the transmutation of Th into U through a series of decays. U goes on to play the role of nuclear fuel in these reactors. The thorium fuel cycle also produces plutonium, but . Thorium fuel cycles Options for a thermal reactor are: •Once-through fuel cycle with Th as alternative fertile material to U with U or Pu driverFile Size: KB. Thorium fission-hybrid fuel cycle. The thorium fusion fission hybrid is discussed as a sustainable longer term larger resource base to the fast breeder fission reactor concept. In addition, it offers a manageable waste disposal process, burning of the produced actinides and serious nonproliferation : Magdi Ragheb.
The thorium fuel cycle is the path that thorium transmutes through from fertile source fuel to uranium fuel ready for fission. Th absorbs a neutron, transmuting it into Th Th beta decays to Pa and finally undergoes a second beta minus decay to become U This is the one way of turning natural and abundant Th into something fissionable. However, development of thorium fuel cycles has restarted again; mainly, perhaps, in India where thorium recycling is again considered as a serious alternative to the traditional uranium cycle. There is also a renewed interest in using thorium-based fuels in molten salt reactors with either fast or thermal spectra and on-line reprocessing Cited by: 1. Another incentive to use thorium in once-through fuel cycle is the possibility of incineration of weapons-grade plutonium (WPu) in combination with thorium in light-water reactors of WWER type to burn and not breed Pu. For this, mixed thorium plutonium oxide, containing ~5% PuO2, could be used as driver Size: 1MB. The Thorium Energy Conference (ThEC13) gathered some of the world’s leading experts on thorium technologies to review the possibility of destroying nuclear waste in the short term, and replacing the uranium fuel cycle in nuclear systems with the thorium fuel cycle in the long term.
Moreover, the lower atomic waste products decay to negligible radioactive levels after a few hundred years. Thorium fuel wastes are thus suitable for sub-surface storage facilities. 6. Proliferation resistance. Uranium as transmuted in the thorium fuel cycle is typically contaminated with uranium and is not easily separated from by: The thorium fuel cycle is a nuclear fuel cycle that uses an isotope of thorium, Th, as the fertile material. In the reactor, Th is transmuted into the fissile artificial uranium isotope U which is the nuclear fuel. Unlike natural uranium, natural thorium contains only trace amounts of fissile material, which are insufficient to initiate a nuclear chain reaction. Additional fissile . fresh look at the thorium cycle is ongoing. Whereas the UTh fuel cycle is undergoing a revival as a replacement of the existing Light Water Reactors (LWRs) system, a highly promising approach is its use in fusion-fission hybrid reactors as an eventual bridge and technology development for future pure fusion reactors. thorium fuels in once-through nuclear fuel cycles, but in some projects closed thorium-uranium or thorium-plutonium fuel cycles are also considered. Thorium fuel utilization, technical status and development needs were considered in detail by the INFCE Working Group 8 (). Some aspects of the thorium fuel cycle were considered at the.