ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Division Spotlight
Aerospace Nuclear Science & Technology
Organized to promote the advancement of knowledge in the use of nuclear science and technologies in the aerospace application. Specialized nuclear-based technologies and applications are needed to advance the state-of-the-art in aerospace design, engineering and operations to explore planetary bodies in our solar system and beyond, plus enhance the safety of air travel, especially high speed air travel. Areas of interest will include but are not limited to the creation of nuclear-based power and propulsion systems, multifunctional materials to protect humans and electronic components from atmospheric, space, and nuclear power system radiation, human factor strategies for the safety and reliable operation of nuclear power and propulsion plants by non-specialized personnel and more.
Meeting Spotlight
Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
Standards Program
The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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Latest News
Oklo completes end-to-end demonstration of advanced fuel recycling
Oklo Inc. has announced that it has completed the first end-to-end demonstration of its advanced fuel recycling process as part of an ongoing $5 million project in collaboration with Argonne and Idaho National Laboratories. Oklo’s goal: scaling up its fuel recycling capabilities to deploy a commercial-scale recycling facility that would increase advanced reactor fuel supplies and enhance fuel cost effectiveness for its planned sodium fast reactors.
John J. Nitao, Thomas A. Buscheck, Dwayne A. Chesnut
Nuclear Technology | Volume 104 | Number 3 | December 1993 | Pages 385-402
Technical Paper | Special Issue on Waste Management / Radioactive Waste Management | doi.org/10.13182/NT93-A34899
Articles are hosted by Taylor and Francis Online.
Some of the possible water transport mechanisms through fractured rock in the unsaturated zone at Yucca Mountain are studied to analyze the performance of a high-level nuclear repository at the potential Yucca Mountain site. Analysis shows that water can flow in fractures as opposed to flow through the rock matrix if the incoming flux and the fracture aperture size exceed critical values. The rock matrix does not have to be nearly saturated for fracture flow to occur because the fractures and matrix can be in capillary disequilibrium during transient episodic infiltration events. As an example, the type of flow, fracture or matrix, is calculated for vertical fractures in the hydrogeologic units at Yucca Mountain. The results affect such issues as natural and total system performance, site characterization activities, and site suitability determination. Also, the important differences between an unsaturated and a saturated site are pointed out. The traditional concepts of near-field, far-field, and disturbed zone become blurred when talking about the unsaturated zone. The heat of decay may have beneficial aspects for an unsaturated site. Current regulations containing such concepts such as “groundwater travel time” are not consistent with some of the physical processes inherent in an unsaturated system.