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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
Vogtle-3 shuts down for valve issue
One of the new Vogtle units in Georgia was shut down unexpectedly on Monday last week for a valve issue that has since been investigated and repaired. According to multiple local news outlets, Georgia Power reported on July 17 that Unit 3 was back in service.
Southern Company spokesperson Jacob Hawkins confirmed that Vogtle-3 went off line at 9:25 p.m. local time on July 8 “due to lowering water levels in the steam generators caused by a valve issue on one of the three main feedwater pumps.”
Benjamin E. Harvey (Univ of Birmingham), Lindsay McMillan (Univ of Birmingham/Mott MacDonald), Alan W. Herbert (Univ of Birmingham)
Proceedings | 16th International High-Level Radioactive Waste Management Conference (IHLRWM 2017) | Charlotte, NC, April 9-13, 2017 | Pages 273-280
Colloids can potentially enhance the transport of radionuclides in groundwater, meaning radionuclides could travel further than would normally be predicted by solute-only transport modelling. To develop understanding, potential radionuclide transport processes are investigated. Colloid-Facilitated Radionuclide Transport is investigated as part of the Colloid Formation and Migration (CFM) experiment at the Grimsel Test Site in Switzerland, where in-situ migration experiments have investigated the transport of tracers, bentonite colloids and radionuclides at a variety of flow velocities in a shear zone within fractured granodiorite.
This paper presents a transport model that aims to replicate the transport of tracers, colloids and americium in two different experiments using consistent parameters. Inverse modelling has been used to describe the hydraulic properties of the shear zone. Flexible transport equations are then used to simulate contaminant transport. The model is able to replicate the breakthrough curves for colloids and americium across two experiments with different dipole flow fields using consistent parameters. The parameter values used to describe colloid attachment and americium desorption are within the ranges used by other models in the CFM programme, but are different to ones generated by laboratory desorption experiments. It is planned to extend the model to other radionuclides in the future.