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Division Spotlight
Nuclear Nonproliferation Policy
The mission of the Nuclear Nonproliferation Policy Division (NNPD) is to promote the peaceful use of nuclear technology while simultaneously preventing the diversion and misuse of nuclear material and technology through appropriate safeguards and security, and promotion of nuclear nonproliferation policies. To achieve this mission, the objectives of the NNPD are to: Promote policy that discourages the proliferation of nuclear technology and material to inappropriate entities. Provide information to ANS members, the technical community at large, opinion leaders, and decision makers to improve their understanding of nuclear nonproliferation issues. Become a recognized technical resource on nuclear nonproliferation, safeguards, and security issues. Serve as the integration and coordination body for nuclear nonproliferation activities for the ANS. Work cooperatively with other ANS divisions to achieve these objective nonproliferation policies.
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.”
Ihor O. Bohachevsky
Fusion Science and Technology | Volume 2 | Number 1 | January 1982 | Pages 110-119
Technical Paper | ICF Chamber Engineering | doi.org/10.13182/FST82-A20741
Articles are hosted by Taylor and Francis Online.
Many inertial confinement fusion reactors will employ liquid lithium to breed tritium, to remove heat from reactor vessels, and to protect the interior walls of the vessel. Heat loads on the liquid lithium will consist of intense pulses that are short in comparison to hydrodynamic and thermal relaxation times and therefore will generate pressure pulses and/or pressure waves. The generation process is investigated analytically and numerically. Analytic solutions are derived for liquid blankets with thicknesses comparable to the neutron energy deposition depth contained between two structural shells and for free surface layers with thicknesses much smaller than the depth of neutron energy deposition. Results indicate that the amplitudes of the neutron-generated pressure waves are comparable to the mean pressure rise that would be obtained if the energy were deposited so slowly and uniformly that the waves did not develop. Numerically investigated are pressure pulses in lithium layers, which are initially at the vapor pressure. Results indicate that rapid heating occurs at constant specific volume (isochorically) and therefore results in a sharp and intense pressure rise. However, the resulting pressure wave dissipates after propagating only a few millimetres through the layer if the lithium contains any fraction of the vapor phase.