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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.”
T. F. Nichols, L. W. Townsend, J. W. Hines
Nuclear Technology | Volume 168 | Number 1 | October 2009 | Pages 178-181
Dose/Dose Rate | Special Issue on the 11th International Conference on Radiation Shielding and the 15th Topical Meeting of the Radiation Protection and Shielding Division (Part 1) / Radiation Protection | doi.org/10.13182/NT09-A9122
Articles are hosted by Taylor and Francis Online.
The dose from solar particle events (SPEs) poses a serious threat to the health of astronauts. A method for forecasting the rate and total severity of such events would give time for the astronauts to take actions to mitigate the effects from an SPE. The danger posed from an SPE depends both on the total dose received and the temporal profile of the event. The temporal profile describes how quickly the dose will arrive. Previously developed methods used neural networks to predict the total dose from an event. Later, the ability to predict the temporal profiles was added to the neural network approach. Localized weighted regression (LWR) was then used to determine if better fits with less computer load could be accomplished. Previously, LWR was shown to be able to predict the total dose from an event. LWR is the model being used to forecast the dose and the temporal profile from an SPE. LWR is a nonparametric memory-based technique; it compares a new query to stored sets of exemplar data to make its predictions. It is able to forecast early in an SPE the dose and dose rate for the event. For many events the total dose is predicted within a factor of 2 within 20 min of the beginning of the event. SPEs that are within the training parameters have temporal predictions within a few hours of the start of the event. Using an LWR model, forecasts of the dose and dose rate can be made a few hours after the start of the event. The model is able to forecast most types of events within [approximately]10% accuracy. However, there are a few events that the model fails to forecast accurately.