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Nuclear Installations Safety
Devoted specifically to the safety of nuclear installations and the health and safety of the public, this division seeks a better understanding of the role of safety in the design, construction and operation of nuclear installation facilities. The division also promotes engineering and scientific technology advancement associated with the safety of such facilities.
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Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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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.”
Glenn Gerdin, Donald Mueller, Bernard W. Wehring
Fusion Science and Technology | Volume 7 | Number 2 | March 1985 | Pages 180-196
Technical Paper | Experimental Device | doi.org/10.13182/FST85-A24533
Articles are hosted by Taylor and Francis Online.
A method is proposed to measure the properties of the alphas escaping a deuterium-tritium-fueled magnetically confined fusion reactor. This method is called the charge neutralization approach; it involves the slowing down of alphas in carbon foils of known thickness so that a significant percentage of the alphas are neutralized. These alphas can be detected by methods similar to those developed for charge-exchange neutral analysis. The foils would be placed in a recessed slot in the foil holder that would, in turn, be placed in the shadow of the limiter to reduce the heat and particle flux to the foils. Considerable energy selection can be achieved by varying the foil thickness; the lower limit on detectable alpha energy is ∼200 keV. The ratio of alpha signal to nuclear noise was estimated for a ZnS scintillator 15 μm thick being operated in the current mode in a borated limestone shield. Experimental values were used for the response to neutrons, and linear absorption coefficients were used for the response to gammas. The alpha wall flux was that calculated for a Tokamak Fusion Test Reactor (TFTR) with Q = 1, a plasma current of 2.5 MA, and a minor radius of 85 cm; the radiation fluxes were scaled from the one-dimensional calculations of L-P. Kufor TFTR at Q = 1. For this example, the signal to nuclear noise ratio becomes greater than unity at ∼75 cm into the shield indicating the amount of shielding material required.