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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.
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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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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.”
Masami Ohnishi
Fusion Science and Technology | Volume 2 | Number 4 | October 1982 | Pages 609-616
Technical Paper | Plasma Engineering | doi.org/10.13182/FST82-A20801
Articles are hosted by Taylor and Francis Online.
Since an ignited deuterium-tritium plasma of a moving ring compact torus reactor (MRCTR) is thermally unstable at the operating temperature, suppression of the thermal instability is an essential issue for maintaining the stationary burning of a plasma. The feedback stabilization by means of major radial compression-decompression is proposed for a burn control in an MRCTR. The compression-decompression is carried out through the regulation of the solenoidal magnetic field according to the deviation of the ion temperature from the equilibrium value. The dynamics of a plasma core with a feedback control is calculated in a zero-dimensional plasma model assuming the empirical confinement scalings obtained in the present tokamak experiments. The effects of ion density on the dynamics are also studied for two extreme cases of complete particle recycling and perfect pumping. The scheme is found to be effective for the burn control. The deviations of a major radius and a fusion output power are less than several percents of the equilibrium values during the control to suppress the temperature excursion. The rate of change in the magnetic field for the control is as slow as 500 G/s.
