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Division Spotlight
Thermal Hydraulics
The division provides a forum for focused technical dialogue on thermal hydraulic technology in the nuclear industry. Specifically, this will include heat transfer and fluid mechanics involved in the utilization of nuclear energy. It is intended to attract the highest quality of theoretical and experimental work to ANS, including research on basic phenomena and application to nuclear system design.
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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Fusion Science and Technology
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.”
C. Petitjean, F. Atchison, G. Heidenreich, H. K. Walter, F. Amelotti, R. Andreani, F. de Marco, S. Monti, M. Pillon, M. Vecchi, V. E. Markushin, L. I. Ponomarev, C. Niebuhr
Fusion Science and Technology | Volume 25 | Number 4 | July 1994 | Pages 437-450
Technical Paper | Fusion Reactor | doi.org/10.13182/FST94-A30251
Articles are hosted by Taylor and Francis Online.
A design study is presented for an intense 14-MeV neutron source based on muon-catalyzed fusion to be used for first-wall and blanket material research for future fusion reactors. Negative pions are produced inside a 5- to 10-T magnetic field by an intense deuteron beam interacting with a 30- to 50-cm-long carbon target. The pions and the muons resulting from the decay of pions inflight are collected in the backward direction and stopped in a high-density deuterium-tritium (D-T) target. With an 18-MWdeuteron beam at 1.5 GeV (12 mA = 7.5 × 1016 d/s), ∼ 1016 π−/s can be generated, which will decay to muons of which up to 1015 μ−/s stop in the D-T mixture. Assuming Xc = 100 fusions per muon, muon-catalyzed fusion produces 14-MeV neutrons with a source strength of up to 1017 n/s, i.e., a neutron power of 200 kW. A neutron flux of up to 1014/cm2·s (10 dpa/yr) can be achieved in test volumes of several litres. These numbers, however, do not represent a technological limit. This source has about the same power efficiency for neutron generation as low-energy beams (d-Li stripping). It also has the advantage of producing the original 14-MeV fusion spectrum without tails, isotropically into a 4π solid angle. In addition, the power density and heat load of the primary target are a considerably smaller problem. The environment of the secondary target, the neutron source itself, can be made to resemble part of the tokamak ring to be simulated. The noninteracting part of the beam (30 to 40%) can be disposed of separately or reused for another facility (e.g., a spallation neutron source).