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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 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. 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.”
D. Pacella, G. Pizzicaroli, D. Mazon, P. Malard
Fusion Science and Technology | Volume 57 | Number 2 | February 2010 | Pages 142-151
Technical Paper | doi.org/10.13182/FST10-A9368
Articles are hosted by Taylor and Francis Online.
In this paper we propose a soft-X-ray method to characterize dust accumulation or layer formation on a given substrate. The method determines the differential absorption based on the X-ray lines emitted from the substrate by fluorescence as a result of film or powders deposited on the substrate surface. We have chosen to use molybdenum as the material for the substrate because it is used in present-day tokamaks and it is being considered as material for the first mirror. It also offers the advantage of having two strong lines, well separated in energy: the L-shell emissions centered at [approximately]2.3 keV and the K lines at [approximately]17.4 keV. The transparency of the layer can be then measured at 2.3 keV, provided the K line is unaffected. The feasibility of the proposed method was clearly demonstrated in laboratory experiments, providing estimations of the thicknesses that can be detected, for a number of relevant elements for fusion devices (Be, C, Fe, and W).