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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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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.”
E. Alves, L.C. Alves, M.F da Silva, A.A. Melo, J.C. Soares, F. Scaffidi-Argentina
Fusion Science and Technology | Volume 38 | Number 3 | November 2000 | Pages 320-325
Technical Paper | Special Issue on Beryllium Technology for Fusion | doi.org/10.13182/FST00-A36145
Articles are hosted by Taylor and Francis Online.
The electrical resistivity behaviour of a beryllium pebble bed has been studied as a function of the temperature and pressure. At room temperature the resistivity of a single size 2 mm pebble bed decreases drastically from 2·10−2 Ωm to 10−4Ωm by applying an external pressure. After this first drop, the resistivity shows an almost linear decrease with the applied pressure. The same trend appears for a single size 0.1–0.2 mm pebble bed, but the resistivity values are about one order of magnitude higher than in the case of the 2 mm pebbles. At room temperature, the lowest resistivity values were found for the case of a binary pebble bed. After a mechanical cycling the electrical resistivity of the bed never reaches its initial value for zero pressure but it remains about one order of magnitude below the original value. After the first loading cycle the following loading/unloading resistivity curves do not show any significant change. The temperature dependence of the mixed pebble bed was investigated in air at 300 °C, 450 °C and 550 °C. The resistivity behaviour of the pebble bed with the applied pressure is, at high temperature, qualitatively the same as that observed at room temperature. For the same applied load the pebble bed electrical resistivity increases almost linearly with the temperature. Measurements of the oxyde content of the pebbles before and after the heating show a higher beryllium oxide content for the heated pebbles than for the not heated ones.