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Young Members Group
The Young Members Group works to encourage and enable all young professional members to be actively involved in the efforts and endeavors of the Society at all levels (Professional Divisions, ANS Governance, Local Sections, etc.) as they transition from the role of a student to the role of a professional. It sponsors non-technical workshops and meetings that provide professional development and networking opportunities for young professionals, collaborates with other Divisions and Groups in developing technical and non-technical content for topical and national meetings, encourages its members to participate in the activities of the Groups and Divisions that are closely related to their professional interests as well as in their local sections, introduces young members to the rules and governance structure of the Society, and nominates young professionals for awards and leadership opportunities available to members.
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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.”
Toshihiko Yamanishi, Mikio Enoeda, Kenji Okuno, Robert H. Sherman
Fusion Science and Technology | Volume 29 | Number 2 | March 1996 | Pages 232-243
Technical Paper | Fusion Fuel Cycle | doi.org/10.13182/FST96-A30710
Articles are hosted by Taylor and Francis Online.
A control method was proposed for the cryogenic distillation column with a feedback stream. The top and bottom flow rates of the column are adjusted for the variation of external feed composition to control product purity. The flow rate of the side stream and the power of the reboiler heater are promptly and linearly changed with the corresponding variation of external feed flow rate. Ordinary columns with no feedback stream are first-order lag systems for the case where the top flow rate is chosen as a manipulated variable. On the other hand, the column with a feedback stream is a second-order lag system even in this case. The parameter-setting method of the proportional-integral (PI) controller was proposed to predict the unstable region in the control of the column. The method can also be applied to the case where the measurement of the controlled variable is accompanied by a long time lag. However, the longer time lag requires a larger integral time, and the larger integral time brings a larger overshoot and slower damping for the controlled variable. For this case, the promptness of the control can be improved by introducing the PI derivative controller.