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Division Spotlight
Radiation Protection & Shielding
The Radiation Protection and Shielding Division is developing and promoting radiation protection and shielding aspects of nuclear science and technology — including interaction of nuclear radiation with materials and biological systems, instruments and techniques for the measurement of nuclear radiation fields, and radiation shield design and evaluation.
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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Nuclear Science and Engineering
August 2024
Nuclear Technology
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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.”
Keisuke Sasaki, Tooru Shibutani, Takahiro Itou, Takahiro Tadokoro, Shuichi Hatakeyama (Hitachi)
Proceedings | Nuclear Plant Instrumentation, Control, and Human-Machine Interface Technolgies (NPIC&HMIT 2019) | Orlando, FL, February 9-14, 2019 | Pages 573-580
After the serious accident happened in March, 2011 at Fukushima Dai-ichi Nuclear Power Plant, various countermeasures are required and have been carried out. Regarding the radiation monitoring, the reinforced environmental resistance, additional monitoring equipment for the additional facilities and the diversity of monitoring principle with the existing monitoring devices are the scope of improvement. Hitachi, Ltd. and Hitachi-GE have been developing a fiber optic radiation monitor using a neodymium-doped yttrium aluminum garnet (Nd:YAG) crystal and Eu3+ doped gadolinium tantalate (GdTaO4:Eu) crystal. Prototype monitors have been developed and their performance evaluation was carried out. As a result of the evaluation, fiber optic radiation monitors show very good characteristics for a nuclear power plant use. Therefore, we advanced a study about system constitution applying these detectors. In particular, system constitution plan and characteristics are listed in this paper in the case of CAMS, ARMS and monitoring post. Finally, the future prospects of the optic fiber radiation monitor are mentioned.