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The objectives of MSTD are: promote the advancement of materials science in Nuclear Science Technology; support the multidisciplines which constitute it; encourage research by providing a forum for the presentation, exchange, and documentation of relevant information; promote the interaction and communication among its members; and recognize and reward its members for significant contributions to the field of materials science in nuclear technology.
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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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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.”
Kiriko Miyamoto, Yoshikazu Inoue, Tetsuo Iwakura, Hiroshi Takeda, Shoichi Fuma, Kei Yanagisawa, Nobuyoshi Isliii
Fusion Science and Technology | Volume 41 | Number 3 | May 2002 | Pages 483-487
Environment | Proceedings of the Sixth International Conference on Tritium Science and Technology Tsukuba, Japan November 12-16, 2001 | doi.org/10.13182/FST02-A22636
Articles are hosted by Taylor and Francis Online.
A prototype of a tritium transfer model in the environment was developed for the purpose of dose estimation in our institute in 1995. The model consists of many compartments representing tritium reservoirs in a hydrological cycle in the local hydrosphere, and reservoirs in food chains in the aquatic and terrestrial environments. Underground tritium reservoirs are defined as three aquifers in the model, although the number of aquifers might depend on the site. Our present work was focused on an application of the model to an area with nuclear facilities, Tokai-mura, Japan, where there is only one aquifer. The Shinkawa (Shin River) flows through the Muramatsu area between two nuclear facilities, and then into the Pacific Ocean. About 2000 people live in the area and some use groundwater as a convenient daily water source as well as village tap water. Samples at 16 rainwater and 20 groundwater sites from the Muramatsu area (5 km2) as well as 3 groundwater sites from an inland area were taken during 1983–90, and tritium concentrations were measured. In order to investigate the scale of the drainage system of the Shinkawa basin, time series data of excess tritium in rainwater and groundwater were applied to our transfer model. As a result, the volume of the aquifer was calculated as half of the annual rainfall in the area. This is so small that the tritium concentration of the groundwater has a quick time trend response to input of tritium from rainwater. The results can be used to estimate population dose of the residents in the Muramatsu area.