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The mission of the Decommissioning and Environmental Sciences (DES) Division is to promote the development and use of those skills and technologies associated with the use of nuclear energy and the optimal management and stewardship of the environment, sustainable development, decommissioning, remediation, reutilization, and long-term surveillance and maintenance of nuclear-related installations, and sites. The target audience for this effort is the membership of the Division, the Society, and the public at large.
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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.”
M. Z. Youssef, A. Kumar, M. Abdou, M. Nakagawa, K. Kosako, Y. Oyama, T. Nakamura
Fusion Science and Technology | Volume 19 | Number 3 | May 1991 | Pages 1891-1902
Neutronic | Proceedings of the Ninth Topical Meeting on the Technology of Fusion Energy (Oak Brook, Illinois, October 7-11, 1990) | doi.org/10.13182/FST91-A29619
Articles are hosted by Taylor and Francis Online.
Effort in Phase IIC of the US/JAERI Collaborative Program on Fusion Neutronics was focused on performing integral experiments and post analyses on blankets that include the actual hetergeneities found in several blanket designs. Two geometrical arrangements were considered, namely multilayers of Li2O and beryllium in an edge-on, horizontally alternating configuration for a front depth of 30 cm, followed by the Li2O breeding zone (Be edge-on, BEO, experiment), and vertical water coolant channels arrangement in which one is placed behind the first wall and two other channels (width of 0.5 cm each) are placed at depths of 10 and 30 cm from the first wall (WCC experiment). The objectives are to experimentally verify the enhancement in tritium production in the first experiment and to examine the accuracy of predicting tritium production and other reaction rates around these heterogeneities in the two experiments. In the BOE system, it was shown that, with the zonal method to measure tritium production from natural lithium (Tn), the calculated-to-measured values (C/E) are 0.95 − 1.05 (JAERI) and 0.98 − 0.9 (U.S.), which is consistent with the results obtained in other Phases of the Program. In the WCC experiment, there is a noticeable change in C/E values for T6 near the coolant channels where steep gradients in T6 production are observed. The C/E values obtained with the Li-foils to measure T6 are better than those obtained by the Li-glass method. As for T7, calculations and measurements by NE213 method are within ± 15% in JAERI's analysis, but larger values (∼ 20–25%) are obtained in the U.S. analysis. Around heterogeneities, the prediction accuracy for T7 is better than that for T6. In both experiments, the prediction accuracy for high-threshold reactions [(e.g. 93Nb(n,2n)] is within ± 10% as obtained by both Monte Carlo and Sn codes, however, it was shown that the 58Ni(n,2n) cross-section of ENDF/B-V should be increased by 25–30% at high incident neutron energies to give better C/E values.