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The Mission of the Robotics and Remote Systems Division is to promote the development and application of immersive simulation, robotics, and remote systems for hazardous environments for the purpose of reducing hazardous exposure to individuals, reducing environmental hazards and reducing the cost of performing work.
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2024 ANS Annual Conference
June 16–19, 2024
Las Vegas, NV|Mandalay Bay Resort and Casino
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ANS Standards Committee publishes joint ASME/ANS standard for Level 1/large early release frequency PRA
ANSI/ASME/ANS RA-S-1.1-2024, Standard for Level 1/Large Early Release Frequency Probabilistic Risk Assessment for Nuclear Power Plant Applications, has been published by the American Nuclear Society. The document, which is a joint standard developed with the American Society of Mechanical Engineers by the ANS/ASME Joint Committee on Nuclear Risk Management, received the approval of the American National Standards Institute on February 29, 2024, and was issued on March 15, 2024.
Zahra Papi, Farrokh Khoshahval
Nuclear Technology | Volume 209 | Number 7 | July 2023 | Pages 1050-1067
Technical Paper | doi.org/10.1080/00295450.2023.2167462
Articles are hosted by Taylor and Francis Online.
There is an obvious effort to increase the burnup of used fuel assemblies in the Bushehr WWER-1000 Nuclear Power Plant (BNPP) in order to improve fuel utilization. The outcomes of this research could result in an increase in the BNPP reactor cycle length, which would lead to improved fuel consumption. Considering the lack of uranium resources and the planning to use new types of fuel in the BNPP, the use of integrated burnable absorber (IBA) materials is of great importance. An analysis of the performance of various IBAs, including Gd2O3-UO2, Er2O3-UO2, and Dy2O3-UO2, as well as the standard (proposed by the designer) burnable absorber (BA) (CrB2Al) in the BNPP, and their impact on fuel neutronic characteristics has been performed. Five fuel assemblies: one without a BA fuel rod and four each containing standard BA gadolinia, erbia, and dysprosia fuel pins were investigated. The neutronic properties of BAs were evaluated by the infinite multiplication factor, reactivity swing, and power peaking factor dependence on fuel burnup. Gadolinia, with a concentration of 5%, has the greatest effect on initial reactivity with 10 893 pcm and the lowest effect on the reactivity swing with 0.277 Δk among the other BAs, which leads to selecting the most appropriate BA for improving reactor core stabilities and enhancing operational safety. The gadolinium IBA extends the cycle burnup by about 1 GWd/tonne U compared to the standard BA. At the beginning of the cycle, erbium has a more uniform power distribution than the standard BA; however, at the end of the cycle, gadolinia has a more uniform power distribution.