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Reactor Physics
The division's objectives are to promote the advancement of knowledge and understanding of the fundamental physical phenomena characterizing nuclear reactors and other nuclear systems. The division encourages research and disseminates information through meetings and publications. Areas of technical interest include nuclear data, particle interactions and transport, reactor and nuclear systems analysis, methods, design, validation and operating experience and standards. The Wigner Award heads the awards program.
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2024 ANS Annual Conference
June 16–19, 2024
Las Vegas, NV|Mandalay Bay Resort and Casino
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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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Latest News
Framatome signs contracts with Sizewell C
French nuclear developer Framatome is slated to deliver key equipment for Sizewell C Ltd.’s two large reactors planned for the United Kingdom’s Suffolk coast.
The agreement, reportedly worth multiple billions of euros, was announced this week and will involve Framatome from the design phase until commissioning. The company also agreed to a long-term fuel supply deal. Framatome is 80.5 percent owned by France’s EDF and 19.5 percent owned by Mitsubishi Heavy Industries.
Tsung-Kuang Yeh, Mei-Ya Wang
Nuclear Science and Engineering | Volume 160 | Number 1 | September 2008 | Pages 98-107
Technical Paper | doi.org/10.13182/NSE07-38
Articles are hosted by Taylor and Francis Online.
In order to increase the power generation efficiency of nuclear reactors, the utilities of light water reactors have opted for power uprates in the past decades. Upon a power uprate, the power density and coolant flow rate of a nuclear reactor would change immediately, followed by water chemistry variations due to enhanced radiolysis of water and shortened coolant residence times. If the boiling water reactor (BWR) has adopted hydrogen water chemistry (HWC) for corrosion mitigation, the optimal hydrogen injection rate may thus require a proper adjustment. Because of limited measurable water chemistry data, a well-developed computer code DEMACE was used in the current study to investigate the impact of various power levels (ranging from 100 to 120%) on the redox species concentrations and electrochemical corrosion potential (ECP) behavior of components in the primary coolant circuit of a domestic BWR operating under either normal water chemistry or HWC. Our analyses indicated that the chemical species concentrations and the ECP did not vary monotonically with increases in reactor power level at a fixed feedwater hydrogen concentration. In particular, the upper plenum and the upper downcomer regions exhibited uniquely higher ECPs at 104 and 114% power levels than those at the other evaluated power levels. Accordingly, the impact of power uprate on the HWC effectiveness in a BWR is expected to vary from location to location and eventually from plant to plant because of different degrees of radiolysis and physical dimensions.