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Division Spotlight
Fusion Energy
This division promotes the development and timely introduction of fusion energy as a sustainable energy source with favorable economic, environmental, and safety attributes. The division cooperates with other organizations on common issues of multidisciplinary fusion science and technology, conducts professional meetings, and disseminates technical information in support of these goals. Members focus on the assessment and resolution of critical developmental issues for practical fusion energy applications.
Meeting Spotlight
2024 ANS Winter Conference and Expo
November 17–21, 2024
Orlando, FL|Renaissance Orlando at SeaWorld
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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September 2024
Nuclear Technology
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August 2024
Latest News
Nuclear new build procurement considerations
It may seem counterintuitive, but the best time to enhance the ability to support operations and maintenance for a new plant is before construction starts. This is one of many lessons learned by the currently operating nuclear fleet. As construction and startup of many nuclear facilities was completed, it quickly became evident that the ability to efficiently support operations and maintenance was limited. Most of the information necessary to establish and manage procurement of spare and replacement items, maintenance, and configuration of the facilities was unavailable and had to be gathered on a case-by-case, “on-demand” basis. Absence of necessary information and the associated challenges resulted in the need for staff augmentation and multiyear-long projects to develop equipment bills of material and maintenance programs and to perform technical evaluations for the huge quantities of spare and replacement items being requested.
G. A. Porter, M. Delgado, Y. A. Hassan
Nuclear Technology | Volume 206 | Number 4 | April 2020 | Pages 565-576
Technical Paper | doi.org/10.1080/00295450.2019.1666600
Articles are hosted by Taylor and Francis Online.
Helical coil steam generators (HCSGs) are tube and shell heat exchangers under investigation due to their future in nuclear power applications. A model of an HCSG with a transverse pitch ratio of 2.98 and changing lateral pitch ratio was created to study the pressure on the surface of the tubes under low Reynolds number flow. Pressure-sensitive paint was applied to rods of an outer bundle of the test section, and instantaneous and average pressure fields were analyzed for Reynolds numbers 4000 and 6000. A comparative study showed that the pressures along the rods had nonlinear behavior. Previous studies suggested a relationship between tube bundle characteristics and the lateral pitch ratio in heat exchanger designs. Since the transverse pitch ratio is constant, the lateral pitch ratio defines the tube bundle cross section as either staggered or inline depending on the cross-section location. Averaged pressure distributions were compared to lateral pitch ratios at respective locations. The pressure distributions along the staggered cross-section portion of the test section were found to exhibit a linear behavior across the heat exchanger body. While this study focuses on average surface pressure measurements, the differences between the same lateral pitch ratio and surface pressure show disagreement with previous studies focused on constant cross-section tube bundles. Flow phenomena within tube bundles, such as vortex shedding, are suspected to be the cause of this discrepancy but a transient analysis is necessary to determine its source.