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Meeting Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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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August 2025
Nuclear Technology
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July 2025
Latest News
The U.S. Million Person Study of Low-Dose-Rate Health Effects
There is a critical knowledge gap regarding the health consequences of exposure to radiation received gradually over time. While there is a plethora of studies on the risks of adverse outcomes from both acute and high-dose exposures, including the landmark study of atomic bomb survivors, these are not characteristic of the chronic exposure to low-dose radiation encountered in occupational and public settings. In addition, smaller cohorts have limited numbers leading to reduced statistical power.
Lei Wu, Jianjun Wang, Zhongning Sun
Nuclear Technology | Volume 211 | Number 6 | June 2025 | Pages 1202-1217
Research Article | doi.org/10.1080/00295450.2024.2385217
Articles are hosted by Taylor and Francis Online.
Submerged steam jet condensation is widely applied in many industrial fields due to its high heat and mass transfer efficiency during the process of direct contact condensation (DCC). The injection of steam into a water pool usually passes through an array of nozzles. It is important to understand the interaction between neighboring jets from different nozzles.
In this paper, two thermal resistance models for DCC are implemented into the computational fluid dynamics code ANSYS Fluent through a user-defined function. The triple steam nozzle cases, in which the inlet pressure ranges from 0.1 to 0.6 MPa, were investigated to understand the interaction of nozzles and their configuration as well as their mechanisms. The distributions of temperature, velocity, volumetric fraction, and pressure fields were analyzed for different cases. Furthermore, the plumes of steam jets always attract each other toward the center of the plumes, and when the inlet pressure is over 0.3 MPa, the mixing of neighboring steam plumes will occur.
In addition, the location where the peak value occurs for the parameters of steam velocity, pressure, and temperature, etc. is getting closer and closer to the center of the flow domain. In addition, the curve of the pressure along the centerline of the nozzle verified the existence of compression and expansion of steam inside the plume.