ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Division Spotlight
Robotics & Remote Systems
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.
Meeting Spotlight
2024 ANS Annual Conference
June 16–19, 2024
Las Vegas, NV|Mandalay Bay Resort and Casino
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!
Latest Magazine Issues
May 2024
Jan 2024
Latest Journal Issues
Nuclear Science and Engineering
June 2024
Nuclear Technology
Fusion Science and Technology
Latest News
Become a knowledge manager at UWC 2024
The American Nuclear Society is now accepting applications for knowledge managers to work during the 2024 Utility Working Conference and Vendor Technology Expo. This year’s UWC, “Nuclear Momentum: Advancing Our Clean Energy Future,” will be held August 4–7, 2024, at the JW Marriott Marco Island Beach Resort on Marco Island, Fla.=
Hyoung Tae Kim, Hee Cheon No
Nuclear Technology | Volume 136 | Number 2 | November 2001 | Pages 169-185
Technical Paper | Thermal Hydraulics | doi.org/10.13182/NT01-A3236
Articles are hosted by Taylor and Francis Online.
An integral response scaling method for reduced-height test facilities is described and validated for the local and the integral phenomena using the RELAP5 thermal-hydraulic code. In the present schematic scaling methodology, the scaling laws are generated from four scaling analyses: three-dimensional differential equation-based scaling analysis, one-dimensional differential equation-based scaling analysis, component-based scaling analysis, and overall integral scaling analysis. Through use of integral response function, scaling parameters related to four types of requirements are identified: time scaling, initial-condition scaling, transient scaling, and bifurcation-phenomena scaling requirements. In the present scaling method, flow velocities in the vertical channel and at break locations of the scaled-down model can be preserved setting up the scaling as R = lR. The significance of the velocity preservation in the reduced-height facility is demonstrated by the RELAP5 code.To validate the present scaling method, similarity criteria from the integral response scaling method are applied to the scaled-down model of the Korea Standard Nuclear Power Plant simulating core boil-off process during midloop operation. The scaled-down model is basically developed with the length and area scales of 1/5 and 1/100, respectively. The integral simulation and local calculations for pot-boiling, blowdown, heat transfer in the steam generator, and off-take are conducted for a loss of RHR during the midloop operation to show the preservation of the similarity criteria using RELAP5.It turns out that the scaled-down model based on the present scaling method maintains well the similarity of the nondimensional parameters for the local phenomena. Furthermore, the integral simulation indicates that there are no noteworthy differences in the general trends between the prototype and scaled models.