Flow profile factors (PFs), which adjust measurand to real flow rates, also strongly depend on flow profiles. To determine profile factors for actual power plants, manufactures of flowmeters usually conduct factory calibration tests under ambient flow conditions. Indeed, flow measurements with high accuracy for reactor feedwater require them to conduct calibration tests under real conditions, such as liquid conditions and piping layouts. On the contrary, as nuclear power plants are highly aging, readings of flowmeters for reactor feedwater systems drift due to the changes of flow profiles. The causes of those deviations are affected by the change of wall roughness of inner surface of pipings. We have conducted experiments to quantify the effects of flow patterns on the PFs due to pipe roughness and asymmetric flow, and the results of our experiments have shown the effects of elbows and pipe inner roughness, which strongly affect to the creation of the flow patterns. Those changes of flow patterns lead to large errors in measurements with transit time (time-of-flight: TOF) ultrasonic flow meters. In those experiments, changes of pipe roughness result in the changes of PFs with certain errors. Therefore, we must take into account those effects in order to measure the flow rates of feedwater with better accuracy in actual power plants.
Skip Nav Destination
14th International Conference on Nuclear Engineering
July 17–20, 2006
Miami, Florida, USA
Conference Sponsors:
- Nuclear Engineering Division
ISBN:
0-7918-4243-6
PROCEEDINGS PAPER
Effects of Inner Surface Roughness and Asymmetric Pipe Flow on Accuracy of Profile Factor for Ultrasonic Flow Meter
Michitsugu Mori,
Michitsugu Mori
Tokyo Electric Power Company, Inc., Yokohama, Japan
Search for other works by this author on:
Kenichi Tezuka,
Kenichi Tezuka
Tokyo Electric Power Company, Inc., Yokohama, Japan
Search for other works by this author on:
Yasushi Takeda
Yasushi Takeda
Hokkaido University, Sapporo, Japan
Search for other works by this author on:
Michitsugu Mori
Tokyo Electric Power Company, Inc., Yokohama, Japan
Kenichi Tezuka
Tokyo Electric Power Company, Inc., Yokohama, Japan
Yasushi Takeda
Hokkaido University, Sapporo, Japan
Paper No:
ICONE14-89729, pp. 761-767; 7 pages
Published Online:
September 17, 2008
Citation
Mori, M, Tezuka, K, & Takeda, Y. "Effects of Inner Surface Roughness and Asymmetric Pipe Flow on Accuracy of Profile Factor for Ultrasonic Flow Meter." Proceedings of the 14th International Conference on Nuclear Engineering. Volume 2: Thermal Hydraulics. Miami, Florida, USA. July 17–20, 2006. pp. 761-767. ASME. https://doi.org/10.1115/ICONE14-89729
Download citation file:
9
Views
Related Proceedings Papers
Related Articles
Theoretical, Numerical, and Experimental Study of the Time of Flight Flowmeter
J. Fluids Eng (April,2011)
Extrapolation and Curve-Fitting of Calibration Data for Differential Pressure Flow Meters
J. Eng. Gas Turbines Power (February,2010)
A Universal, Nonintrusive Method for Correcting the Reading of a Flow Meter in Pipe Flow Disturbed by Installation Effects
J. Fluids Eng (September,2002)
Related Chapters
Modeling of SAMG Operator Actions in Level 2 PSA (PSAM-0164)
Proceedings of the Eighth International Conference on Probabilistic Safety Assessment & Management (PSAM)
Pulsation and Vibration Analysis of Compression and Pumping Systems
Pipeline Pumping and Compression System: A Practical Approach, Third Edition
Pulsation and Vibration Analysis of Compression and Pumping Systems
Pipeline Pumping and Compression Systems: A Practical Approach, Second Edition