The Experts below are selected from a list of 3927 Experts worldwide ranked by ideXlab platform

Keneth Thomas Vector Grattan - One of the best experts on this subject based on the ideXlab platform.

  • Novel Negative Pressure Wave-Based Pipeline Leak Detection System Using Fiber Bragg Grating-Based Pressure Sensors
    Journal of Lightwave Technology, 2017
    Co-Authors: Jiqiang Wang, Tongyu Liu, Zhen Li, Tong Sun, Lin Zhao, Keneth Thomas Vector Grattan
    Abstract:

    In this paper, the design and underpinning technical principles of the novel design of a negative pressure wave (NPW)-based pipeline Leak Detection System has been reported, which is configured using fiber Bragg grating (FBG) pressure sensors. To evaluate this, a pipeline Leakage test platform has been established and experiments have been conducted, to verify the performance of a System using this FBG-based approach. The results show that a System using FBG-based sensors can accurately determine the pressure change trends along the pipeline and thus allow the calculation of the NPW velocity online. A key comparison is made with traditional NPW Detection techniques, showing that the novel Detection System is capable of achieving the higher Leak-location accuracy and the Detection of smaller Leakage volumes. This arises from the ability of the FBG-based System to allow an increased number of sensors to be multiplexed along the pipeline. Their corresponding output signals generated show a very satisfactory, high signal-to-noise ratio. The System has been evaluated, especially in its response to extraneous signals and thus disturbances caused by the pump starting or stopping can be eliminated. This was achieved through an analysis of the time sequence of the pressure changes captured by the multisensor array being carried out and thus immunity to such effects demonstrated. The System has thus been designed to minimize the instances where a false alarm occurs.

Yoshitaka Chikazawa - One of the best experts on this subject based on the ideXlab platform.

  • Water experiment on phased array acoustic Leak Detection System for sodium-heated steam generator
    Nuclear Engineering and Design, 2015
    Co-Authors: Yoshitaka Chikazawa, Takahiro Yoshiuji
    Abstract:

    Abstract A phased array acoustic Leak Detection System for sodium heated steam generator has been proposed. The major advantage of the new System is it could provide information of acoustic source direction. An acoustic source of a sodium–water reaction is supposed to be localized while the background noise of the steam generator operation is uniformly distributed in the steam generator tube region. Therefore the new System could separate the target Leak source from steam generator background noise. In the previous study, the methodology was proposed and basic performance was confirmed by numerical analysis. However, in the numerical analysis, acoustic transportation through the SG tube bundle was not modeled. In the present study, performance the proposed System has been confirmed in water experiments with mockup tube bundles.

  • Acoustic Leak Detection System for Sodium-Cooled Reactor Steam Generators Using Delay-and-Sum Beamformer
    Journal of Nuclear Science and Technology, 2010
    Co-Authors: Yoshitaka Chikazawa
    Abstract:

    A new acoustic Leak Detection System for sodium-cooled reactor steam generators using a delay-andsum beamformer is proposed. The major advantage of the delay-and-sum beamformer is that it could provide information on the acoustic source direction. An acoustic source of a sodium-water reaction is supposed to be localized, while the background noise of the steam generator operation is uniformly distributed in the steam generator tube region. Therefore, the delay-and-sum beamformer could distinguish the acoustic source of the sodium-water reaction from the steam generator background noise. In this paper, results of numerical analyses are provided to show the fundamental feasibility of the new method.

Andrew Welsh - One of the best experts on this subject based on the ideXlab platform.

  • Leak Detection for BTC
    World pipelines, 2007
    Co-Authors: Joanna Mabe, Keefe Murphy, Andrew Welsh, Gareth Williams
    Abstract:

    Joanna Mabe, Keefe Murphy, ATMOS International Limited, and Andrew Welsh and Gareth Williams, BTC Compagny, examine the commissioning of a real-time Leak Detection System on the BTC crude oil pipeline during start up.

  • Commissioning a Real-Time Leak Detection System on a Large Scale Crude Oil Pipeline During Start Up
    Volume 3: Materials and Joining; Pipeline Automation and Measurement; Risk and Reliability Parts A and B, 2006
    Co-Authors: Joanna Mabe, Keefe Murphy, Gareth Williams, Andrew Welsh
    Abstract:

    This paper describes the process of incremental pipeline filling and the phased commissioning of a real-time Leak Detection System for the 1768 km long BTC crude oil pipeline. Due to stringent environmental requirements, it is essential for the Leak Detection System to work from the moment that crude oil is introduced into the pipeline. Without any prior operational data and with the pipeline partially filled, it is challenging for the Leak Detection System to monitor the integrity of the pipeline throughout the whole filling process. The application of the pig tracking software to track the oil front as the crude displaces nitrogen is also discussed.Copyright © 2006 by ASME

Jiqiang Wang - One of the best experts on this subject based on the ideXlab platform.

  • Novel Negative Pressure Wave-Based Pipeline Leak Detection System Using Fiber Bragg Grating-Based Pressure Sensors
    Journal of Lightwave Technology, 2017
    Co-Authors: Jiqiang Wang, Tongyu Liu, Zhen Li, Tong Sun, Lin Zhao, Keneth Thomas Vector Grattan
    Abstract:

    In this paper, the design and underpinning technical principles of the novel design of a negative pressure wave (NPW)-based pipeline Leak Detection System has been reported, which is configured using fiber Bragg grating (FBG) pressure sensors. To evaluate this, a pipeline Leakage test platform has been established and experiments have been conducted, to verify the performance of a System using this FBG-based approach. The results show that a System using FBG-based sensors can accurately determine the pressure change trends along the pipeline and thus allow the calculation of the NPW velocity online. A key comparison is made with traditional NPW Detection techniques, showing that the novel Detection System is capable of achieving the higher Leak-location accuracy and the Detection of smaller Leakage volumes. This arises from the ability of the FBG-based System to allow an increased number of sensors to be multiplexed along the pipeline. Their corresponding output signals generated show a very satisfactory, high signal-to-noise ratio. The System has been evaluated, especially in its response to extraneous signals and thus disturbances caused by the pump starting or stopping can be eliminated. This was achieved through an analysis of the time sequence of the pressure changes captured by the multisensor array being carried out and thus immunity to such effects demonstrated. The System has thus been designed to minimize the instances where a false alarm occurs.

Ichiro Koshijima - One of the best experts on this subject based on the ideXlab platform.

  • Gas pipeline Leak Detection System using the online simulation method
    Computers & Chemical Engineering, 2000
    Co-Authors: Kentaro Fukushima, Reiko Maeshima, Hitoshi Shiraishi, Akira Kinoshita, Kenya Fukushima, Ichiro Koshijima
    Abstract:

    Management of natural gas pipeline is an important task for economical and safety operation, loss prevention and environmental protection from methane emission. A Leak Detection of gas pipeline, therefore, plays a key role in the overall integrity management for a pipeline System. Especially for a long pipeline operated alongside of densely populated areas, a Leak Detection System is an indispensable condition to allow its construction. In this paper, a Leak Detection method based on a dynamic simulation with wave equations is presented. An industrial application to one of the longest gas pipeline is also presented with its performance information.