You are being redirected because this document is part of your ASTM Compass® subscription.
    This document is part of your ASTM Compass® subscription.

    STP1398

    Measurement of Eigenvalue Separation in Coupled-Core Systems using Optical Fiber with Scintillator

    Published: 0


      Format Pages Price  
    PDF (156K) 8 $25   ADD TO CART
    Complete Source PDF (17M) 856 $273   ADD TO CART

    Cite this document

    X Add email address send
    X
      .RIS For RefWorks, EndNote, ProCite, Reference Manager, Zoteo, and many others.   .DOCX For Microsoft Word


    Abstract

    The first-harmonic eigenvalue separation of loosely coupled cores constructed at the light-water moderated/reflected core in the Kyoto University Critical Assembly (KUCA) have been measured using optical fiber with scintillator. The method is based on the measurement of flux tilt introduced by the asymmetric insertion of control rod in the two coupled core halves. The use of the optical fiber detector enabled the rapid flux tilt measurement compared to the conventional activation wire method. The measured eigenvalue separation showed excellent agreement with the results of the rod drop and Feynman-α measurements. The flux tilt method gave the smallest experimental error, and is applicable to a less loosely coupled system with a larger eigenvalue separation, where the conventional Feynman-α method is hardly applicable.

    Keywords:

    first-harmonic eigenvalue separation, coupled core, flux tilt, optical fiber, scintillator, KUCA


    Author Information:

    Unesaki, H
    Instructor and professor, Research Reactor Institute, Kyoto University, Osaka,

    Shiroya, S
    Instructor and professor, Research Reactor Institute, Kyoto University, Osaka,

    Hashimoto, K
    Associate professor and instructor, Atomic Energy Research Institute, Kinki University, Osaka,

    Horiguchi, T
    Associate professor and instructor, Atomic Energy Research Institute, Kinki University, Osaka,

    Takeda, T
    Professor, associate professor and instructor, Graduate School of Engineering, Osaka University, Osaka,

    Yamamoto, T
    Professor, associate professor and instructor, Graduate School of Engineering, Osaka University, Osaka,

    Kitada, T
    Professor, associate professor and instructor, Graduate School of Engineering, Osaka University, Osaka,

    Aizawa, O
    Professor, Musashi Institute of Technology, Tokyo,

    Yamamoto, J
    Associate professor, Setsunan University, Osaka,


    Committee/Subcommittee: E10.08

    DOI: 10.1520/STP13655S