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Development of a Directional Gamma Ray Detector for in-Core Fuel Motion Monitoring

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3 Author(s)
Cox, S.A. ; Argonne National Laboratory Argonne, Illinois 60439 ; Beyerlein, R.A. ; LeVert, F.E.

In-core detectors should have wide application in the reactor safety program. A detector development program has been underway at Argonne National Laboratory to provide in-core detectors which are either neutron or gamma sensitive. The present paper describes one of the detectors under consideration for in-core fuel motion monitoring. It is gamma sensitive and has been tested in the core region of the Argonne Research Reactor (CP-5). The detector performed well over a 5-week period and yielded a directional discrimination factor, front to back, of 10 to 1, in good agreement with earlier tests conducted using a low power reactor and a radium source.

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Nuclear Science, IEEE Transactions on  (Volume:25 ,  Issue: 1 )