Authors:
L. RobinsonOak Ridge National Laboratory P.O. Box X 37831 Oak Ridge TN USA

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R. HobbsOak Ridge National Laboratory P.O. Box X 37831 Oak Ridge TN USA

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F. DyerOak Ridge National Laboratory P.O. Box X 37831 Oak Ridge TN USA

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L. PughOak Ridge National Laboratory P.O. Box X 37831 Oak Ridge TN USA

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J. SnelgroveArgonne National Laboratory 9700 South Cass Avenue 60439 Argonne IL USA

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N. TeasleyOak Ridge National Laboratory P.O. Box X 37831 Oak Ridge TN USA

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Abstract  

This paper describes an automated fuel element scanning system, based upon gamma-ray spectroscopy, that has been developed at the Oak Ridge Research Reactor. The scanning system is located in the reactor pool and allows fuel elements to be scanned nondestructively at various intervals during their core life. Fuel elements are located 430 cm beneath the pool. Gamma-ray measurements (aided by a collimating assembly) are made using a GeLi detector positioned above the pool water. Measurements of137Cs count rates from relatively cold elements indicate that the counting data obtained using this apparatus is reproducible within 5%. Power distribution in the reactor's core (element by element) has been derived from140La counting data. The method of determining power is discussed briefly and some example results are presented.

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation
1968
Volumes
per Year
1
Issues
per Year
12
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)