NDLI: Spectral shape analysis for contaminant logging at the Hanford site

Content Provider	IEEE Xplore Digital Library
Author	Wilson, R.D. Koizumi, C.J. Meisner, J.E. Stromswold, D.C.
Copyright Year	1998
Description	Author affiliation: MACTEC-ERS, Grand Junction, CO, USA (Wilson, R.D.)
Abstract	A spectral shape factor log has been developed to provide information on the spatial distribution of gamma-ray-emitting contaminants detected by passive logging of boreholes that surround the buried high-level nuclear waste tanks at the US Department of Energy's Hanford Site near Richland, Washington. Many boreholes intersect plumes of contaminants that leaked from the tanks. Spectral shape analysis has been able to distinguish /sup 137/Cs and /sup 60/Co uniformly distributed in the formation from borehole-localized and radially remote distributions of these contaminants. A uniform distribution is evidence for a formation-migration plume while a borehole-localized contaminant distribution indicates that the borehole was a preferential pathway for contaminant migration. Knowledge of the contaminant distribution assists the process of formation contamination assessment and of estimation of remediation costs. In a few cases, the shape factor log has identified the bremsstrahlung-producing contaminant /sup 90/Sr//sup 90/Y. Shape factor data processing and interpretation methods were optimized using results of Monte Carlo simulations of the logging measurements. The accuracy of the Monte Carlo simulations was confirmed through experiments with known source distributions.
Starting Page	457
Ending Page	461
File Size	489481
Page Count	5
File Format	PDF
ISBN	0780342585
ISSN	10823654
DOI	10.1109/NSSMIC.1997.672623
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-11-09
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Spectral shape Spectral analysis Shape measurement Gamma ray detection Gamma ray detectors Radioactive pollution US Department of Energy Contamination Costs Strontium
Content Type	Text
Resource Type	Article

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