Estimating Fracture Height From Gamma Ray Spectroscopy of Radioactive Tracers: A Case Study

USES OF THE GAMMA‐RAY SPECTROMETER IN MINERAL EXPLORATION

Geophysics ◽

10.1190/1.1438787 ◽

1960 ◽

Vol 25 (5) ◽

pp. 1054-1076 ◽

Cited By ~ 8

Author(s):

John L. Mero

Keyword(s):

Gamma Ray ◽

Mineral Exploration ◽

Well Logs ◽

Radioactive Tracers ◽

Correlation Studies ◽

Gamma Ray Spectrometer ◽

Gamma Ray Spectroscopy ◽

Potential Applications ◽

Rock Analysis ◽

Erratic Behavior

Gamma‐ray spectroscopy offers a rapid and reliable radiometric method of analysis of uranium and/or thorium ores. Methods of ore analysis are described and experimental results are presented. The uranium‐thorium ratios of rocks, which are important in strata recognition and correlation studies, can be determined directly by gamma‐ray spectroscopy without the necessity of making individual uranium or thorium assays. Analysis of potash ores is facilitated with a gamma‐ray spectrometer. Erratic behavior of gamma‐ray well logs can often be resolved by studying the gamma‐ray spectra of these logs. Neutron‐activation, followed by gamma‐ray spectral analysis, of common earth materials offers a method of borehole rock analysis for elements such as calcium, hydrogen, chlorine, sulphur and magnesium. Data in studies employing radioactive tracers can often be enhanced through use of a gamma‐ray spectrometer. Other present and potential applications of the gamma‐ray spectrometer in mineral exploration are also discussed.

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Geostatistical Mapping of Cs-137 Contamination Depth in Building Structures by Integrating ISOCS Measurements of Different Spatial Supports

Volume 2: Facility Decontamination and Decommissioning; Environmental Remediation; Environmental Management/Public Involvement/Crosscutting Issues/Global Partnering ◽

10.1115/icem2013-96234 ◽

2013 ◽

Author(s):

B. Rogiers ◽

S. Boden ◽

D. Jacques

Keyword(s):

Radioactive Waste ◽

Gamma Ray ◽

Future Application ◽

Building Structures ◽

Gamma Ray Spectroscopy ◽

Reliable Methods

Reliable methods to determine the contamination depth in nuclear building structures are very much needed for minimizing the radioactive waste volume and the decontamination workload. This paper investigates the geostatistical integration of in situ gamma-ray spectroscopy measurements of different spatial supports. A case study is presented from the BR3 decommissioning project, yielding an estimated reduction of waste volume of ∼35%, and recommendations are made for future application of the proposed methodology.

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