Study of environmental radioactivity in Palestine by in situ gamma-ray spectroscopy

2009 ◽  
Vol 135 (1) ◽  
pp. 43-46
Author(s):  
A. Lahham ◽  
H. Al-Masri ◽  
A. Judeh
Keyword(s):  
Gamma Ray ◽  
Environmental Radioactivity ◽  
Gamma Ray Spectroscopy

In situ subterranean gamma-ray spectroscopy

1977 ◽  
Vol 143 (2) ◽  
pp. 385-389 ◽  
Author(s):  
H.L. Nielson ◽  
N.A. Wogman ◽  
R.L. Brodzinski
Keyword(s):  
Gamma Ray ◽  
Gamma Ray Spectroscopy

Improved in situ mineral and petrophysical interpretation with neutron-induced gamma-ray spectroscopy elemental logs

2016 ◽  
Vol 4 (2) ◽  
pp. SF31-SF53 ◽  
Author(s):  
Oyinkansola Ajayi ◽  
Carlos Torres-Verdín
Keyword(s):  
Gamma Ray ◽  
Water Saturation ◽  
Matrix Effects ◽  
Rock Formations ◽  
Wide Range ◽  
Gamma Ray Spectroscopy ◽  
New Interpretation ◽  
Mineral Concentrations ◽  
Interpretation Method

Neutron logs are routinely expressed as apparent neutron porosity based on the assumption of a freshwater-saturated homogeneous formation with solid composition equal to either sandstone, limestone, or dolomite. Rock formations are often extremely heterogeneous and consist of different minerals and fluids in varying proportions, which cause simultaneous matrix and fluid effects on neutron logs. Detailed quantification of formation mineral composition enables the correction of matrix effects on measured neutron logs to unmask fluid effects; this in turn enables accurate quantification of porosity and water saturation. Neutron-induced gamma-ray spectroscopy is one of the most direct means available to quantify in situ formation mineralogy but available spectroscopy-based interpretation methods are usually tool dependent and incorporate empirical correlations. We have developed a new interpretation method to quantify mineral concentrations through the joint nonlinear matrix inversion of measured spectroscopy elemental weight concentrations and matrix-sensitive logs, such as gamma ray, matrix photoelectric factor, matrix sigma (neutron capture cross section), and matrix density. The estimated mineralogy was used in the correction of matrix effects on porosity logs and subsequent calculation of true formation porosity. The water saturation was quantified through joint petrophysical interpretation of matrix-corrected porosities and resistivity measurements using an appropriate saturation model. The developed inversion-based interpretation method is applicable to a wide range of formation lithologies, well trajectories, and borehole environments (including open and cased hole environments), and it is independent of tool and neutron source type. Verification results with synthetic and field cases confirm that the spectroscopy-based algorithm is reliable and accurate in the quantification of mineral concentrations, matrix properties, porosity, and hydrocarbon saturation.

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

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.

scholarly journals Rapid in situ assessment of radiocesium wood contamination using field gamma-ray spectroscopy to optimise felling

2020 ◽  
Vol 218 ◽  
pp. 106259
Author(s):  
Adam Varley ◽  
Andrew Tyler ◽  
Maksim Kudzin ◽  
Viachaslau Zabrotski ◽  
Justin Brown ◽  
...  
Keyword(s):  
Gamma Ray ◽  
In Situ Assessment ◽  
Gamma Ray Spectroscopy

Mobile underwater in situ gamma-ray spectroscopy to localize groundwater emanation from pockmarks in the Eckernförde bay, Germany

2018 ◽  
Vol 140 ◽  
pp. 305-313 ◽  
Author(s):  
Dionisis L. Patiris ◽  
Christos Tsabaris ◽  
Mark Schmidt ◽  
Aristomenis P. Karageorgis ◽  
Aristides M. Prospathopoulos ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Gamma Ray Spectroscopy

In situ elemental analysis using neutron-capture gamma-ray spectroscopy

1982 ◽  
Vol 193 (1-2) ◽  
pp. 353-357 ◽  
Author(s):  
Larry G. Evans ◽  
Jeffrey R. Lapides ◽  
Jacob I. Trombka ◽  
Dal H. Jensen
Keyword(s):  
Elemental Analysis ◽  
Neutron Capture ◽  
Gamma Ray ◽  
Gamma Ray Spectroscopy

A NUMERICAL METHOD FOR THE CALIBRATION OF IN SITU GAMMA RAY SPECTROSCOPY SYSTEMS

2010 ◽  
Vol 98 (5) ◽  
pp. 657-671 ◽  
Author(s):  
S. C. Dewey ◽  
Z. D. Whetstone ◽  
K. J. Kearfott
Keyword(s):  
Numerical Method ◽  
Gamma Ray ◽  
Gamma Ray Spectroscopy

A NEUTRON-INDUCED GAMMA-RAY SPECTROSCOPY LOGGING METHOD FOR DETERMINING FORMATION WATER SALINITY

2019 ◽  
Author(s):  
Lili Tian ◽  
Feng Zhang ◽  
Quanying Zhang ◽  
Qian Chen ◽  
Xinguang Wang ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Water Salinity ◽  
Formation Water ◽  
Gamma Ray Spectroscopy ◽  
Formation Water Salinity
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