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Title: Use of the FIDLER Scintillation Probe for the Characterization of Subsurface Radionuclide Contamination

The Measurement Applications and Development Group at the Oak Ridge National Laboratory has used a FIDLER to characterize a site where numerous localized and dispersed concentrations of uranium had been previously discovered beneath a poured concrete floor. The thick floor impeded the evaluation of the distribution of regions containing uranium without boring numerous holes through the concrete. The purpose of this study was to perform a radiological assessment of the building in preparation for remediation of the site. Integrated counts were taken with the FIDLER probes fixed in place on a systematic grid across the area to be evaluated. The results were then superimposed on a drawing of the area of evaluation. This approach allowed the boundaries of the regions with subsurface contamination to be resolved much better than by using standard survey techniques and decreased the number of borehole samples and subsequent analyses. The study demonstrated that this survey technique provides rapid and essential characterization information and reduces sampling, analytical, and remediation costs.
Authors:
;
Publication Date:
OSTI Identifier:
14627
Report Number(s):
ORNL/CP-104990
TRN: US0106185
DOE Contract Number:
AC05-96OR22464
Resource Type:
Conference
Resource Relation:
Conference: Conference title not supplied, Conference location not supplied, Conference dates not supplied; Other Information: PBD: 14 Nov 1999
Research Org:
Oak Ridge National Lab., TN (US)
Sponsoring Org:
USDOE Office of Science (US)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 54 ENVIRONMENTAL SCIENCES; BOREHOLES; CONCRETES; CONTAMINATION; SAMPLING; URANIUM; SCINTILLATION COUNTERS; SITE CHARACTERIZATION; RADIOECOLOGICAL CONCENTRATION; REMEDIAL ACTION