The presented methodological study illustrates a geostatistical approach suitable for radiological evaluation in nuclear premises. The waste characterization is mainly focused on floor concrete surfaces. By modeling the spatial continuity of activities, geostatistics provide sound methods to estimate and map radiological activities, together with their uncertainty. The multivariate approach allows the integration of numerous surface radiation measurements in order to improve the estimation of activity levels from concrete samples. This way, a sequential and iterative investigation strategy proves to be relevant to fulfill the different evaluation objectives. Waste characterization is performed on risk maps rather than on direct interpolation maps (due to bias of the selection on kriging results). The use of several estimation supports (punctual, 1 m2, room) allows a relevant radiological waste categorization thanks to cost-benefit analysis according to the risk of exceeding a given activity threshold. Global results, mainly total activity, are similarly quantified to precociously lead the waste management for the dismantling and decommissioning project.
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ASME 2011 14th International Conference on Environmental Remediation and Radioactive Waste Management
September 25–29, 2011
Reims, France
Conference Sponsors:
- Nuclear Engineering Division and Environmental Engineering Division
ISBN:
978-0-7918-5498-3
PROCEEDINGS PAPER
Geostatistical Methodology for Waste Optimization of Contaminated Premises
Yvon Desnoyers
,
Yvon Desnoyers
Geovariances, Avon, France
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Didier Dubot
Didier Dubot
CEA, Fontenay-aux-Roses, France
Search for other works by this author on:
Yvon Desnoyers
Geovariances, Avon, France
Didier Dubot
CEA, Fontenay-aux-Roses, France
Paper No:
ICEM2011-59344, pp. 239-244; 6 pages
Published Online:
August 17, 2012
Citation
Desnoyers, Y, & Dubot, D. "Geostatistical Methodology for Waste Optimization of Contaminated Premises." Proceedings of the ASME 2011 14th International Conference on Environmental Remediation and Radioactive Waste Management. ASME 2011 14th International Conference on Environmental Remediation and Radioactive Waste Management, Parts A and B. Reims, France. September 25–29, 2011. pp. 239-244. ASME. https://doi.org/10.1115/ICEM2011-59344
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