Radiological mapping of facilities under dismantling process by digital autoradiography - 15230
- CEA Saclay, DEN/DANS/DPC/SEARS/LASE, PC 171, 91191 Gif Sur Yvette (France)
because safety standards have changed. In that context, radioactive waste management is a challenging task faced by existing nuclear power countries. Therefore, characterization is essential to classify wastes and to reduce costs. In many facilities, after the removal of glove boxes, fume cupboards and so on, the remaining materials on the floor, walls, and ceiling must be characterized. Gamma emitters can be detected remotely by commercial devices. However, analytical techniques to detect alpha and beta emitters in situ are generally not well suited for large area investigations. The Digital Autoradiography (DA) technique, initially dedicated to research in biology, was re-routed for final state characterization before facility demolition. It is based on the exposure of radio-sensitive phosphor screens on the materials to characterize. Phosphor screens, after a scanning process, provide a picture of the radioactivity, and are reusable several tens of times. This analytical technique is sensitive to all types of radioactivity, requires neither operators nor electricity during acquisition process, and produces only very few wastes. DA has already been tested in different facilities to obtain semi-quantitative values of C-14 and H-3 activities. Large amount of data gathered to cover the whole surface to be characterized. A Geographic Information System (GIS) associated with geostatistical method has been used to provide Radiological Mapping. This method to interpret Digital Autoradiography results has been proved very efficient to prepare remediation project. (authors)
- Research Organization:
- WM Symposia, Inc., PO Box 27646, 85285-7646 Tempe, AZ (United States)
- OSTI ID:
- 22822759
- Report Number(s):
- INIS-US-19-WM-15230; TRN: US19V0749067674
- Resource Relation:
- Conference: WM2015: Annual Waste Management Symposium, Phoenix, AZ (United States), 15-19 Mar 2015; Other Information: Country of input: France; 6 refs.; Available online at: http://archive.wmsym.org/2015/index.html
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
AEROSOLS
AUTORADIOGRAPHY
CARBON 14
CEILINGS
DEMOLITION
DIGITAL SYSTEMS
FLOORS
GAMMA SOURCES
GEOGRAPHIC INFORMATION SYSTEMS
GLOVEBOXES
GLOVES
MAPPING
NUCLEAR FACILITIES
NUCLEAR POWER
PHOSPHORS
RADIOACTIVE WASTE MANAGEMENT
RADIOACTIVITY
REMEDIAL ACTION
SAFETY STANDARDS
TRITIUM
WALLS