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Radioactive material assaying

A radioactive material, active technology, applied in the field of material determination, can solve the problems of improper disposal, incorrect classification of waste materials, etc.

Active Publication Date: 2017-08-18
SOLETANCHE FREYSSINET SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This can lead to incorrect sorting and improper disposal of waste materials

Method used

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  • Radioactive material assaying
  • Radioactive material assaying
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Examples

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Embodiment Construction

[0043] figure 1 is a flowchart illustrating an embodiment of the method of the present invention. In this example, nuclear waste material was assayed using a total gamma detector for activity measurements and a high resolution gamma spectrometer (HRGS) for spectral measurements. The activity derived from the total gamma counts was compared to a threshold to classify the sample for disposal. Activity and / or threshold values ​​are calculated based on the putative radionuclide fingerprint of the sample.

[0044] One sample out of every 50 was analyzed using HRGS. HRGS evaluates the actual fingerprint of the sample. An on-site processor in communication with the HRGS processes the data obtained for the sample to determine whether it corroborates the putative fingerprint.

[0045] If the putative fingerprint is corroborated, this indicates that the threshold comparison calculated from the putative fingerprint is appropriate, and thus the classification of the material is correc...

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Abstract

A method of assaying a potentially radioactive material comprises selecting a plurality of samples from a material mass on a site (200). In a sequence of steps (104, 106, 108, 110, 112), an activity measurement based on a gross count of each of the samples (212) in the plurality of samples is performed on the site (200), and the activity measurement is compared with one or more activity thresholds in order to categorise the radioactive material for disposal purposes. The threshold(s) and / or activity measurement are based on an assumed parameter set. In a further step (114), sample x from every y of the plurality of samples is selected with the x being less than the y, and a spectroscopic measurement of the emitted radiation from the sample x is performed on the same site (200). In a further step (116), it is automatically determined whether the spectroscopic measurement corroborates the assumed parameter set before the y samples leave the site (200) for disposal purposes.

Description

technical field [0001] The present application relates generally to materials assays, and in particular to efficient and reliable methods of assaying potentially radioactive materials. Background technique [0002] The advent of nuclear-based technologies, especially nuclear power generation, has created new challenges in waste management. In the face of decreasing fossil fuel supplies and environmental concerns over carbon emissions, the use of nuclear energy is expected to increase in an attempt to meet the energy needs of a growing population. Therefore, effective and reliable radioactive waste management is very important. [0003] An important part of radioactive waste management is assaying or monitoring, ie assessing the radioactivity of materials so that said materials can be disposed of appropriately. For example, for the remediation of contaminated areas at reactor sites, characterization of soil samples is required to separate the land into clean and contaminate...

Claims

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Application Information

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IPC IPC(8): G01T1/167G01N33/24G21F9/34
CPCG01N33/24G01T1/167G21F9/34G01T1/169
Inventor H·贝多
Owner SOLETANCHE FREYSSINET SA