Objective
The decisive criterion for acceptance of radioactive waste packages in an underground repository is the knowledge of the specific activity of the conditioned waste and the total activity of the waste package which in the case of a homogeneous waste matrix is normally straightforward. In the case of shielded structures or inhomogeneous fillings, the calculation must include shielding factors which range from 1 for homogeneous filling to 20. A better estimation of the shielding properties by computer tomography is the aim of this contract. The objective is a direct measurement of the distribution of and m/g or m in shielded structures and heterogeneous fillings of waste drums by attenuation measurement and computer tomography. The application of computer tomography (CT) the g-scanner "GERNOD" will be done in close cooperation with groups in KFA and BAM.
Quality control of radioactive waste packages prior to their disposal in underground repositories can be achieved by either non-destructive or destructive analysis of the waste packages. The decisive criterion for acceptance is knowledge of the specific activity of the conditioned waste and the total activity of the waste package. Determination of the specific activity and total activity is straightforward in the case of a homogeneous waste matrix of densities between 0.1 and 3 g/cm{3}. In the case of shielded structures or inhomogeneous fillings, the calculation must include shielding factors which range from 1 for homogeneous filling to 20. This project aims to produce a better estimation of the shielding properties by computer tomography. The direct objective is a measurement of the distribution of specific and total activity in shielded structures and heterogeneous fillings of waste drums by attenuation measurement and computer tomography. Considerations for an extension of the existing gamma scanner for inclusion of computer tomography and tests for the application of existing software programs on this computer are underway. The literature survey led to a reconsideration of the optimum mechanical layout and the best kind of radiation source.
Work programme:
An existing passive gamma-scanner has been modified to obtain gamma ray screening capability by
- addition of a 7 Ci Co-60 gamma source for transmission measurements
- modification of the turntable for the drum and upgrading the mechanical system for translatory movement.
The installation of a suitable computer tomography system for the examination of samples with uncommon composition and density distribution requires
- the development of tomography software
- the design of technical equipment in order to synchronize mechanical movement, countrate measurements and absorption data transfer to the computer
- the visualisation of density and activity distribution and estimating the total activity of the waste drum.
Comparative test measurements are being carried out
- on dummies with different materials for testing purposes
- on typical waste drums with inner shielding structures
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- engineering and technology other engineering and technologies nuclear engineering nuclear waste management
- natural sciences computer and information sciences software
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Programme(s)
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Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
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Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Funding Scheme
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
52428 Jülich
Germany
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.