Natural Tracer Profiles Across Argillaceous Formations

The CLAYTRAC Project

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This technical report describes the results of the Nuclear Energy Agency's CLAYTRAC project, in which natural tracer data from nine sites was evaluated to assess potential impacts of disposal of radiological waste in geological repositories. It shows scientific information from numerous sites and applies robust analytical methods to improve the understanding of radionuclide migration and evolution of sites for deep geological disposal. These results improve the understanding of sites, and thus the confidence in safety, for geological disposal of radioactive waste.



Appendix A1

Methodology of Data Collection – Example of a Data Tracking Document

Nuclear Energy Agency

An example of a Data Tracking Document is shown below for borehole MAR203 at Gard/Marcoule, France. The empty forms were sent to the organisations who supplied information on their site(s) and also used the forms as checklists and general guides to what is needed. The Core Group then evaluated all information received and filled in the Data Tracking Document for each site (areas shaded grey in the example below). For each item, the name of the underlying electronic document was noted (if applicable), together with the references to sources of the information. Very importantly, screening procedures and all changes done to the data were recorded, together with comments.


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