CORDIS fornisce collegamenti ai risultati finali pubblici e alle pubblicazioni dei progetti ORIZZONTE.
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Risultati finali
It is widely recognised that monitoring is required to support the implementation of geological disposal. The aim of this Thematic Network was to bring together expertise from many countries in order to:
- Understand the approaches to monitoring in various programmes
- Distil consensus views and recognise alternative approaches to monitoring;
- Share technical knowledge and experience amongst the participating organisations;
Approaches to monitoring
All the participants of this Thematic Network are in agreement on the importance of monitoring related to establishing baseline conditions, maintaining operational safety, compliance (including safeguards) and in support of model confirmation. Any differences in approach to such monitoring relate mainly to the extent to which monitoring is seen as confirming processes related to evolution of the repository and its long-term safety. It is important to understand the reasons for these differences and the role played by monitoring within any safety and repository implementation strategy.
Minimal monitoring may be preferred if the purpose is limited to confirming constant properties and if uncertainties about barrier and near field evolution are small. More detailed monitoring may be foreseen if potential degradation of the repository is more complex or such that early measurement will confirm a satisfactory, or otherwise, evolution. Specially instrumented test or pilot facilities may be used in a research mode if this is thought desirable.
The extent of monitoring should be limited to that which could reveal useful results for the decision making process or for the confirmation of safety. The fact that monitoring takes place must be explained to audiences and it is important not to give the impression that such monitoring indicates a lack of confidence in the safety of the disposal system.
Technology
The technology required for monitoring parameters, which are specifically relevant to repositories, has been and will continue to be developed in URLs and in relation to mining and hydrocarbon exploration. It needs to be emphasised that there is already extensive experience of monitoring related to radioactive waste disposal that comes from site investigations and experiments in URLs. Compliance monitoring is also standard practice within the nuclear industry.
Limitations exist, however, especially with regard to the longevity and reliability of monitoring equipment, especially under harsh environmental conditions, and calibration drift in remote locations may be a problem. False expectations should not be raised either with respect to what is practical over long timescales, or the utility of measurements and the ability (or need) to respond to the results of monitoring. That a parameter can be measured is not, however, a good reason for its measurement. Its measurement is justified only if it contributes to an increase in understanding or confidence in safety, and where it is possible to interpret the measurements.
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