Radioactive Waste Management Considering Timescales in the by OECD Organisation for Economic Co-operation and Develop

By OECD Organisation for Economic Co-operation and Develop

A key problem within the improvement of safeguard situations for the deep geological disposal of radioactive waste is dealing with the very long time body over which the radioactive waste is still detrimental. The intrinsic threat of the waste decreases with time, yet a few chance is still for very lengthy classes. This record reports the present prestige and ongoing discussions of this factor, addressing such matters as moral rules, the evolution of the threat through the years, uncertainties within the evolution of the disposal procedure (and how those uncertainties themselves evolve), the soundness and predictability of the geological surroundings, repository making plans and implementation together with regulatory specifications, siting judgements, repository layout, the advance and presentation of safeguard instances and the making plans of pre- and post-closure institutional controls comparable to tracking standards.

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By OECD Organisation for Economic Co-operation and Develop

A key problem within the improvement of safeguard situations for the deep geological disposal of radioactive waste is dealing with the very long time body over which the radioactive waste is still detrimental. The intrinsic threat of the waste decreases with time, yet a few chance is still for very lengthy classes. This record reports the present prestige and ongoing discussions of this factor, addressing such matters as moral rules, the evolution of the threat through the years, uncertainties within the evolution of the disposal procedure (and how those uncertainties themselves evolve), the soundness and predictability of the geological surroundings, repository making plans and implementation together with regulatory specifications, siting judgements, repository layout, the advance and presentation of safeguard instances and the making plans of pre- and post-closure institutional controls comparable to tracking standards.

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Extra info for Radioactive Waste Management Considering Timescales in the Post-closure Safety of Geological Disposal of Radioactive Waste

Sample text

The stability and the predictability of the geological environment (or any system component) are clearly related. Nevertheless, the period during which well-supported statements about the evolution of a component can be made does not necessarily coincide with the period during which the component will, in reality, remain stable. 28 geologically stable if perturbing geological events and processes can either be excluded, or shown to be sufficiently rare, slow, or the consequences sufficiently small that repository safety will not be compromised over the required time frame.

In the context of geological disposal, a site is generally considered to be 9. The stability and the predictability of the geological environment (or any system component) are clearly related. Nevertheless, the period during which well-supported statements about the evolution of a component can be made does not necessarily coincide with the period during which the component will, in reality, remain stable. 28 geologically stable if perturbing geological events and processes can either be excluded, or shown to be sufficiently rare, slow, or the consequences sufficiently small that repository safety will not be compromised over the required time frame.

The positive outcome of the recent peer review of the French Dossier 2005 Argile (Andra, 2005) also shows that safety cases have and can effectively address the potential effects on long-term safety of an open period. Ensuring that there is no unacceptable long-term impact of the pre-closure phase on post-closure safety is widely seen as an objective in the planning of repository construction, operation and closure. The specific perturbations that need to be avoided can depend strongly on the specific barriers and safety functions provided by the system and the degree to which these are emphasised in the safety case.

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