Download Geological disposal of radioactive waste Technological by International Atomic Energy Agency (IAEA) PDF

By International Atomic Energy Agency (IAEA)

This e-book examines the potential technological implications of retrievability while constructing designs for geological nuclear waste repositories. Disposal innovations together with situations for retrieving disposed nuclear waste were pushed through a wish to deal with or take advantage of new technical advances in waste administration and fabrics applied sciences, in addition to altering social, monetary and political stipulations. during this recognize, the ebook analyzes the recommendations presently being constructed via a few nations for the retrieval of emplaced waste programs and any technological provisions that are supposed to be integrated into the layout, development, operational and closure levels of the repository. it truly is designated at these liable for deep geological disposal courses, together with repository designers and selection makers.

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The greatest effort would be required during the post-closure phase after the repository is sealed. In the case of the sealed repository, the time of retrieval could vary from a few years to many decades after re-entry. Retrieval was considered in both the in-room and in-borehole repository design options identified above. Based on this work, it is concluded that it is feasible to retrieve containers from the repository [I-7–I-9]. However, efforts have not been undertaken to optimize the retrieval process.

Rock supports would be used, if and when necessary. In addition, normal supporting systems such as lifts, ventilation and water pumping would be needed. After the necessary surface access points and tunnels have been opened and the construction work completed, the canister retrieval process would continue in the same way as described above. 2. Retrieval process for Swiss concept The technological effort associated with the retrieval operation depends on the accessibility of the disposal tunnels and is related to the particular implementation phase: while waste emplacement is in progress, the retrieval of HLW/SF canisters is technically feasible (with little effort) by reversal of the emplacement procedure.

INTERNATIONAL ATOMIC ENERGY AGENCY, Radioactive Waste Management Glossary 2003 Edition, IAEA, Vienna (2003). INTERNATIONAL ATOMIC ENERGY AGENCY, Classification of Radioactive Waste, Safety Series No. 1, IAEA, Vienna (1994). NIREX, Generic Waste Package Specification. Part 1: Specification, Nirex Rep. No. N/104 (2005). SKN, Ethical Aspects of Nuclear Waste, Some salient points discussed at a seminar on ethical action in the face of uncertainty in Stockholm, Sweden, SKN Rep. 29 (1987). , 21–24 May 1999 (1999).

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