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Preliminary Assessment of a Technical Basis for Establishing a Retrievability Period. Technical Report

机译：建立可回收期的技术基础的初步评估。技术报告

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A methodology has been developed to establish an appropriate retrievability period length on the basis of technical considerations. The rationale developed indicates that the length is dependent on the time after waste emplacement required to verify site characterization and in situ environments, to confirm repository design and predicted performance, and to confirm system operability. Preliminary assessments of in situ measurements and subsequent analyses that should be performed to reduce uncertainties resulted in the preliminary recommendation of a retrievability period of several years, to no longer than 5 to 10 years to assess in situ environments, processes and events during which some sealed rooms might not be backfilled; and maintenance of a retrievable mode until assured that no unacceptable geologic characteristics will be encountered during construction (this period could be minimal or up to the full length of the construction period (several tens of years).

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