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      <marc:subfield code="a">"This regulatory document is part of the CNSC's regulated facilities and activities series of regulatory documents. … Regulatory document REGDOC-1.2.1, Guidance on Deep Geological Repository Site Characterization, sets out guidance on site characterization for a deep geological repository (DGR) facility for radioactive waste. Information gathered for site characterization may be used in subsequent licence applications. This document supersedes R-72, Geological Considerations in Siting a Repository for Underground Disposal of High-Level Radioactive Waste, published in September 1987"--Preface, page i.</marc:subfield>
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