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U.S. Department of Energy
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Status report on risk assessment for nuclear waste disposal. Interim report

Technical Report ·
DOI:https://doi.org/10.2172/5431822· OSTI ID:5431822
This document reports the results of a comparative analysis and evaluation of reported studies on long-term safety for geologic disposal of nuclear wastes. The scope of work included consideration of uncertainty issues and their impact on results; assessment of the effects of design, siting and operational strategy alternatives on safety levels; and assessment of the adequacy of scope of the available results. Results obtained by the studies reviewed are reconciled and analyzed by normalizing the results to a common basis of repository contents at closure and environmental scenario conditions. The normalization greatly reduces the range of results and produces two classes of risk predictions: conservative (extreme) case studies for which individual doses are about 1% of background, and less conservative, more realistic studies for which doses are about a thousand times lower than those for the conservative studies. The scope of work also includes a comparative analysis of safety levels for disposal of spent fuel and vitrified high-level waste. The inherently higher risk levels associated with spent fuel disposal are demonstrated. The report concludes with a discussion of significant resolved and unresolved safety issues. It also discusses future work needed.
Research Organization:
Analytic Sciences Corp., Reading, MA (USA)
OSTI ID:
5431822
Report Number(s):
EPRI-NP-1197
Country of Publication:
United States
Language:
English