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10 years ago in the BRWM's report Rethinking High-Level Radioactive Waste Disposal (NRC, 1990), remains sound advice.
Safety and security assessment experts must communicate their belief that their calculated results, although imperfect, provide sufficiently reliable input for decision makers. As long as one can be accurate in assuring that the levels of radioactivity release are low, precise estimates are not needed. Even with some orders of magnitude of residual uncertainty, the calculated release may be clearly within defined safety goals or limits. All parties involved in the decision-making process should have a consistent and accurate perception of what model-based analysis can and cannot do, so that they do not make erroneous decisions based on incorrect or biased expectations.