Some of the unresolved issues in the analysis of severe accident phenomena

TL;DRAbstract

In this paper, we will identify a number of examples of unresolved issues which could be important to source term analysis. Individually, each could limit the applicability of conclusion based on source term research performed to date. Taken together, they illustrate that, while best estimate analysis offers many advantages compared to bounding calculations, it also is considerably more difficult and prone to error. Exceptional care is required to ensure that all plausible pathways and event sequences have been considered before difinitive statements are made. In other words, although the best-estimate approach offers the only prospect for improved realism, a payoff in the form of across-the-board source term reductions cannot be expected immediately, or on a pre-defined schedule. 53 refs.

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