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Frequency of SNF Misload for Uncanistered Fuel Waste Package

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Abstract

The purpose ofthis engineering calculation is to estimate the frequency of misloading spent nuclear fuel (SNF) assemblies that would result in exceeding the criticality design basis of a waste package (WP). This type of misload - a reactivity misload - results from the incorrect placement of one or more fuel assemblies into a waste package such that the criticality controls do not match the required controls for the fuel assemblies. An actual criticality event cannot occur in a WP unless a moderator (e.g., water) is present While a thermal misload is possible (load fuel that exceeds the thermal limits of a WP), it is not addressed in this analysis.

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