Nuclear facilities in the midst of cleanup due to normal routine or unexpected incident face a remarkable challenge – how to safely determine the exact location of radioactive contamination. Such determinations are typically performed with portable count rate instruments operated by personnel wearing protective gear, which can consume many man-hours and expose personnel to radiation or contamination. Some areas may be too small or confined or have limited entry for personnel access. Some areas may be too large, perhaps encompassing a city street, or problematic in another way, such as a fluctuating area of storm water runoff.
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