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The High Flux Isotope Reactor at the Oak Ridge National Laboratory was upgraded to install a cold source in horizontal beam tube number 4. Calculations were performed and measurements were made to determine nuclear heating within the cold source and dose rates within and outside a shield tunnel surrounding the beam tube. This report briefly describes the calculations and presents comparisons of the measured and calculated results. Some calculated dose rates are in fair-to-good agreement with the measured results, while others, particularly those at the shield interfaces, differ greatly from the measured results. The calculated cold source nuclear heating is in good agreement with the measured heating. xi

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