Mechanical shredders are used on thin metal, large volume, LLRW materials to reduce volume and enhance compaction for disposal operations. However, during shredding, atmospheric releases from the intense mechanical action may be produced and must be monitored and controlled to satisfy regulatory and ALARA emission control requirements. Standard analytical and EPA computer models are explored and experimentally reviewed to determine potential releases given adequate knowledge of input parameters such as radioactive material sources, waste material-volume-configurations, prevailing meteorological conditions, and airborne material characteristics. Results of these studies, modeling efforts, and measurements are presented together with EPA SCREEN3 computer output files.

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