Defense Nuclear Facilities Defense Nuclear Facilities Safety Board Staff Issue Report Subject: Aerosol Entrainment Coefficient Based on Testing and Data Analyses for the Waste Treatment and Immobilization Plant
نویسندگان
چکیده
Over the Jast several years, the Waste Treatment and Immobili zation Plant (WTP) contractor has executed a test program and analysis effort to establish an aerosol entrainment coefficient (AEC) value for confinement ventilation system designs. The Board advises that the recommended AEC values from this program may not bound expected conditions at the WTP. The AEC values are key design parameters for sizing high-efficiency particulate air (HEP A) filters. The current safety basis for the Pretreatment and High-Level Waste Facilities rely on the HEPA filters as a safety control for several design basis accidents. Use of incorrect AEC values may produce undersized HEP A fi lter designs that would not perform their safety function to provide filtration of radioactive rnatetial. Futther details on the technical concerns are discussed in the enclosed report.
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