Site Characterization at the Paducah and Portsmouth Gaseous Diffusion Plants


C. R. Dulin, J. B. O'Connell, R. F. Winterfield


Site characterization of he United States Enrichment Corporation (USEC) gaseous diffusion plants have been performed to meet posting requirements of 10 CFR 20, as incorporated by reference to 10 CFR 76, Certification of Gaseous Diffusion Plants. This activity serves as a basis for radiological postings and to place radiological materials in these former U.S. Department of Energy (DOE) facilities under appropriate controls with the Nuclear Regulatory Commission (NRC) as regulator. Characterization involved surveys of indoor and outdoor facilities, equipment, materials, tools, and 770+ acres of land composed of ground, roads, and parking area. A new approach was developed to monitor large areas for beta emitters onsite. Six-foot-wide towed arrays of large gas proportional counters were utilized. These systems used Global Positioning Satellite (GPS) and ultrasonic devices to provide location data that were incorporated electronically with the monitoring data in a computerized database. Post processing was then used to extract net monitoring results of the site from the raw data containing both "normal" background and significant shine contributors near large uranium cylinder storage areas. Multiple-level contamination maps were generated from this database.


This abstract was presented at the 33rd Annual Midyear Meeting, "Instrumentation, Measurements, and Electronic Dosimetry", Poster Session, 1/30/2000 - 2/2/2000, held in Virginia Beach, VA.

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