Johnston Atoll Plutonium Contaminated Soil Cleanup Project. Quarterly report No. 3, 7 February-30 April 1994
During this production period, the Scope of Work included movement of soil to and from the plant, processing contaminated soil through the Segmented Gate System (SGS) and Soil Washing System, packaging of waste soil for shipment, identification and implementation of process improvements, data collection and validation, and compliance with all applicable regulations governing environmental safety and health. The SGS utilizes arrays of sensitive radiation detectors coupled with sophisticated computer software to segregate contaminated soil from a moving feed supply on conveyor belts. Contaminated soil is diverted to a `hot` path for plutonium particles greater than 5000 Becquerels or to a supplemental soil washing process designed to remove dispersed low level contamination from a soil faction consisting of very small particles. Low to intermediate levels of contamination are removed from the soil to meet DNA`s criteria for unrestricted use of less than 500 Becquerels per kilogram of soil, with no `hot` particles.
- Research Organization:
- Thermo Nutech, Oak Ridge, TN (United States)
- OSTI ID:
- 445724
- Report Number(s):
- AD-A-318567/5/XAB; CNN: Contract DNA001-93-C-0148; TRN: 70490554
- Resource Relation:
- Other Information: PBD: Nov 1996
- Country of Publication:
- United States
- Language:
- English
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