Accession Number : ADA293635

Title :   Johnston Atoll Plutonium Cleanup Project. Contract Bridge Report.

Descriptive Note : Technical rept. 1 Jun-5 Aug 93,

Corporate Author : TMA/EBERLINE ALBUQUERQUE NM

Personal Author(s) : Hellier, Charles L. ; Doane, Richard W.

PDF Url : ADA293635

Report Date : 01 APR 1995

Pagination or Media Count : 195

Abstract : This report continues the documentation of the operation of TMA/Eberline's Segmented Gate System technology for removing mixed plutonium and americium contamination at DNA's Johnston Atoll site. Contaminated feed is conveyed under arrays of radiation detectors coupled with sophisticated computer software developed by Eberline Instrument Corporation. Segmented gates (chutes) on pneumatically-driven pistons move forward when contamination is detected to remove only the contaminated portion from the main flow of feed material. Only about one pint of contaminant is removed during each diversion event. At the JA site, a 98% volume reduction has been achieved, with the remediated soil cleaned to DNA's criteria for release for unrestricted use of 500 Bq/kg total transuranic alpha contamination and no "hot" particles of greater than 5000 Becquerrels. The low level waste concentrate is expected to be packaged for shipment to an approved defense waste disposal site. jg

Descriptors :   *RADIOACTIVE MATERIALS, *WASTE DISPOSAL, *CLEANING, *PLUTONIUM, *ATOLLS, *AMERICIUM, COMPUTER PROGRAMS, PISTONS, RADIATION, REMOVAL, DETECTORS, CONTRACTS, DEFENSE SYSTEMS, MATERIALS, HIGH TEMPERATURE, SITES, ARRAYS, SOILS, PARTICLES, OPERATION, LOW LEVEL, INSTRUMENTATION, MIXING, FLOW, WASTES, CONTAMINATION, FEEDING, SEGMENTED, BRIDGES, PNEUMATIC EQUIPMENT, JOHNSTON ISLAND.

Subject Categories : Inorganic Chemistry
      Radiation and Nuclear Chemistry
      Miscellaneous Materials
      Radiation Pollution and Control

Distribution Statement : APPROVED FOR PUBLIC RELEASE