Gas-phase decontamination demonstration on PORTS cell X-25-4-2. Final technology status report

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Description

The Long-Term, Low Temperature (LTLT) process is a gas-phase in situ decontamination technique which has been tested by LMES/K-25 personnel on the laboratory scale with promising results. The purpose of the Gas-Phase Decontamination Demonstration at PORTS was to evaluate the LTLT process on an actual diffusion cascade cell at conditions similar to those used in the laboratory testing. The demonstration was conducted on PORTS diffusion cell X-25-4-2 which was one of the X-326 Building cells which was permanently shutdown as part of the Suspension of HEU Production at PORTS. The demonstration full-scale test consisted of rendering the cell leak-tight through ... continued below

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75 p.

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Riddle, R.J. September 1, 1997.

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This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 11 times . More information about this report can be viewed below.

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Description

The Long-Term, Low Temperature (LTLT) process is a gas-phase in situ decontamination technique which has been tested by LMES/K-25 personnel on the laboratory scale with promising results. The purpose of the Gas-Phase Decontamination Demonstration at PORTS was to evaluate the LTLT process on an actual diffusion cascade cell at conditions similar to those used in the laboratory testing. The demonstration was conducted on PORTS diffusion cell X-25-4-2 which was one of the X-326 Building cells which was permanently shutdown as part of the Suspension of HEU Production at PORTS. The demonstration full-scale test consisted of rendering the cell leak-tight through the installation of Dresser seals onto the process seals, exposing the cell to the oxidants ClF{sub 3} and F{sub 2} for a period of 105 days and evaluating the effect of the clean-up treatment on cell samples and coupons representing the major diffusion cascade materials of construction. The results were extrapolated to determine the effectiveness of LTLT decontamination over the range of historical uranium isotope assays present in the diffusion complex. It was determined that acceptable surface contamination levels could be obtained in all of the equipment in the lower assay cascades which represents the bulk of the equipment contained in the diffusion complex.

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75 p.

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INIS; OSTI as DE98002715

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  • Other Information: PBD: Sep 1997

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  • Other: DE98002715
  • Report No.: POEF-LMUS--111
  • Grant Number: AC05-76OR00001
  • DOI: 10.2172/573109 | External Link
  • Office of Scientific & Technical Information Report Number: 573109
  • Archival Resource Key: ark:/67531/metadc695096

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  • September 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Dec. 7, 2015, 4:32 p.m.

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Riddle, R.J. Gas-phase decontamination demonstration on PORTS cell X-25-4-2. Final technology status report, report, September 1, 1997; United States. (digital.library.unt.edu/ark:/67531/metadc695096/: accessed August 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.