Review of Statistical Analyses Resulting from Performance of HLDWD- DWPF-005

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The Engineering Department at the Defense Waste Processing Facility (DWPF) has reviewed two reports from the Statistical Consulting Section (SCS) involving the statistical analysis of test results for analysis of small sample inserts (references 1{ampersand}2). The test results cover two proposed analytical methods, a room temperature hydrofluoric acid preparation (Cold Chem) and a sodium peroxide/sodium hydroxide fusion modified for insert samples (Modified Fusion). The reports support implementation of the proposed small sample containers and analytical methods at DWPF. Hydragard sampler valve performance was typical of previous results (reference 3). Using an element from each major feed stream. lithium from the ... continued below

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17 p.

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Beck, R.S. September 29, 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. More information about this report can be viewed below.

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  • Beck, R.S. Westinghouse Savannah River Company, AIKEN, SC (United States)

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Description

The Engineering Department at the Defense Waste Processing Facility (DWPF) has reviewed two reports from the Statistical Consulting Section (SCS) involving the statistical analysis of test results for analysis of small sample inserts (references 1{ampersand}2). The test results cover two proposed analytical methods, a room temperature hydrofluoric acid preparation (Cold Chem) and a sodium peroxide/sodium hydroxide fusion modified for insert samples (Modified Fusion). The reports support implementation of the proposed small sample containers and analytical methods at DWPF. Hydragard sampler valve performance was typical of previous results (reference 3). Using an element from each major feed stream. lithium from the frit and iron from the sludge, the sampler was determined to deliver a uniform mixture in either sample container.The lithium to iron ratios were equivalent for the standard 15 ml vial and the 3 ml insert.The proposed method provide equivalent analyses as compared to the current methods. The biases associated with the proposed methods on a vitrified basis are less than 5% for major elements. The sum of oxides for the proposed method compares favorably with the sum of oxides for the conventional methods. However, the average sum of oxides for the Cold Chem method was 94.3% which is below the minimum required recovery of 95%. Both proposed methods, cold Chem and Modified Fusion, will be required at first to provide an accurate analysis which will routinely meet the 95% and 105% average sum of oxides limit for Product Composition Control System (PCCS).Issued to be resolved during phased implementation are as follows: (1) Determine calcine/vitrification factor for radioactive feed; (2) Evaluate covariance matrix change against process operating ranges to determine optimum sample size; (3) Evaluate sources for low sum of oxides; and (4) Improve remote operability of production versions of equipment and instruments for installation in 221-S.The specifics of the review and the effort necessary to address the items for phased implementation of the analytical method changes are described in this report.

Physical Description

17 p.

Notes

INIS; OSTI as DE98052038

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  • Other Information: PBD: 29 Sep 1997

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  • Other: DE98052038
  • Report No.: WSRC-RP--97-00883
  • Grant Number: AC09-96SR18500
  • DOI: 10.2172/594302 | External Link
  • Office of Scientific & Technical Information Report Number: 594302
  • Archival Resource Key: ark:/67531/metadc693536

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  • September 29, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Feb. 9, 2016, 8:57 p.m.

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Beck, R.S. Review of Statistical Analyses Resulting from Performance of HLDWD- DWPF-005, report, September 29, 1997; Aiken, South Carolina. (digital.library.unt.edu/ark:/67531/metadc693536/: accessed September 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.