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Activity Number:
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77
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Type:
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Contributed
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Date/Time:
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Monday, August 12, 2002 : 8:30 AM to 10:20 AM
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Sponsor:
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Section on Physical & Engineering Sciences*
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| Abstract - #301444 |
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Title:
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Upper Tolerance Intervals Adjusted for Multiple Nuisance Uncertainties in a Nuclear Waste Glass Application (Part 2)
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Author(s):
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Scott Cooley*+ and Greg Piepel
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Affiliation(s):
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Battelle-Pacific Northwest Division and Battelle-Pacific Northwest Division
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Address:
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P.O. Box 999, FSD, Richland, Washington, 99352, USA
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Keywords:
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Tolerance Interval ; Nuisance Uncertainties ; Nuclear Waste Glass ; Variation
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Abstract:
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Part 1 describes an application in which X%/Y% upper tolerance intervals (UTI) will be used to demonstrate nuclear waste glass produced over a specified period of production satisfies chemical release limits. Two X%/Y% UTI formulas were developed to account for sampling, analytical, and regression model nuisance uncertainties in addition to variation over the period of production. One formula adjusts for nuisance uncertainties and the other does not. Part 2 describes using the two formulas to calculate UTI half-widths for ranges of input parameters expected to be appropriate for the WTP. The UTI half-widths obtained using the unadjusted and adjusted X%/Y% UTI formulas were compared to assess the advantages of the adjustment approach. Adjusting for nuisance uncertainties can significantly reduce the size of X%/Y% UTIs when X and Y are specified, or increase the values of X and/or Y when calculating X%/Y% UTIs equal to release limits. A simulated data set also was used to illustrate and compare the results of applying the unadjusted and adjusted X%/Y% UTI formulas.
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