Application of Wald's sequential probability ratio test to nuclear materials control

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We have replaced traditional analysis methods for nuclear material control monitoring with hypothesis testing, specifically with Wald's sequential-probability-ratio test. Our evaluation of Walds'd method, applied in both vehicle and pedestrian SNM monitors, is by Monte Carlo calculation to determine the alarm probability and average monitoring times of the monitors. The vehicle monitor with Wald's test has a much shorter monitoring delay than with traditional methods, without serious compensating changes in operating characteristics. The pedestrian monitor with Wald's method also has advantages over traditional single-interval test, in that the Wald method duplicates the advantages of a moving-average technique. We verified the ... continued below

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Pages: 18

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Fehlau, P.E.; Coop, K.L. & Markin, J.T. January 1, 1984.

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Description

We have replaced traditional analysis methods for nuclear material control monitoring with hypothesis testing, specifically with Wald's sequential-probability-ratio test. Our evaluation of Walds'd method, applied in both vehicle and pedestrian SNM monitors, is by Monte Carlo calculation to determine the alarm probability and average monitoring times of the monitors. The vehicle monitor with Wald's test has a much shorter monitoring delay than with traditional methods, without serious compensating changes in operating characteristics. The pedestrian monitor with Wald's method also has advantages over traditional single-interval test, in that the Wald method duplicates the advantages of a moving-average technique. We verified the Monte Carlo calculations for the pedestrian monitor by means of a special program for the monitor's microprocessor controller. The observations of false-alarm probability and average monitoring time for over 500,000 tests verified the Monte Carlo results.

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Pages: 18

Notes

NTIS, PC A02/MF A01; 1.

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  • ESARDA specialists meeting, Ispra, Italy, 10 Sep 1984

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  • Other: DE85002017
  • Report No.: LA-UR-84-2782
  • Report No.: CONF-8409170-1
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 6154216
  • Archival Resource Key: ark:/67531/metadc1112702

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Office of Scientific & Technical Information Technical Reports

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  • January 1, 1984

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  • Feb. 22, 2018, 7:45 p.m.

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  • May 21, 2018, 7 p.m.

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Fehlau, P.E.; Coop, K.L. & Markin, J.T. Application of Wald's sequential probability ratio test to nuclear materials control, article, January 1, 1984; New Mexico. (digital.library.unt.edu/ark:/67531/metadc1112702/: accessed October 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.