Automated uranium analysis by delayed-neutron counting

H. Kunzendorf, L. Løvborg, E.M. Christiansen

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    Abstract

    Automated uranium analysis by fission-induced delayed neutron counting is described. A short description is given of the instrumentation including transfer system, process control, irradiation and counting sites, and computer operations. Characteristic parameters of the facility (sample preparations), background, and standards) are discussed. A sensitivity of 817 ± 22 counts per 10-6g U is found using irradiation, delay, and counting times of 20 s, 5s , and 10 s, respectively. Presicion is generally less than 1% for normal geological samples. Critical level and detection limits for 1.o g samples are 8 and 16 ppb, respectively. The importance of some physical and elemental interferences are outlined. Dead-time corrections of measured count ratos are necessary and a polynomical expression is used for count rates up to 105. The presence of rare earth elements is regarded as the most important elemental interference. A typical application is given and other areas of application are described.
    Original languageEnglish
    Place of PublicationRoskilde
    PublisherRisø National Laboratory
    Number of pages38
    ISBN (Print)87-550-0709-0
    Publication statusPublished - 1980
    SeriesDenmark. Forskningscenter Risoe. Risoe-R
    Number429
    ISSN0106-2840

    Keywords

    • Risø-R-429

    Cite this

    Kunzendorf, H., Løvborg, L., & Christiansen, E. M. (1980). Automated uranium analysis by delayed-neutron counting. Risø National Laboratory. Denmark. Forskningscenter Risoe. Risoe-R, No. 429