Über die Sintergeschwindigkeit von Urandioxidpulver unter oxidierenden und reduzierenden Bedingungen und Folgerungen über die Spaltedelgasabgabe (Edelgasdiffusion in Festkörpern 16)

  • P. Möller
  • K. Wagener

Summary

When testing nuclear fuel containing uranium by Post-Activation-Diffusion-(PAD)-measurements, the neutron-irradiated samples are usually annealed either in a vacuum or an inert gas atmosphere. By this treatment measurable quantities of fission rare gases can be obtained. During this procedure, the uranium dioxide samples usually are not in equilibrium with the oxygen partial pressure. Therefore they are oxidized or reduced, respectively, depending on the test conditions. Thermo­gravimetric tests and specific surface measurements on uranium dioxide powder indicate that during a change of the oxygen/ura­nium ratio, the sintering is markedly accelerated. This fact leads to the hypothesis that increased mobility of the lattice ions accelerates the release of the rare gas. In this way the bursts in the rare gas release—often observed in PAD-measurements—can be interpreted.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Literatur

  1. [1]
    Felix, F.: Nukleonik 1, 66–67 (1958).Google Scholar
  2. [2]
    Barnes, R. H., M. Kangilasri, J.B. Melehan, and F. A. Rough: BMI-1533, 1961.Google Scholar
  3. [3]
    Stevens, W.H., J. R. MAC Ewan, A.M. Ross: T1D-7610, 7–22, 1960.Google Scholar
  4. [4]
    Rothwell, E.: J. Nucl. Mater. 5, 241–249 (1962).Google Scholar
  5. [5]
    Carroll, R.M.: Am. Soc. Testing Mater. 1961, p. 110–120.Google Scholar
  6. [6]
    Carroll, R.M.: Nucl. Safety 4, No. 1, 35–42 (1962).Google Scholar
  7. [7]
    Carroll, R.M.: ORNL-3166, 1961.Google Scholar
  8. [8]
    Lagerwall, T., and P. Schmeling: HMI-B 27, 1963.Google Scholar
  9. [9]
    Brunauer, S., P.H. Emmett, and E. Teller: J Am. Chem. Soc. 60, 309–319 (1938).Google Scholar
  10. [10]
    Pickering, H.L., and H.C. Eckstrom: J. Am. Chem. Soc. 74, 4775–7 (1952).Google Scholar
  11. [11]
    Clayton, J.C., and S. Aronson: WAPD-178, Dec. 1958.Google Scholar
  12. [12]
    Steer, S.: Reaktorwerkstoff e. Diskussionstagg. 9. u. 10. Dez. 1963, Stuttgart. Köln: Deut. Ges. Metallk. 1963.Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1965

Authors and Affiliations

  • P. Möller
    • 1
  • K. Wagener
    • 1
  1. 1.Sektor KernchemieHahn-Meitner-Institut für Kernforschung Berlin1 Berlin 39Deutschland

Personalised recommendations