Fission product release from defected LWR fuel rods

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Experiments conducted at Oak Ridge National Laboratory both with fission product simulants and with irradiated commercial fuel have been utilized to develop a semi-empirical model of fission product release from defected Light Water Reactor (LWR) fuel rods. At fuel temperatures less than 1200/sup 0/C, releases occur from fission products previously accumulated in the pellet-to-cladding gap region. In this temperature range, the release of species of moderate volatility is postulated to result from two processes. The first of these, which occurs during the period of fuel clad rupture, is due to the transport of the fill and fission product gases as ... continued below

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Pages: 16

Creation Information

Malinauskas, A.P.; Lorenz, R.A. & Collins, J.L. January 1, 1979.

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Description

Experiments conducted at Oak Ridge National Laboratory both with fission product simulants and with irradiated commercial fuel have been utilized to develop a semi-empirical model of fission product release from defected Light Water Reactor (LWR) fuel rods. At fuel temperatures less than 1200/sup 0/C, releases occur from fission products previously accumulated in the pellet-to-cladding gap region. In this temperature range, the release of species of moderate volatility is postulated to result from two processes. The first of these, which occurs during the period of fuel clad rupture, is due to the transport of the fill and fission product gases as they are vented through the cladding defect. The second mechanism for release, which is time-dependent, involves the diffusional transport of the semi-volatile species to the point of clad rupture through the interconnected voids (the pellet-to-cladding gap and cracks in fuel pellets) within the fuel rod.

Physical Description

Pages: 16

Notes

Dep. NTIS, PC A02/MF A01.

Source

  • 7. water reactor safety research information meeting, Gaithersburg, MD, USA, 5 Nov 1979

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  • Report No.: CONF-791118-8
  • Grant Number: W-7405-ENG-26
  • Office of Scientific & Technical Information Report Number: 5396181
  • Archival Resource Key: ark:/67531/metadc1070412

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • January 1, 1979

Added to The UNT Digital Library

  • Feb. 4, 2018, 10:51 a.m.

Description Last Updated

  • March 23, 2018, 4:23 p.m.

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Malinauskas, A.P.; Lorenz, R.A. & Collins, J.L. Fission product release from defected LWR fuel rods, article, January 1, 1979; Tennessee. (digital.library.unt.edu/ark:/67531/metadc1070412/: accessed April 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.