Kinetics of helium bubble formation in nuclear materials [electronic resource].

Published:: Washington, D.C. : United States. Dept. of Energy, 2005.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:: PDF-file: 25 pages; size: 0 Kbytes
Additional Creators:: Lawrence Berkeley National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

The formation and growth of helium bubbles due to self-irradiation in plutonium has been modeled by a discrete kinetic equations for the number densities of bubbles having k atoms. Analysis of these equations shows that the bubble size distribution function can be approximated by a composite of: (1) the solution of partial differential equations describing the continuum limit of the theory but corrected to take into account the effects of discreteness, and (2) a local expansion about the advancing leading edge of the distribution function in size space. Both approximations contribute to the memory term in a close integrodifferential equation for the monomer concentration of single helium atoms. The present theory is compared to the numerical solution of the full kinetic model and to previous approximation of Schaldach and Wolfer involving a truncated system of moment equations.

Report Numbers:

E 1.99:ucrl-jrnl-216899
ucrl-jrnl-216899

Subject(s):

Materials Science

Other Subject(s):

Note:

Published through SciTech Connect.
10/13/2005.
"ucrl-jrnl-216899"
Physica D 1447 FT
Neu, J C; Wolfer, W G; Bonilla, L L; Carpio, A.

Funding Information:

W-7405-ENG-48

View MARC record | catkey: 14447181