期刊
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
卷 65, 期 11, 页码 918-926出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.sab.2010.09.001
关键词
Femto-LIBS; Silver; Zirconium oxide; Silicon carbide; Uranium dioxide; TRISO fuel coated particles
类别
The detection of metallic silver on Chemical Vapour Deposited (CVD) grown silicon carbide and in Pebble Bed Modular Reactor (PBMR) supplied tri-structural isotropic (TRISO) coated particles (with 500 mu m diameter zirconium oxide surrogate kernel) has been studied with femtosecond Laser Induced Breakdown Spectroscopy (femto-LIBS). The SiC layer of the TRISO coated particle is the main barrier to metallic and gaseous fission products of which (110m)Ag is of particular interest for direct cycle high temperature reactors. This work is a feasibility study for diagnosing and profiling silver transport through the silicon carbide layer of fuel particles for a high temperature gas reactor in out-of-reactor experimentation. The zirconium oxide is a surrogate for the enriched uranium oxide fuel. The conclusion reached in this study was that femto-LIBS can achieve good surface spatial resolution and good depth resolution for studies of silver in experimental coated particles. The LIBS technique also offers a good alternative for a remote analytical technique. (C) 2010 Elsevier B.V. All rights reserved.
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