2009•OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information)Requires access
Elemental analysis of simulated crud by using a laser induced breakdown spectroscopy: a feasibility study
Jei‐Won Yeon, E.C. Jung, Sung-Mi Jung, Jeong Hyeon Hwang, Kunpeng Song
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Abstract
In nuclear power plants, the CRUD mainly composed of Fe and Ni mixed oxides has been known to create AOA phenomena and to increase in the dose rate. To mitigate fuel CRUD formation, it is necessary to analyze the elemental composition of fuel CRUD. The LIBS offers a remote and on-site elemental analysis with little or no sample preparation. In the present study, we investigated the feasibility of analyzing an elemental composition of CRUD by using a LIBS, in order to develop a remote and on-site CRUD analysis system. First, we prepared five simulated CRUDs with different Fe/Ni ratios. Their structures and their elemental ratios were determined by using XRD patterns and ICP-AES spectra, respectively. After this, the laser induced breakdown emission spectra of these simulated CRUDs were obtained by using a 266 nm Nd:YAG laser. The Fe/Ni ratios were determined by using the intensities of the Fe emission peak at 344.388 nm and the Ni peak at 343.356 nm as an internal reference. It was confirmed that the Fe contents in the CRUD in the range between 40 and 70 atomic % could be analyzed by using the laser induced breakdown spectroscopic technique. (authors)