Analysis of Contaminated Nuclear Plant Steel by Laser-Induced Breakdown Spectroscopy

Publication date: Available online 7 November 2017
Source:Journal of Hazardous Materials
Author(s): Adam Lang, Dirk Engelberg, Nicholas T. Smith, Divyesh Trivedi, Owen Horsfall, Anthony Banford, Philip A. Martin, Paul Coffey, William R. Bower, Clemens Walther, Martin Weiß, Hauke Bosco, Alex Jenkins, Gareth T.W. Law
Laser Induced Breakdown Spectroscopy (LIBS) has the potential to allow direct, standoff measurement of contaminants on nuclear plant. Here, LIBS is evaluated as an analytical tool for measurement of Sr and Cs contamination on type 304 stainless steel surfaces. Samples were reacted in model acidic (PUREX reprocessing) and alkaline (spent fuel ponds) Sr and Cs bearing liquors, with LIBS multi-pulse ablation also explored to measure contaminant penetration. The Sr II (407.77nm) and Cs I (894.35nm) emission lines could be separated from the bulk emission spectra, though only Sr could be reliably detected at surface loadings > 0.5mg cm⁻². Depth profiling showed decay of the Sr signal with time, but importantly, elemental analysis indicated that material expelled from LIBS craters is redistributed and may interfere in later laser shot analyses.



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