Online, real-time analysis of highly complex processing streams: Quantification of analytes in Hanford tank sample

Journal Article · Wed Nov 27 04:00:00 EST 2019 · Industrial and Engineering Chemistry Research

DOI:https://doi.org/10.1021/acs.iecr.9b03636· OSTI ID:1593326

Lines, Amanda M. ^[1]; Tse, Po Ki ^[1]; Felmy, Heather M. ^[1]; Wilson, Jennifer M. ^[1]; Shafer, Jenifer C. ^[2]; Denslow, Kayte M. ^[1]; Still, A N. ^[2]; King, C ^[2]; Bryan, Samuel A. ^[1]

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1. BATTELLE (PACIFIC NW LAB)
2. Colorado School Of Mines

Processing of hazardous materials is a crucial example of where on-line monitoring can significantly reduce operation risk, cost, and time. This is particularly true in the case of the Hanford site, where nuclear materials from the cold war era are being processed for environmental cleanup efforts. In exceedingly complex streams such as those at Hanford, on-line and real-time monitoring can be a challenge due to complexity of signals. Further obstacles are imposed by the caustic nature of processing streams as well as the radiation damage inflicted on instruments and probes. On-line monitoring based on Raman spectroscopy enables the detection of many Hanford tank species of interest, and was demonstrated here on nine chemical species that comprise the majority of tank waste by volume, including Al(OH)4-, C2O42-, CO32-, CrO42-, NO32-, NO3-, OH-, PO43-, SO42-. Real-time analysis of Raman signal allows for immediate quantification of target analytes and was successfully accomplished through the use of chemometric models. Furthermore, irradiation tests reveal Raman monitoring systems can effectively continue to operate even after receiving 1·107 Rad of gamma dose. The on-line, real-time monitoring system developed here was successfully used to simultaneously quantify nine target analytes in a real samples collected from Hanford tank AP-105.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1593326
• Report Number(s): PNNL-SA-143209
• Journal Information: Industrial and Engineering Chemistry Research, Journal Name: Industrial and Engineering Chemistry Research Journal Issue: 47 Vol. 58
• Country of Publication: United States
• Language: English