Raman based process monitor for continuous real-time analysis of high level radioactive waste components

I&EC 154

Sam Bryan1, Tatiana G. Levitskaia, tatiana.levitskaia@pnl.gov1, Sergei I. Sinkov, serguei.sinkov@pnl.gov2, Stephan N Schlahta, steve.schlahta@pnl.gov1, and Jeremy M. Shaver, shaver@eigenvector.com3. (1) Radiochemical Processing Laboratory, Pacific Northwest National Laboratory, P.O. Box 999, MS P7-25, Richland, WA 99352, (2) Radiochemical Processing Group, Battelle Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352, (3) Technology Development, Eigenvector Research, Inc, P.O. Box 561, Manson, WA 98831
A new monitoring system, developed by Pacific Northwest National Laboratory (PNNL) researchers features on-line Raman spectroscopy to quickly generate real-time data/analysis to facilitate a timely response to the dynamic characteristics of a radioactive high level waste stream. The model based on Raman spectroscopy is capable of simultaneously and continuously quantifying the levels of all the chemically significant anions within the waste; nitrate, nitrite, phosphate, carbonate, chromate, hydroxide, sulfate, and aluminate. The total sodium ion concentration was also determined independently by modeling inputs from on-line conductivity and density meters.

The components and analytical tools of the new process monitor can be tailored for a variety of complex mixtures in chemically harsh environments, such as pulp and paper processing liquids, electroplating solutions, and radioactive tank wastes.

Details of the monitoring system, chemometric modeling, and acceptance testing will be discussed.

 

In Situ Spectroscopic Monitoring in Process Development and Production, Sponsored by Novel Chemistry with Industrial Applications Sub-Division
8:30 AM-12:00 PM, Wednesday, 13 September 2006 Moscone Center -- Room 252/254, Oral

Division of Industrial & Engineering Chemistry

The 232nd ACS National Meeting, San Francisco, CA, September 10-14, 2006