Raman Based Process Monitor For Continuous Real-Time Analysis Of High Level Radioactive Waste Components
ABSTRACT A new monitoring system was developed at Pacific Northwest National Laboratory (PNNL) to quickly generate real-time data/analysis to facilitate a timely response to the dynamic characteristics of a radioactive high level waste stream. The developed process monitor features Raman and Coriolis/conductivity instrumentation configured for the remote monitoring, MatLab-based chemometric data processing, and comprehensive software for data acquisition/storage/archiving/display. The monitoring system is capable of simultaneously and continuously quantifying the levels of all the chemically significant anions within the waste stream including 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. In addition to the chemical information, this monitoring system provides immediate real-time data on the flow parameters, such as flow rate and temperature, and cumulative mass/volume of the retrieved waste stream. 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. The developed monitoring system was tested for acceptability before it was deployed for use in Hanford Tank S-109 retrieval activities. The acceptance tests included performance inspection of hardware, software, and chemometric data analysis to determine the expected measurement accuracy for the different chemical species that are encountered during S-109 retrieval.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1013951
- Report Number(s):
- PNNL-SA-58302; 830403000; TRN: US1102573
- Resource Relation:
- Conference: Waste Management 2008 Conference (WM2008): Phoenix Rising: Moving Forward in Waste Management, February 24-29, 2008, Phoenix, AZ, Paper No. 8263
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ACCURACY
ANIONS
DATA ANALYSIS
DATA PROCESSING
ELECTROPLATING
FLOW RATE
MIXTURES
MONITORING
MONITORS
PERFORMANCE
PROCESSING
RADIOACTIVE WASTES
SIMULATION
SODIUM IONS
TANKS
WASTE MANAGEMENT
WASTES
process monitoring
Raman spectroscopy
conductivity
density
radioactive ligh level waste
Hanford waste