Summary of recent Raman Spectroscopy testing of SRS processes

Fondeur, F. F.¹  Lascola, R. J.¹  O'Rourke, P. E.¹ 

[1] Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)

关键词: SAVANNAH RIVER PLANT;    RADIOACTIVE WASTE PROCESSING;    RAMAN SPECTROSCOPY;    GASES;    NITRATES;    NITRIC ACID;    TANKS;    ALUMIN;   

DOI  :  10.2172/1237310
RP-ID  :  SRNL-STI--2015-00643
PID  :  OSTI ID: 1237310
Others  :  TRN: US1600302

美国|英语

来源: SciTech Connect

【 摘 要 】

This report describes several scoping projects conducted at SRNL using Raman spectroscopic methods for monitoring different aspects of nuclear waste and materials processing. One project examined the suitability of a Raman telescope for in situ measurement of solid residues in waste tanks. Characteristics evaluated for this equipment included radiation resistance, ease of use, and sensitivity. A second project monitored the nitrate content in liquid filtrate from the testing of a rotary microfilter using a fiber-based insertion probe. The third project made Raman measurements of various gases, including H₂ and NO_x, in the headspace of a vessel while dissolving aluminum coupons in nitric acid. Measurements followed the evolution of these species in real time. Although the majority of these projects occurred in the laboratory environment, SRNL has substantial experience with implementing other optical techniques into nuclear materials processing environments. The work described in this report shows the potential of the Raman technology to provide real time measurements of species such as nitrate or hydroxide during sludge washing or evolved gases such as hydrogen or NO_x during waste processing.