PNNL

Dr. Heather Felmy is a chemist focused on developing online monitoring tools for nuclear applications. She is involved in several projects designing and testing sensors used to measure target analytes in aqueous systems, gas phases, and molten salts for nuclear material processing applications.

Felmy’s work involves developing chemometric models, built from optical spectroscopy data, to allow for real-time monitoring of processes. These online monitoring capabilities can allow researchers, engineers, and operators to monitor systems in real time and make changes that allow for safe and effective operations. These tools are applicable to molten salt reactor technologies, used nuclear fuel recycling, and the cleanup of legacy waste.

• Online monitoring
• Optical spectroscopy
• Electrochemistry
• Spectroelectrochemistry
• Chemometric analysis

• PhD in Chemistry, Washington State University
• BS in Chemistry, University of Washington

• American Chemical Society, Member
• Go Team Therapy, Crisis, and Airport Dogs, Member

2022

• Felmy, H.M., H.E. Lackey, A. Schafer Medina, M.J. Minette, S.A. Bryan, and A.M. Lines. 2022. “Leveraging multiple Raman excitation wavelength systems for process monitoring of nuclear waste streams.” ACS ES&T Water 2(3):465-473. PNNL-SA-166535. doi:10.1021/acsestwater.1c00408

2021

• Felmy, H.M., A.J. Clifford, A. Schafer Medina, R.M. Cox, J.M. Wilson, A.M. Lines, and S.A. Bryan. 2021. “On-Line Monitoring of Gas-Phase Molecular Iodine Using Raman and Fluorescence Spectroscopy Paired with Chemometric Analysis.” Environmental Science & Technology 55 (6):3898–3908. doi: 10.1021/acs.est.0c06137
• Lackey, H.E., H.A. Colburn, M.V. Olarte, T. Lemmon, H.M. Felmy, S.A. Bryan, and A.M. Lines. 2021. “On-Line Raman Measurement of the Radiation-Enhanced Reaction of Cellobiose with Hydrogen Peroxide.” ACS omega. 6(51):35457–35466. doi: 10.1021/acsomega.1c04852
• Andrews, H., J. Mcfarlane, S. Chapel, D.D. Bull Ezell, D.E. Holcomb, D. de Wet, M.S. Greenwood, K.G. Myhre, S.A. Bryan, A. Lines, B.J. Riley, H.M. Felmy, and P.W. Humrickhouse. 2021. "Review of Molten Salt Reactor Off-Gas Management Considerations." Nuclear Engineering and Design 385(December 2021):111529. doi:10.1016/j.nucengdes.2021.111529

2020

• Nelson, G.L., H.E. Lackey, J.M. Bello, H.M. Felmy, H.B. Bryan, F. Lamadie, S.A. Bryan, and A.M. Lines. 2020. “Enabling Microscale Processing: Combined Raman and Absorbance Spectroscopy for Microfluidic On-Line Monitoring.” Analytical Chemistry, 93(3):1643-1651. doi: 10.1021/acs.analchem.0c04225
• Hughey, K.D., A.M. Bradley, R.G. Tonkyn, H.M. Felmy, T.A. Blake, S.A. Bryan, T.J. Johnson, and A.M. Lines. 2020. “Absolute Band Intensity of the Iodine Monochloride Fundamental Mode for Infrared Sensing and Quantitative Analysis.” The journal of physical chemistry. 124(46):9578–9588. doi: 10.1021/acs.jpca.0c07353

2019

• Lines, A.M., P. Tse, H.M. Felmy, J.M. Wilson, J.C. Shafer, K.M. Denslow, and A.N. Still, et al. 2019. "Online, real-time analysis of highly complex processing streams: Quantification of analytes in Hanford tank sample." Industrial and Engineering Chemistry Research 58(47):21194-21200. doi:10.1021/acs.iecr.9b03636

2017

• Felmy, H.M., K.T. Bennett, and S.B. Clark. 2017. “The impact of mixed solvents on the complexation thermodynamics of Eu(III) by simple carboxylate and amino carboxylate ligands” The Journal of Chemical Thermodynamics, 114:83-92. doi.org/10.1016/j.jct.2017.05.003