Clarice E Phelps

Clarice E Phelps

Researcher, Medical, Industrial, & Research Isotopes Group


Clarice Phelps serves as the program manager for the Ni-63 and Se-75 industrial use isotope programs. She is also a member of the research and development staff in the Nuclear Materials Processing Group with several years of combined experience in the processing, analyzing, recovery, and purification of transuranic isotopes. Clarice is currenlty working on research efforts in the area of actinide and lanthanide separations for medical use isotopes. 

She has previously contributed to several notable research efforts to include the purification of the Bk-249 used to help discover Z=117, spectroscopic analysis of Pu-238/ Np-237 and their valance states for the Pu-238/ NASA project, and electrodeposition work with Cf-252 for the CARIBU (Californium Rare Isotope Breeder Upgrade) Project. 

She is a member of the American Chemical Society as well as as the Educational Outreach Committee for the Nuclear Science and Engineering Directorate.


Electrodeposition of Cf-252 using Ammonium Acetate Solution

Spectrophotometric Process Monitoring for Hot Cell Mixer- Settler Separations at REDC

Spectrophotometric Valence State Studies of Pu-238 and Np-238 

Actinide and Lanthanide Separations using LN2 Resin



C.E. Phelps, R.A. Boll, C.E. Porter, "Electrodepostion of Californium-252 using Ammonium Acetate Solution", Poster Presentation for 36th Actinide Separations Conference, Chattanooga, TN (May 2012)

S.M. Van Cleve, R.A. Boll, C.E. Phelps, J.G. Ezold, "Recovery and Purification of Berkelium-249 for SHE Research", Poster Presentation for 36th Actinide Separations Conference, Chattanooga, TN (May 2012)


M.N. Torrico, R.A. Boll, M. Matos, C.E. Phelps, "Electrodeposition of Actinide Compounds from Aqueous Ammonium Acetate Matrix", Presentation for the 245th American Chemical Society National Meeting, New Orleans, LA (June 2013)

J.L. Warburton, C.E. Phelps, D. Benker, B.D. Patton, R.M. Wham, "UV-Visible Spectroscopic Process Monitor for Hot Cell Mixer-Settler Separations at ORNL's Radiochemical Engineering Development Center", Institute of Nuclear Materials Management Conference, Palm Springs, CA (2013) [Paper in conference proceedings (book, CD)]


J. McFarlane, L.H. Delmau, D.W. DePaoli, C.H. Mattus, C.E. Phelps, B.D. Roach, "Hydroxylamine Nitrate Decomposition under Non-Radiological Conditions", ORNL/ TM-2015/156, July 2015


C. Phelps, L. Delmau, R. Boll, C. Hindman, "Investigations Using LN, LN2 and LN3 resins for Separation of Actinium from Lanthanuum", Presentation for the 252nd American Chemical Society National Meeting, Philadelphis, PA (August 2016)


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