Lenna Mahoney

Pacific Northwest National Laboratory
PO Box 999
Richland, WA 99352
lenna.mahoney@pnnl.gov

Biography

Ms. Mahoney joined Battelle in 1989. Her responsibilities have included salt solubility modeling to support waste retrieval, determination of the inventories of flammable gases in Hanford tank waste, design studies of fluid mixing in waste tanks, and nuclear facility safety studies. Her academic training focused on heat and mass transfer in porous media; her thesis project was a computer model of hydrogen absorption and desorption from a bed of metal hydride powder. Before joining Battelle, Ms. Mahoney spent five years analyzing the impacts of electric power utilities, industrial facilities, and urban air quality management programs on ambient concentrations of ozone, other criteria pollutants, and toxic chemicals. At Battelle, her work has centered on characterizing tank waste, modeling the behavior of particle-fluid systems, and estimating the radioactive and hazardous releases from nuclear facilities during accidents and planned operations.

Education and Credentials

B.S., Chemical Engineering, San Jose State University, 1977
M.S., Chemical Engineering, University of California, Davis, 1984
P.E., License, Chemical Engineering, State of Washington, 1996

Selected Publications

2012

Mahoney LA, PA Gauglitz, J Blanchard, ML Kimura, and DE Kurath. 2012. Small-Scale Spray Releases: Orifice Plugging Test Results. PNNL-21361, Pacific Northwest National Laboratory, Richland, WA.
Mahoney LA, PA Gauglitz, ML Kimura, GN Brown, DE Kurath, WC Buchmiller, DM Smith, J Blanchard, C Song, RC Daniel, BE Wells, DN Tran, and CA Burns. 2012. Small-Scale Spray Releases: Initial Aerosol Test Results. PNNL-21367, Pacific Northwest National Laboratory, Richland, WA.

2011

Wells BE, DE Kurath, LA Mahoney, Y Onishi, JL Huckaby, SK Cooley, CA Burns, EC Buck, JM Tingey, RC Daniel, and KK Anderson. 2011. Hanford Waste Physical and Rheological Properties: Data and Gaps. PNNL-20646, Pacific Northwest National Laboratory, Richland, WA.
Gauglitz PA, LA Mahoney, J Blanchard, and JA Bamberger. 2011. Surface Tension Estimates for Droplet Formation in Slurries with Low Concentrations of Hydrophobic Particles, Polymer Flocculants or Surface-Active Contaminants. PNNL-20466, Pacific Northwest National Laboratory, Richland, WA.
Mahoney LA, D Neiner, RA Peterson, BM Rapko, RL Russell, and PP Schonewill. 2011. Alternative Sodium Recovery Technology�High Hydroxide Leaching: FY10 Status Report. PNNL-20166, Pacific Northwest National Laboratory, Richland, WA.
Mahoney LA, BM Rapko, and PP Schonewill. 2011. "Modeling the Sodium Recovery Resulting from Using Concentrated Caustic for Boehmite Dissolution." Industrial and Engineering Chemistry Research 50(20):11570-11575. doi:10.1021/ie2008289

2010

Wells BE, RL Russell, LA Mahoney, GN Brown, DE Rinehart, WC Buchmiller, EC Golovich, and JV Crum. 2010. Hanford Sludge Simulant Selection for Soil Mechanics Property Measurement. PNNL-19250, Pacific Northwest National Laboratory, Richland, WA.
Kurath DE, RC Daniel, DL Baldwin, BM Rapko, SM Barnes, RA Gilbert, LA Mahoney, and JL Huckaby. 2010. "Process Testing Results and Scaling for the Hanford Waste Treatment and Immobilization Plant (WTP) Pretreatment Engineering Platform - 10173." In 36th Annual Radioactive Waste Management Symposium (WM 2010), March 7-11, 2010, Phoenix, AZ, vol. 5, pp. 3762-3776. Waste Management Symposia, Inc., Tucson, AZ.
Mahoney LA, SD Rassat, PW Eslinger, RL Aaberg, PM Aker, EC Golovich, BD Hanson, TS Hausmann, JL Huckaby, DE Kurath, MJ Minette, SK Sundaram, and ST Yokuda. 2010. EFRT M-12 Issue Resolution: Caustic-Leach Rate Constants from PEP and Laboratory-Scale Tests. PNNL-18502 Rev 1; WTP-RPT-186 Rev 1, Pacific Northwest National Laboratory, Richland, WA.
Recknagle KP, EM Ryan, BJ Koeppel, LA Mahoney, and MA Khaleel. 2010. "Modeling of Electrochemistry and Steam-Methane Reforming Performance for Simulating Pressurized Solid Oxide Fuel Cell Stacks." Journal of Power Sources 195(19):6637-6644.
Recknagle KP, EM Ryan, BJ Koeppel, LA Mahoney, and MA Khaleel. 2010. "Modeling of Electrochemistry and Steam-Methane Reforming Performance for Simulating Pressurized Solid Oxide Fuel Cell Stacks." Journal of Power Sources 195(19):6637-6644. doi:10.1016/j.jpowsour.2010.04.024

2009

Kurath DE, BD Hanson, MJ Minette, DL Baldwin, BM Rapko, LA Mahoney, PP Schonewill, RC Daniel, PW Eslinger, JL Huckaby, JM Billing, PS Sundar, GB Josephson, JJ Toth, ST Yokuda, EBK Baer, SM Barnes, EC Golovich, SD Rassat, CF Brown, JGH Geeting, GJ Sevigny, AJ Casella, JR Bontha, RL Aaberg, PM Aker, CE Guzman-Leong, ML Kimura, SK Sundaram, RP Pires, BE Wells, and OP Bredt. 2009. Pretreatment Engineering Platform Phase 1 Final Test Report. PNNL-18894; WTP-RPT-197 Rev 0, Pacific Northwest National Laboratory, Richland, WA.
Mahoney LA, SD Rassat, PW Eslinger, RL Aaberg, PM Aker, EC Golovich, BD Hanson, TS Hausmann, JL Huckaby, DE Kurath, MJ Minette, SK Sundaram, and ST Yokuda. 2009. EFRT M-12 Issue Resolution: Caustic Leach Rate Constants from PEP and Laboratory-Scale Tests. PNNL-18502, Pacific Northwest National Laboratory, Richland, WA.

2008

Mahoney LA, JM Alzheimer, ST Arm, CE Guzman-Leong, LK Jagoda, CW Stewart, BE Wells, and ST Yokuda. 2008. "Large-Scale Testing of Effects of Anti-Foam Agent on Gas Holdup in Process Vessels in the Hanford Waste Treatment Plant - 8280." In Waste Management 2008 HLW, TRU, LLW/ILW, Mixed, Hazardous Wastes & Environmental Management. Arizona Board of Regents, Tucson, AZ.
Poloski AP, BE Wells, LA Mahoney, RC Daniel, JM Tingey, and SK Cooley. 2008. "Effects of Sludge Particle Size and Density on Hanford Waste Processing." In Waste Management '08: Phoenix Rising: Moving Forward in Waste Management, p. Paper No. 8347. WM Symposium, Inc., Tucson, AZ.
Stewart CW, CE Guzman-Leong, ST Arm, MG Butcher, EC Golovich, LK Jagoda, WR Park, RW Slaugh, YF Su, CF Wend, LA Mahoney, JM Alzheimer, JA Bailey, SK Cooley, DE Hurley, CD Johnson, LD Reid, HD Smith, BE Wells, and ST Yokuda. 2008. Results of Large-Scale Testing on Effects of Anti-Foam Agent on Gas Retention and Release. PNNL-17170, Pacific Northwest National Laboratory, Richland, WA.

2007

Poloski AP, BE Wells, JM Tingey, LA Mahoney, MN Hall, SL Thomson, GL Smith, ME Johnson, JE Meacham, MA Knight, MG Thien, JJ Davis, and Y Onishi. 2007. Estimate of Hanford Waste Rheology and Settling Behavior. PNNL-16857, Pacific Northwest National Laboratory, Richland, WA.
Schmitt BE, LA Mahoney, and GW Ryan. 2007. "Estimating Maximum Droplet Size that can Evaporate to a Respirable Size Droplet." In 17th Annual Safety Analysis Working Group (SAWG) Workshop, May 19-24, 2007, Idaho Falls, Idaho. Energy Facility Contractors Group, Alexandria, VA.

2006

Mahoney LA. 2006. Potential Waste Tank Headspace Concentrations of DDE and 1-Naphthylamine. PNNL-15632, Pacific Northwest National Laboratory, Richland, WA.
Mahoney LA. 2006. Assessment of New Calculation Method for Toxicological Sums-of-Fractions for Hanford Tank Wastes. PNNL-16067, Pacific Northwest National Laboratory, Richland, WA.
Mahoney LA. 2006. Assessment of New Calculation Method for Toxicological Sums-of-Fractions for Hanford Tank Farm Wastes. PNNL-16067 Rev. 1, Pacific Northwest National Laboratory, Richland, WA.

2005

Mahoney LA, and JD Vienna. 2005. Feed Variability and Bulk Vitrification Glass Performance Assessment. PNNL-14985 Rev.0, Pacific Northwest National Laboratory, Richland, WA.
Stewart CW, MS Fountain, JL Huckaby, LA Mahoney, PA Meyer, and BE Wells. 2005. Effects of Globally Waste Disturbing Activities on Gas Generation, Retention, and Release in Hanford Waste Tanks. PNNL-13781 Rev. 3, Pacific Northwest National Laboratory, Richland, WA.

2004

Huckaby JL, LA Mahoney, JG Droppo, Jr, and JE Meacham. 2004. Overview of Hanford Site High-Level Waste Tank Gas and Vapor Dynamics . PNNL-14831, Pacific Northwest National Laboratory, Richland, WA.

2003

Rassat SD, LA Mahoney, RL Russell, SA Bryan, and RL Sell. 2003. Cold Dissolved Saltcake Waste Simulant Development, Preparation, and Analysis. PNNL-14194, Pacific Northwest National Laboratory, Richland, WA.
Rassat SD, LA Mahoney, RL Russell, SA Bryan, and RL Sell. 2003. Cold Dissolved Saltcake Waste Simulant Development, Preparation, and Analysis. PNNL-14194 Rev. 1, Pacific Northwest National Laboratory, Richland, WA.
Onishi Y, DS Trent, BE Wells, and LA Mahoney. 2003. Assessment of Tank 241-S-112 Liquid Waste Mixing in Tank 241-SY-101 . PNNL-14399, Pacific Northwest National Laboratory, Richland, WA.
Rassat SD, LA Mahoney, BE Wells, DP Mendoza, and DD Caldwell. 2003. Assessment of Physical Properties of Transuranic Waste in Hanford Single-Shell Tanks. PNNL-14221, Pacific Northwest National Laboratory, Richland, WA.
Rassat SD, LM Bagaasen, LA Mahoney, RL Russell, DD Caldwell, and DP Mendoza. 2003. Physical and Liquid Chemical Simulant Formulations for Transuranic Waste in Hanford Single-Shell Tanks. PNNL-14333, Pacific Northwest National Laboratory, Richland, WA.

2002

Mahoney LA, and CW Stewart. 2002. Review of the Technical Basis of the Hydrogen Control Limit for Operations in Hanford Tank Farms. PNNL-13933 Rev. 1, Pacific Northwest National Laboratory, Richland, WA.
Wells BE, JM Cuta, SA Hartley, LA Mahoney, PA Meyer, and CW Stewart. 2002. Analysis of Induced Gas Released During Retrieval of Hanford Double-Shell Tank Waste. PNNL-13782, Pacific Northwest National Laboratory, Richland, WA.
Wells BE, JM Cuta, SA Hartley, LA Mahoney, PA Meyer, and CW Stewart. 2002. Analysis of Induced Gas Releases During Retrieval of Hanford Double-Shell Tank Waste. PNNL-13782 Rev. 1, Pacific Northwest National Laboratory, Richland, WA.

2000

Mahoney LA. 2000. Ammonia Results Review for Retained Gas Sampling . PNNL-13317, Pacific Northwest National Laboratory, Richland, WA.
Mahoney LA, JL Huckaby, SA Bryan, and GD Johnson. 2000. Overview of the Flammability of Gases Generated in Hanford Waste Tanks. PNNL-13269, Pacific Northwest National Laboratory, Richland, WA.
Stewart CW, LA Mahoney, and WB Barton. 2000. Analysis of Several Hazardous Conditions for Large Transfer and Back-Dilution Sequences in Tank 241-SY-101. PNNL-13118, Pacific Northwest National Laboratory, Richland, WA.

1999

Mahoney LA, ZI Antoniak, JM Bates, and ME Dahl. 1999. Retained Gas Sampling Results for the Flammable Gas Program. PNNL-13000, Pacific Northwest National Laboratory, Richland, WA.
Rassat SD, PA Gauglitz, SM Caley, LA Mahoney, and DP Mendoza. 1999. A Discussion of SY-101 Crust Gas Retention and Release Mechanisms. PNNL-12092, Pacific Northwest National Laboratory, Richland, WA.