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Lenna Mahoney

Pacific Northwest National Laboratory
PO Box 999
Richland, WA 99352

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

PNNL Publications

2018

  • Colburn H.A., S.A. Bryan, D.M. Camaioni, L.A. Mahoney, and S.R. Adami. 2018. Gas Generation Testing of Spherical Resorcinol-Formaldehyde (sRF) Resin. PNNL-26869 Rev. 0. Richland, WA: Pacific Northwest National Laboratory.

2017

  • Bowyer T.W., C.J. Gesh, D.A. Haas, J.C. Hayes, J.M. Johns, C.D. Lukins, and L.A. Mahoney, et al. 2017. Estimation of Plutonium-240 Mass in Waste Tanks Using Ultra-Sensitive Detection of Radioactive Xenon Isotopes from Spontaneous Fission. PNNL-26495. Richland, WA: Pacific Northwest National Laboratory.

2016

  • Pease L.F., J.A. Bamberger, L.A. Mahoney, S.T. Yokuda, and M.J. Minette. 2016. "A Simple Criterion to Estimate Performance of Pulse Jet Mixed Vessels." In Proceedings of the ASME 2016 Fluids Engineering Division Summer Meeting FEDSM2016 July 10-14, 2016, Washington, DC, 1B, V01BT24A004, FEDSM2016-7751. New York, New York:American Society of Mechanical Engineers. PNNL-SA-116485. doi:10.1115/FEDSM2016-7751

2015

  • Bowyer T.W., C.J. Gesh, D.A. Haas, J.C. Hayes, L.A. Mahoney, J.E. Meacham, and D.P. Mendoza, et al. 2015. Estimation of 240Pu Mass in a Waste Tank Using Ultra-Sensitive Detection of Radioactive Xenon Isotopes from Spontaneous Fission. PNNL-24355. Richland, WA: Pacific Northwest National Laboratory.
  • Gauglitz P.A., J.R. Bontha, R.C. Daniel, L.A. Mahoney, S.D. Rassat, B.E. Wells, and J. Bao, et al. 2015. Hydrogen Gas Retention and Release from WTP Vessels: Summary of Preliminary Studies. PNNL-24255. Richland, WA: Pacific Northwest National Laboratory.
  • Mahoney L.A. 2015. Self-Flammability of Gases Generated by Hanford Tank Waste and the Potential of Nitrogen Inerting to Eliminate Flammability Safety Concerns. PNNL-24194 Rev. 1. Richland, WA: Pacific Northwest National Laboratory.

2014

  • Rassat S.D., P.A. Gauglitz, L.A. Mahoney, R.P. Pires, D.R. Rector, J.A. Fort, and G.K. Boeringa, et al. 2014. Gas Release Due to Rayleigh-Taylor Instability Within Sediment Layers in Hanford Double-Shell Tanks: Results of Scaled Vessel Experiments, Modeling, and Extrapolation to Full Scale. PNNL-23060 Rev. 1; DSGREP-RPT-002, Rev.1. Richland, WA: Pacific Northwest National Laboratory.

2013

  • Bontha J.R., P.A. Gauglitz, D.E. Kurath, H.E. Adkins, C.W. Enderlin, J. Blanchard, and R.C. Daniel, et al. 2013. "Experimental Challenges and Successes in Measuring Aerosol Concentrations at Prototypic Spray Conditions Encountered at the Hanford Waste Treatment and Immobilization Plant - 13327." In Waste Management Symposia (WM2013): International Collaboration and Continuous Improvement, February 24-28, 2013, Phoenix, Arizona. Tempe, Arizona:WM Symposia. PNNL-SA-92681.
  • Daniel R.C., P.A. Gauglitz, C.A. Burns, M.S. Fountain, R.W. Shimskey, J.M. Billing, and J.R. Bontha, et al. 2013. Large-Scale Spray Releases: Additional Aerosol Test Results. PNNL-22415; WTP-RPT-221 Rev.0. Richland, WA: Pacific Northwest National Laboratory.
  • Gauglitz P.A., L.A. Mahoney, P.P. Schonewill, J.R. Bontha, J. Blanchard, D.E. Kurath, and R.C. Daniel, et al. 2013. "Aerosol Formation from High-Pressure Sprays for Supporting the Safety Analysis for the Hanford Waste Treatment and Immobilization Plant." In WM 2013: Waste Management Conference: International Collaboration and Continuous Improvement, February 24-28, 2013, Phoenix, Arizona, Paper No. WM-13183. Tempe, Arizona:WM Symposia. PNNL-SA-92454.
  • Mahoney L.A., P.A. Gauglitz, M.L. Kimura, G.N. Brown, D.E. Kurath, W.C. Buchmiller, and D.M. Smith, et al. 2013. Small-Scale Spray Releases: Initial Aerosol Test Results. PNNL-21367 Rev. 1. Richland, WA: Pacific Northwest National Laboratory.
  • Schonewill P.P., P.A. Gauglitz, M.L. Kimura, G.N. Brown, L.A. Mahoney, D.N. Tran, and C.A. Burns, et al. 2013. Small-Scale Spray Releases: Additional Aerosol Test Results. PNNL-22402; WTP-RPT-222 Rev.0. Richland, WA: Pacific Northwest National Laboratory.

2012

  • Kurath D.E., B.E. Wells, J.L. Huckaby, L.A. Mahoney, R.C. Daniel, C.A. Burns, and J.M. Tingey, et al. 2012. "Hanford Waste Physical and Rheological Properties: Data and Gaps." In Waste Management Symposium (WM 2012): Improving the Future of Waste Management, February 26 - March 1, 2012, Phoenix, Arizona, Paper No. 12078. Tucson, Arizona:WM Symposia, Inc. PNNL-SA-84207.
  • Mahoney L.A., P.A. Gauglitz, J. Blanchard, M.L. Kimura, and D.E. Kurath. 2012. Small-Scale Spray Releases: Orifice Plugging Test Results. PNNL-21361. Richland, WA: Pacific Northwest National Laboratory.
  • Mahoney L.A., P.A. Gauglitz, M.L. Kimura, G.N. Brown, D.E. Kurath, W.C. Buchmiller, and D.M. Smith, et al. 2012. Small-Scale Spray Releases: Initial Aerosol Test Results. PNNL-21367. Richland, WA: Pacific Northwest National Laboratory.

2011

  • Gauglitz P.A., L.A. Mahoney, J. Blanchard, and J.A. Bamberger. 2011. Surface Tension Estimates for Droplet Formation in Slurries with Low Concentrations of Hydrophobic Particles, Polymer Flocculants or Surface-Active Contaminants. PNNL-20466. Richland, WA: Pacific Northwest National Laboratory.
  • Mahoney L.A., B.M. Rapko, and P.P. Schonewill. 2011. "Modeling the Sodium Recovery Resulting from Using Concentrated Caustic for Boehmite Dissolution." Industrial and Engineering Chemistry Research 50, no. 20:11570-11575. PNNL-SA-78518. doi:10.1021/ie2008289
  • Mahoney L.A., D. Neiner, R.A. Peterson, B.M. Rapko, R.L. Russell, and P.P. Schonewill. 2011. Alternative Sodium Recovery Technology-High Hydroxide Leaching: FY10 Status Report. PNNL-20166. Richland, WA: Pacific Northwest National Laboratory.
  • Wells B.E., D.E. Kurath, L.A. Mahoney, Y. Onishi, J.L. Huckaby, S.K. Cooley, and C.A. Burns, et al. 2011. Hanford Waste Physical and Rheological Properties: Data and Gaps. PNNL-20646. Richland, WA: Pacific Northwest National Laboratory.

2010

  • Kurath D.E., R.C. Daniel, D.L. Baldwin, B.M. Rapko, S.M. Barnes, R.A. Gilbert, and L.A. Mahoney, et al. 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, 5, 3762-3776. Tucson, Arizona:Waste Management Symposia, Inc. PNNL-SA-69595.
  • Mahoney L.A., S.D. Rassat, P.W. Eslinger, R.L. Aaberg, P.M. Aker, E.C. Golovich, and B.D. Hanson, et al. 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. Richland, WA: Pacific Northwest National Laboratory.
  • Recknagle K.P., E.M. Ryan, B.J. Koeppel, L.A. Mahoney, and M.A. Khaleel. 2010. "Modeling of Electrochemistry and Steam-Methane Reforming Performance for Simulating Pressurized Solid Oxide Fuel Cell Stacks." Journal of Power Sources 195, no. 19:6637-6644. PNNL-SA-71093.
  • Recknagle K.P., E.M. Ryan, B.J. Koeppel, L.A. Mahoney, and M.A. Khaleel. 2010. "Modeling of Electrochemistry and Steam-Methane Reforming Performance for Simulating Pressurized Solid Oxide Fuel Cell Stacks." Journal of Power Sources 195, no. 19:6637-6644. PNNL-SA-75217. doi:10.1016/j.jpowsour.2010.04.024
  • Wells B.E., R.L. Russell, L.A. Mahoney, G.N. Brown, D.E. Rinehart, W.C. Buchmiller, and E.C. Golovich, et al. 2010. Hanford Sludge Simulant Selection for Soil Mechanics Property Measurement. PNNL-19250. Richland, WA: Pacific Northwest National Laboratory.

2009

  • Kurath D.E., B.D. Hanson, M.J. Minette, D.L. Baldwin, B.M. Rapko, L.A. Mahoney, and P.P. Schonewill, et al. 2009. Pretreatment Engineering Platform Phase 1 Final Test Report. PNNL-18894; WTP-RPT-197 Rev 0. Richland, WA: Pacific Northwest National Laboratory.
  • Mahoney L.A., S.D. Rassat, P.W. Eslinger, R.L. Aaberg, P.M. Aker, E.C. Golovich, and B.D. Hanson, et al. 2009. EFRT M-12 Issue Resolution: Caustic Leach Rate Constants from PEP and Laboratory-Scale Tests. PNNL-18502. Richland, WA: Pacific Northwest National Laboratory.

2008

  • Mahoney L.A., J.M. Alzheimer, S.T. Arm, C.E. Guzman-Leong, L.K. Jagoda, C.W. Stewart, and B.E. Wells, et al. 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. Tucson, Arizona:Arizona Board of Regents. PNNL-SA-58053.
  • Poloski A.P., B.E. Wells, L.A. Mahoney, R.C. Daniel, J.M. Tingey, and S.K. Cooley. 2008. "Effects of Sludge Particle Size and Density on Hanford Waste Processing." In Waste Management '08: Phoenix Rising: Moving Forward in Waste Management, Paper No. 8347. Tucson, Arizona:WM Symposium, Inc. PNNL-SA-58186.
  • Stewart C.W., C.E. Guzman-Leong, S.T. Arm, M.G. Butcher, E.C. Golovich, L.K. Jagoda, and W.R. Park, et al. 2008. Results of Large-Scale Testing on Effects of Anti-Foam Agent on Gas Retention and Release. PNNL-17170. Richland, WA: Pacific Northwest National Laboratory.

2007

  • Poloski A.P., B.E. Wells, J.M. Tingey, L.A. Mahoney, M.N. Hall, S.L. Thomson, and G. Smith, et al. 2007. Estimate of Hanford Waste Rheology and Settling Behavior. PNNL-16857. Richland, WA: Pacific Northwest National Laboratory.
  • Schmitt B.E., L.A. Mahoney, and G.W. 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. Alexandria, Virginia:Energy Facility Contractors Group. PNNL-SA-55038.

2006

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

2005

  • Mahoney L.A., and J.D. Vienna. 2005. Feed Variability and Bulk Vitrification Glass Performance Assessment. PNNL-14985 Rev.0. Richland, WA: Pacific Northwest National Laboratory.
  • Stewart C.W., M.S. Fountain, J.L. Huckaby, L.A. Mahoney, P.A. Meyer, and B.E. Wells. 2005. Effects of Globally Waste Disturbing Activities on Gas Generation, Retention, and Release in Hanford Waste Tanks. PNNL-13781 Rev. 3. Richland, WA: Pacific Northwest National Laboratory.

2004

  • Huckaby J.L., L.A. Mahoney, J.G. Droppo, and J.E. Meacham. 2004. Overview of Hanford Site High-Level Waste Tank Gas and Vapor Dynamics. PNNL-14831. Richland, WA: Pacific Northwest National Laboratory.

2003

  • Onishi Y., D.S. Trent, B.E. Wells, and L.A. Mahoney. 2003. Assessment of Tank 241-S-112 Liquid Waste Mixing in Tank 241-SY-101. PNNL-14399. Richland, WA: Pacific Northwest National Laboratory.
  • Rassat S.D., L.A. Mahoney, B.E. Wells, D.P. Mendoza, and D.D. Caldwell. 2003. Assessment of Physical Properties of Transuranic Waste in Hanford Single-Shell Tanks. PNNL-14221. Richland, WA: Pacific Northwest National Laboratory.
  • Rassat S.D., L.A. Mahoney, R.L. Russell, S.A. Bryan, and R.L. Sell. 2003. Cold Dissolved Saltcake Waste Simulant Development, Preparation, and Analysis. PNNL-14194 Rev. 1. Richland, WA: Pacific Northwest National Laboratory.
  • Rassat S.D., L.A. Mahoney, R.L. Russell, S.A. Bryan, and R.L. Sell. 2003. Cold Dissolved Saltcake Waste Simulant Development, Preparation, and Analysis. PNNL-14194. Richland, WA: Pacific Northwest National Laboratory.
  • Rassat S.D., L.M. Bagaasen, L.A. Mahoney, R.L. Russell, D.D. Caldwell, and D.P. Mendoza. 2003. Physical and Liquid Chemical Simulant Formulations for Transuranic Waste in Hanford Single-Shell Tanks. PNNL-14333. Richland, WA: Pacific Northwest National Laboratory.

2002

  • Mahoney L.A., and C.W. Stewart. 2002. Review of the Technical Basis of the Hydrogen Control Limit for Operations in Hanford Tank Farms. PNNL-13933 Rev. 1. Richland, WA: Pacific Northwest National Laboratory.
  • Wells B.E., J.M. Cuta, S.A. Hartley, L.A. Mahoney, P.A. Meyer, and C.W. Stewart. 2002. Analysis of Induced Gas Released During Retrieval of Hanford Double-Shell Tank Waste. PNNL-13782. Richland, WA: Pacific Northwest National Laboratory.
  • Wells B.E., J.M. Cuta, S.A. Hartley, L.A. Mahoney, P.A. Meyer, and C.W. Stewart. 2002. Analysis of Induced Gas Releases During Retrieval of Hanford Double-Shell Tank Waste. PNNL-13782 Rev. 1. Richland, WA: Pacific Northwest National Laboratory.

2000

  • Mahoney L.A. 2000. Ammonia Results Review for Retained Gas Sampling. PNNL-13317. Richland, WA: Pacific Northwest National Laboratory.
  • Mahoney L.A., J.L. Huckaby, S.A. Bryan, and G.D. Johnson. 2000. Overview of the Flammability of Gases Generated in Hanford Waste Tanks. PNNL-13269. Richland, WA: Pacific Northwest National Laboratory.
  • Stewart C.W., L.A. Mahoney, and W.B. Barton. 2000. Analysis of Several Hazardous Conditions for Large Transfer and Back-Dilution Sequences in Tank 241-SY-101. PNNL-13118. Richland, WA: Pacific Northwest National Laboratory.

1999

  • Mahoney L.A., Z.I. Antoniak, J.M. Bates, and M.E. Dahl. 1999. Retained Gas Sampling Results for the Flammable Gas Program. PNNL-13000. Richland, WA: Pacific Northwest National Laboratory.
  • Rassat S.D., P.A. Gauglitz, S.M. Caley, L.A. Mahoney, and D.P. Mendoza. 1999. A Discussion of SY-101 Crust Gas Retention and Release Mechanisms. PNNL-12092. Richland, WA: Pacific Northwest National Laboratory.

Experimental and Computational Engineering

Additional Information