(109) Salazar, A. and J. Ahn, Modeling Accumulation of Thermally Fissile Material from Waste Canister Array. Transactions of American Nuclear Society, 111, 440-443. 2014 ANS Winter Meeting and Nuclear Technology Expo, "Nuclear-The Foundation of Clean Energy", Disneyland Hotel, Anaheim, CA, 9-13 November 2014. American Nuclear Society.

(108) Woo, S.M. and J. Ahn, Model development for Pu-mass accountancy of pyrometallurgical processing with the Pu/Cm-244 ratio method. Actinide and Fission Product Partitioning and Transmutation, 13th Information Exchange Meeting, Seoul, Republic of Korea, 23-26 September 2014. OECD Nuclear Energy Agency (NEA).

(107) Sunderland, M.E., J. Ahn, C. Carson, and W.E. Kastenberg, Making Ethics Explicit: Relocating Ethics to the Core of Engineering Education, 120th ASEE Annual Conference & Exposition, June 23-26, 2013, Atlanta, GA, Paper #6372, American Society for Engineering Education.

(106) Van den Akker, B. P., and J. Ahn, Performance Assessment for the Geological Disposal of Deep Burn Spent Fuel Using TTBX, The 11th International Conference, GLOBAL 2013, Sep. 29- Oct. 3 2013, Salt Lake City, Utah.

(105) Liu, X., E. Lemaître-Xavier, J. Ahn, and F. Hirano, Criticality Safety Analysis on Fissile Materials in Fukushima Reactor Cores, The 11th International Conference, GLOBAL 2013, Sep. 29- Oct. 3 2013, Salt Lake City, Utah.

(104) van den Akker, B. P., and J. Ahn, Model Development for Transport of Radionuclides via Heterogeneous Geological Media, 14th International High-Level Radioactive Waste Management Conference (IHLRWM), April 28-May 2, 2013, Albuquerque, New Mexico, American Nuclear Society, 2013.

(103) Liu, X., J. Ahn, and F. Hirano, Repository Criticality Analysis for Damaged Fuels: Geometry Effect in the Modeling of Uranium and Plutonium Deposition in Geological Formations, 14th International High-Level Radioactive Waste Management Conference (IHLRWM), April 28-May 2, 2013, Albuquerque, New Mexico, American Nuclear Society, 2013.

(102) Lemaître-Xavier, E. and J. Ahn, Criticality Safety for Plutonium-Filled Canister in a Repository, 14th International High-Level Radioactive Waste Management Conference (IHLRWM), April 28-May 2, 2013, Albuquerque, New Mexico, American Nuclear Society, 2013.

(101) Juraku, K., J. Ahn, S. Nagasaki, C. Carson and M. Jensen, An Advanced Educational Program for Nuclear Professionals with Social Scientific Literacy: A Collaborative Initiative by UC Berkeley & Univ. of Tokyo on the Fukushima Accident, The 10th International Conference, GLOBAL 2011, Toward and Over the Fukushima Daiichi Accident, Dec. 11-16, 2011, Makuhari, Japan, Paper No. 449192

(100) Di Sanzo, C. D., and J. Ahn, Effects of Burn-up, Recovery Efficiency and Waste Form on the Environmental Impact of Fusion-Fission Transmutation Systems, The 10th International Conference, GLOBAL 2011, Toward and Over the Fukushima Daiichi Accident, Dec. 11-16, 2011, Makuhari, Japan, Paper No. 392654

(99) van den Akker, B. P., and J. Ahn, Deep-Burn Spent Fuel: Graphite as a Possible High Level Waste Matrix, The 10th International Conference, GLOBAL 2011, Toward and Over the Fukushima Daiichi Accident, Dec. 11-16, 2011, Makuhari, Japan, Paper No. 392626

(98) Ahn, J., Radioactive Waste Management Education at Nuclear Engineering Department, UC Berkeley, Transactions, 105, 178-179, 2011 Winter Meeting, Washington DC, October 30—November 3, 2011, American Nuclear Society, 2011.

(97) Kim, L., J. Ahn, J. Choi, Y. Hwang, P. F. Peterson, Nuclear Fuel Cycle Management in Emerging Nuclear Countries, 13h International High-Level Radioactive Waste Management Conference (IHLRWM), April 10-14, 2011, Albuquerque, New Mexico, American Nuclear Society, 2011.

(96) Linhares, M., and J. Ahn, Parametric Study for Radionuclide Transport in a Geological Repository on Modeled Geometric Fidelity, 13h International High-Level Radioactive Waste Management Conference (IHLRWM), April 10-14, 2011, Albuquerque, New Mexico, American Nuclear Society, 2011.

(95) Yoon, J., and J. Ahn, Performance Assessment for Korean Concept of Geological Disposal, 13h International High-Level Radioactive Waste Management Conference (IHLRWM), April 10-14, 2011, Albuquerque, New Mexico, American Nuclear Society, 2011.

(94) Di Sanzo, C. D., and J. Ahn, Cradle-to-Grave Analysis of Fusion-Fission Transmutation Fuel Cycles, 13h International High-Level Radioactive Waste Management Conference (IHLRWM), April 10-14, 2011, Albuquerque, New Mexico, American Nuclear Society, 2011.

(93) van den Akker, B. P., and J. Ahn, The Release and Transport of Radionuclides from Deep-Burn Spent Fuel, 13h International High-Level Radioactive Waste Management Conference (IHLRWM), April 10-14, 2011, Albuquerque, New Mexico, American Nuclear Society, 2011.

(92) van den Akker, B. P., J. Ahn, and B. Tam, Solubilities of Radionuclides Released from Graphite Waste Calculated Using PHREEQC, 13h International High-Level Radioactive Waste Management Conference (IHLRWM), April 10-14, 2011, Albuquerque, New Mexico, American Nuclear Society, 2011.

(91) Van den Akker, B. P., and J. Ahn, The Performance of Deep-Burn TRISO Spent Fuel in a Geological Repository, 11th OECD/NEA Information Exchange Meeting on Actinide and Fission Product Partitioning and Transmutation, November 1-4, 2010, San Francisco, California, OECD/NEA, 2010. Proceedings, list of poster contributions, paper

(90) Di Sanzo, C., and J. Ahn, Environmentyal Impact Analysis for Fusion-Fission Transmutation Systems, 11th OECD/NEA Information Exchange Meeting on Actinide and Fission Product Partitioning and Transmutation, November 1-4, 2010, San Francisco, California, OECD/NEA, 2010. Proceedings, list of poster contributions, paper

(89) Yoon, J., and J. Ahn, The Environmental Impacts of Korean Advanced Nuclear Cycle KIEP-21 and Disposal Concepts, 11th OECD/NEA Information Exchange Meeting on Actinide and Fission Product Partitioning and Transmutation, November 1-4, 2010, San Francisco, California, OECD/NEA, 2010. Proceedings

(88) Ahn, J., B. P. van den Akker, G. Cerefice, G. H. Schmidt, F. Venneri, The Repository Performance of Spent TRISO Fuel, HTR 2010, 5th International Conference on High Temperature Reactor Technology, Paper #98, October 18–20, 2010, Prague, Czech Republic.

(87) Yoon, J., and J. Ahn, Environmental Performance Analysis for the Korean Advanced Nuclear Fuel Cycle Concept, Transactions, 102, 137-138, 2010 Annual Meeting, San Diego, CA, June 13-17, 2010, American Nuclear Society, 2010.

(86) Craplet, R., and J. Ahn, Development of an Analytical Fuel Cycle Model, Transactions, 102, 131-132, 2010 Annual Meeting, San Diego, CA, June 13-17, 2010, American Nuclear Society, 2010.

(85) van den Akker, B. P., and J. Ahn, Performance of Deep-Burn Spent Fuel in a Geological Repository, Transactions, 102, 103-104, 2010 Annual Meeting, San Diego, CA, June 13-17, 2010, American Nuclear Society, 2010.

(84) Yoon, J., and J. Ahn, Comparison Study of Radionuclide Transport Model for ILW and HLW Repositories between Advanced Nuclear Fuel Cycle Concept (KIEP – 21) and Reference Spent Fuel Disposal System (KRS) of Korea, PSAM 10, 10th International Probabilistic Safety Assessment & Management Conference, June 7 – 11, 2010, Renaissance Seattle Hotel, Seattle, Washington.

(83) van den Akker, B. P., and J. Ahn, The Performance of Deep-Burn TRISO Spent Fuel in a Geological Repository, PSAM 10, 10th International Probabilistic Safety Assessment & Management Conference, June 7 – 11, 2010, Renaissance Seattle Hotel, Seattle, Washington.

(82) Narita, M., Y. Niibori, H. Mimura, A. Kirishima, and J. Ahn, Sorption Behavior of Eu(III) into CSH gel with relatively low Ca/Si ratio <1.0, WM 2010 Conference, Paper # 10096, March 7-11, 2010, Phoenix, Arizona.

(81) Ahn, J., Effects of Conditions on Recycling and Repository for Environmental-Impact Reduction, GLOBAL 2009, Nuclear Fuel Cycle: Sustainable Options $ Industrial Perspectives, Sep. 6-11, 2009, Paris, France, American Nuclear Society.

(80) Vujic, J., and J. Ahn, Nuclear Renaissance and Role of University Research and Education in the US, 16th Pacific Basin Nuclear Conference (16PBNC), Aomori, Japan, Oct. 13-18, 2008.

(79) Murakami, H., and J. Ahn, Development of Geologic Repository Models for Design and Decision Making, 16th Pacific Basin Nuclear Conference (16PBNC), Aomori, Japan, Oct. 13-18, 2008.

(78) Ahn, J., Effects of Repository Conditions on Environmental Impact Reduction by Recycling, 10th OECD/NEA Information Exchange Meeting on Actinide and Fission Product Partitioning and Transmutation, October 6-10, 2008, Mito, Japan, OECD/NEA, 2008.

(77) Murakami, H., and J. Ahn, Development of Compartment Models for Radionuclide Transport in Repository Region, 12th International High-Level Radioactive Waste Management Conference (IHLRWM), September 7-11, 2008, Las Vegas, Nevada, American Nuclear Society, 2008.

(76) Kawasaki, D., and J. Ahn, Multiscale Analysis of Radionuclide Migration Using Markov Chain Models, 12th International High-Level Radioactive Waste Management Conference (IHLRWM), September 7-11, 2008, Las Vegas, Nevada, American Nuclear Society, 2008.

(75) Ahn, J., Repository Conditions and Environmental Impacts Reduction by Recycling, 12th International High-Level Radioactive Waste Management Conference (IHLRWM), September 7-11, 2008, Las Vegas, Nevada, American Nuclear Society, 2008.

(74) Bouvier E., J. Ahn, and T. Ikegami, Effects of Reactor, Fuel Cycle, and Repository Configurations on Environmental Impacts, Transactions, 98, 2008 Annual Meeting, Anaheim, CA, June 8-12, 2008, American Nuclear Society, 2008.

(73) Ahn, J., Current Status of Nuclear-Energy Development and Role of University Research and Education in US, Proc. International Symposium on EcoTopia Science 2007, ISETS07, Nov. 23-25, 2007, 995-1001, Nagoya University, Japan.

(72) Ahn, J., Repository Capacity Expansion with Minimization of Environmental Impacts by Advanced Nuclear Fuel Cycles, Proc. International Symposium on EcoTopia Science 2007, ISETS07, Nov. 23-25, 2007, 1026-1031, Nagoya University, Japan.

(71) Djokic, D., and J. Ahn, Environmental Impact of Yucca Mountain Repository After UREX+1A Separation, GLOBAL 2007, Advanced Nuclear Fuel Cycles and Systems, Sep. 9-13, 2007, Boise, Idaho, American Nuclear Society.

(70) Ahn, J., and M. Kurata, Mathematical Model for Transmutation System with a Two-Member Chain and Variable Separation Coefficients, GLOBAL 2007, Advanced Nuclear Fuel Cycles and Systems, Sep. 9-13, 2007, Boise, Idaho, American Nuclear Society.

(69) Bouvier E., J. Ahn, and T. Ikegami, Comparison of Environmental Impacts for PWR-UO2, PWR-MOX and FBR, GLOBAL 2007, Advanced Nuclear Fuel Cycles and Systems, Sep. 9-13, 2007, Boise, Idaho, American Nuclear Society.

(68) Ahn, J., K. C. Bimova, A. Bychkov, T. Inoue, L. Koch, Kormilitsyn, K. Nagarajan, H. Nawada, Y. Ye, and J. H. Yoo, Status of IAEA CRP on Study of Process-Losses in Separation Processes in Partitioning and Transmutation Systems in View of Minimizing Long-Term Environmental Impacts, GLOBAL 2007, Advanced Nuclear Fuel Cycles and Systems, Sep. 9-13, 2007, Boise, Idaho, American Nuclear Society.

(67) Borrelli, R. A., and J. Ahn, Impact of Bentonite Extrusion on Radionuclide Migration in a Saturated Planar Fracture, 3rd International Meeting, Clays in Natural & Engineered Barriers for Radioactive Waste Confinement, Sep. 17- 20, 2007, Lille, France.

(66) Bouvier, E., and J. Ahn, Burnup Effects on the Environmental Impact from Vitrified HLW, Transactions, 96, 171-172, 2007 Annual Meeting, Boston, MA, June 24-28, 2007, American Nuclear Society, 2007.

(65) Djokic, D., and J. Ahn, Environmental Impact of Yucca Mountain Repository After UREX+ Separation, Transactions, 96, 173-174, 2007 Annual Meeting, Boston, MA, June 24-28, 2007, American Nuclear Society, 2007.

(64) Tsujimoto, K., H. Okuda, J. Ahn, Uncertainty Analysis of Multiple Canister Repository Model by Large-Scale Calculation, Joint International Topical Meeting on Mathematics & Computation and Supercomputing in Nuclear Applications (M&C + SNA 2007), Monterey, California, April 15-19, 2007, American Nuclear Society, 2007.

(63) Murakami, H., and J. Ahn, Compartment Model for a Geologic Repository with Stochastic Approach, Transactions, 95, 173-174, 2006 Winter Meeting, Albuquerque, NM, November 12-16, 2006, American Nuclear Society, 2006.

(62) Kawasaki, D., and J. Ahn, Compartment Model for Particle Migration with Residence Time Distributions, 11th International High-Level Radioactive Waste Management Conference (IHLRWM), April 30-May 4, 2006, Las Vegas, Nevada, American Nuclear Society, 2006.

(61) Borrelli, R. A., and J. Ahn, Bentonite Extrusion in Planar Fracture Based on Net Water Flow, 11th International High-Level Radioactive Waste Management Conference (IHLRWM), April 30-May 4, 2006, Las Vegas, Nevada, American Nuclear Society, 2006.

(60) Tsujimoto, K., and J. Ahn, Uncertainty Analysis of Multiple Canister Repository Model by Earth Simulator, 11th International High-Level Radioactive Waste Management Conference (IHLRWM), April 30-May 4, 2006, Las Vegas, Nevada, American Nuclear Society, 2006.

(59) Ahn, J., and L. Ackerman, Environmental Impact of Yucca Mountain Repository, Transactions, 93, 731-732, 2005 Winter Meeting, Washington D.C., November 13-17, 2005, American Nuclear Society, 2005.

(58) Kawasaki, D., J. Ahn, and P. L. Chambre, Markov Chain Model for Particle Migration at the Repository Scale, Global 2005, Tsukuba, Japan, Oct 9-13, 2005, AESJ, ANS, 2005.

(57) Kawasaki, D., J. Ahn, and M. Kurata, Effects of Reductive Extraction Process on the Environmental Impact of Geologic Disposal, Global 2005, Tsukuba, Japan, Oct 9-13, 2005, AESJ, ANS, 2005.

(56) Cheon, M., and J. Ahn, Expansion of Yucca Mountain Repository Capacity by ATW Fuel Cycle, Global 2005, Tsukuba, Japan, Oct 9-13, 2005, AESJ, ANS, 2005.

(55) Cheon, M., and J. Ahn, Linear Programming Approach for Modeling Solidification of HLW from ATW Fuel Cycle, Global 2005, Tsukuba, Japan, Oct 9-13, 2005, AESJ, ANS, 2005.

(54) Ahn, J., and T. Ikegami, Reduction of HLW Repository Environmental Impact by Na-Cooled FBR, Global 2005, Tsukuba, Japan, Oct 9-13, 2005, AESJ, ANS, 2005.

(53) Ahn, J., Environmental Impact of Yucca Mountain Repository, Global 2005, Tsukuba, Japan, Oct 9-13, 2005, AESJ, ANS, 2005.

(52) Tsujimoto, K., and J. Ahn, Uncertainty Analysis of Multiple Canister Repository Model by Earth Simulator, Global 2005, Tsukuba, Japan, Oct 9-13, 2005, AESJ, ANS, 2005.

(51) Tsujimoto, K., and J. Ahn, Large-Scale Simulation of Rock Fracture Network for Mass Transport in Geologic Repository by Earth Simulator, Global 2005, Tsukuba, Japan, Oct 9-13, 2005, AESJ, ANS, 2005.

(50) Kawasaki, D., J. Ahn, J.-B. Park, and C.-L. Kim, Performance Assessment for Conceptual LLW Repository in Korea, Transactions, 92, 346-347, 2005 Annual Meeting, San Diego, June 5-9, 2005, American Nuclear Society, 2005.

(49) Cheon, M., J. Ahn, and T. Ikegami, Linear Programming Approach for Modeling Solidification of HLW from PWR, Transactions, 92, 323-324, 2005 Annual Meeting, San Diego, June 5-9, 2005, American Nuclear Society, 2005.

(48) Ahn, J., and T. Ikegami, Repository Environmental Impact of HLW from Na-Cooled FBR, Transactions, 92, 181-182, 2005 Annual Meeting, San Diego, June 5-9, 2005, American Nuclear Society, 2005.

(47) Park, J.-B., J.-W. Park, C.-L. Kim, M.- J. Song, D. Kawasaki and J. Ahn, Safety Assessment Codes for the Near-Surface Disposal of Low and Intermediate-Level Radioactive Waste with the Compartment Models: SAGE and VR-KHNP, WM-5211, WM’05 Conference, February 27-March 3, 2005, Tucson, AZ, 2005.

(46) Cheon, M., J. Ahn, and P. L. Chambré, Linear Programming Model for High-Level Waste Conditioning, Transactions, 91, 437-438, 2004 Winter Meeting, Washington DC, November 14-18, 2004, American Nuclear Society, 2004.

(45) Ahn, J., and T. Ikegami, Effective Application of Partitioning and Transmutation Technologies to Geologic Disposal, Eighth Information Exchange Meeting on Actinide and Fission Product Partitioning & Transmutation, Las Vegas, Nevada, Nuclear Energy Agency, Organization for Economic Co-operation and Development (OECD/NEA), Nov. 9-11, 2004.

(44) Tsujimoto, K., T. Mitsuhashi, S. Ueta, and J. Ahn, Effects of Fuel Burn-up on Repository Performance, Global2003, “Atoms for Prosperity: Updating Eisenhower’s GlobalVision for Nuclear Energy,” New Orleans, Louisiana, American Nuclear Society, 11/16-20, 2003.

(43) Cheon, M., J. Ahn, E. Greenspan, and P. L. Chambré, Reduction of TRU Toxicity in LWR-Spent Fuel by Reference ATW System with LBE-Cooled Subcritical Transmuters, Global2003, “Atoms for Prosperity: Updating Eisenhower’s GlobalVision for Nuclear Energy,” New Orleans, Louisiana, American Nuclear Society, 11/16-20, 2003.

(42) Ahn, J., D. Kawasaki, and P. L Chambré, Environmental Impact and Capacity Expansion of Geologic Repository, Global2003, “Atoms for Prosperity: Updating Eisenhower’s GlobalVision for Nuclear Energy,” New Orleans, Louisiana, American Nuclear Society, 11/16-20, 2003.

(41) Cheon, M., J. Ahn, E. Greenspan, and P. L. Chambré, Cycle Dependent Fuel Inventory Evolution in ATW Fuel Cycle, Nuclear Applications of Accelerator Technology (AccApp'03), “Accelerator Applications in a Nuclear Renaissance” San Diego, California – June 1-5, 2003, American Nuclear Society.

(40) Ahn, J., For Sustainable Use of Nuclear Power with Reduced repository Impacts, 11th International Conference on Nuclear Engineering, ICONE11-36390, Tokyo, Japan, April 20-23, 2003, ASME, JSME, and AESJ.

(39) Kawasaki, D., J. Ahn, P. L. Chambré, and W. G. Halsey, Canister-Array Configuration and Congruent Release of Long-Lived Radionuclides, 2003 International High-Level Radioactive Waste Management Conference, March 30-April 2, 2003, Las Vegas, Nevada, American Nuclear Society.

(38) Lim, D., J. Ahn, and P. L. Chambré, Modeling of Contaminant Transport in Fractured Near-Field Rock, 2003 International High-Level Radioactive Waste Management Conference, March 30-April 2, 2003, Las Vegas, Nevada, American Nuclear Society.

(37) Park, B. H., J. Ahn, and P. L. Chambré, Steady-State TRU Reduction Ratio of Transmutation System, Transactions, 87, American Nuclear Society 2002 Winter Meeting, November 17-21, 2002, Washington, D. C., USA.

(36) Rodriguez-Vieitez, E., M. D. Lowenthal1, E. Greenspan and J. Ahn, Optimization of a Molten-Salt Transmuting Reactor, PHYSOR 2002, the International Conference on the New Frontiers of Nuclear Technology: Reactor Physics, Safety and High-Performance Computing, October 7-10, 2002.

(35) Cheon, M., J. Ahn, E. Greenspan, D. Barnes, and P. L. Chambré, A Simplified Model for Fuel Isotope Evolution in ATW Systems--Liquid Metal Cooled Fast Reactor--, PHYSOR 2002, the International Conference on the New Frontiers of Nuclear Technology: Reactor Physics, Safety and High-Performance Computing, October 7-10, 2002.

(34) Rodriguez-Vieitez, E., M. D. Lowenthal, E. Greenspan and J. Ahn, Optimization of a Molten-Salt Transmuting Reactor, Transactions, American Nuclear Society 2002 Annual Meeting, June, 9-13, 2002, Hollywood, FL, USA.

(33) Lim, D, J. Ahn, and P. L. Chambré, A Model for Water Flow and Particle Transport in Fractured Media, International Groundwater Symposium organized by International Association of Hydraulic Engineering and Research (IAHR), “Bridging the Gap between Measurement and Modeling in Heterogeneous Media,” March 25-28, 2002, Berkeley, California, 2002.

(32) Park, B. H., J. Ahn, and P. L. Chambré, Mass Flow Analysis of Transmutation System, 2001 Winter Meeting, Reno, November 12-15, 2001, American Nuclear Society, 2001.

(31) Ishida, H., J. Ahn, and P. L. Chambré, Analysis of Waste Composition from Light Water Reactor Fuel Cycle, Global 2001, International Conference on "Back-end of the fuel cycle: from research to solutions," Paris, France, 9/9-9/13 (2001).

(30) Ahn, J., and P. L. Chambré, Alternative Measure for Performance of HLW Geologic Repository, Global 2001, International Conference on "Back-end of the fuel cycle: from research to solutions," Paris, France, 9/9-9/13 (2001).

(29) Kawasaki, D., J. Ahn, and P. L. Chambré, Analysis on Radionuclide Transport in a repository with Multiple Canisters, 2001 International High-Level Radioactive Waste Management Conference, April 29–May 3, 2001, Las Vegas, Nevada, American Nuclear Society, 2001.

(28) Lim, D., J. Ahn, and P. L. Chambré, Flow Analysis in the Near Field of Geologic Repository, 2001 International High-Level Radioactive Waste Management Conference, April 29–May 3, 2001, Las Vegas, Nevada, American Nuclear Society, 2001.

(27) Ahn, J., P. L. Chambré, and J. Verbeke, Numerical Simulation of Bentonite Extrusion in a Horizontal Planar Fracture, Scientific Basis for Nuclear Waste Management XXIII, Materials Research Society, November 29-December 3, 1999, Boston, Massachusetts, Hynes Convention Center, Boston Marriott Copley Place, Proc. Vol. 608, 185-190, 2000.

(26) Tsujimoto, K., and J. Ahn, Development of Object-Oriented Simulation Code for Repository Performance Assessment, 1999 Winter Meeting, Long Beach, November 14-18, 1999, American Nuclear Society, 1999.

(25) Denda, Y., J. Ahn, and P. L. Chambré, Performance Assessment for TRU Waste Disposal, 1999 Winter Meeting, Long Beach, November 14-18, 1999, American Nuclear Society, 1999.

(24) Chambré, P. L., J. Ahn, B. H. Park, and M. D. Lowenthal, Conceptual Model for Transmutation and Recycling of Six-Member Chain with Homogenized Core, 1999 Winter Meeting, Long Beach, November 14-18, 1999, American Nuclear Society, 1999.

(23) Ahn, J., Possibility of Safety Improvement for Vitrified HLW Geologic Disposal by Partitioning and Transmutation, Global ‘99, International Conference on Future Nuclear Systems, August 29-September 3, 1999, Jackson Hole, Wyoming (1999).

(22) Ahn, J., Preliminary Assessment of the Effects of ATW System Application on YM Repository Performance, Global ‘99, International Conference on Future Nuclear Systems, August 29-September 3, 1999, Jackson Hole, Wyoming (1999).

(21) Ahn, J., P. Chambré, E. Greenspan, W. E. Kastenberg, M. D. Lowenthal, B. Park, and N. Stone, Impacts of Waste Transmutation on Repository Hazards, Global ‘99, International Conference on Future Nuclear Systems, August 29-September 3, 1999, Jackson Hole, Wyoming (1999).

(20) Denda, Y., and J. Ahn, A Safety Analysis for TRU Waste Disposal, Transactions, 80, 35-36, 1999 Annual Meeting, Boston, June 1-5, 1999, American Nuclear Society, 1999.

(19) Ahn, J., Advanced Nuclear Fuel Cycle for Improved Safety of Geologic Disposal, 2nd NUCEF International Symposium, Hitachinaka, Japan, November 16-17, 1998, Japan Atomic Energy Research Institute, 1999.

(18) Verbeke, J. M., J. Ahn, and P. L. Chambré, Long-Term Behavior of Buffer Materials in HLW Geologic Repositories, Proc., 8th International Conf., High-Level Radioactive Waste Management, Las Vegas, Nevada, May 11-14, 1998, American Nuclear Society, 1998.

(17) Hatanaka, K., and J. Ahn, Repository-wide Performance Assessment Model by Object-Oriented Approach, Proc., 8th International Conf., High-Level Radioactive Waste Management, Las Vegas, Nevada, May 11-14, 1998, American Nuclear Society, 1998.

(16) Kastenberg, W. E., L. J. Gratton, E. Greenspan, J. Ahn, P. L. Chambré, D. R. Olander, P. F. Peterson, and J. Vujic, Possibility of Autocatalytic Criticality in the Yucca Mountain Repository, Global ‘97, International Conference on Future Nuclear Systems, October 5-10, 1997, Yokohama, Japan (1997).

(15) Ahn, J., E. Greenspan, D. A. Roberts, and P. L. Chambré, Possibility of Underground Autocatalytic Criticality by Actinides in Vitrified HLW, Global ‘97, International Conference on Future Nuclear Systems, October 5-10, 1997, Yokohama, Japan (1997).

(14) Ahn, J., and D. A. Roberts, Effects of Multiple Canisters on Uranium Transport and Accumulation, Transactions, 76, 200-201, 1997 Annual Meeting, Orlando, Florida, June 1-5, 1997, American Nuclear Society, 1997.

(13) Greenspan, E., S. Armel, J. Ahn, and J. Vujic, Critical Depositions of Uranium in Rock Having positive Reactivity Feedback, American Nuclear Society Topical Meeting on “Criticality Safety Challenges in the Next decade,” September 7-11, 1997, Chelan, Washington, American Nuclear Society, 1997.

(12) Ahn, J., E. Greenspan, and P. L. Chambré, Analysis of Underground Autocatalytic Criticality by Vitrified HLW in Water-Saturated Geologic Repositories, Waste Management ‘97, March 12, 1997, Tucson, Arizona, Univ. of Arizona, American Nuclear Society, US DOE, ASME, 1997.

(11) Kastenberg, W. E., P. F. Peterson, J. Ahn, J. Burch, G. Casher, P. L. Chambré, E. Greenspan, D. R. Olander, J. L. Vujic, B. Bessinger, N. G. W. Cook, F. M. Doyle, and L. Brun Hilbert, Scenraio Assessment of Autocatalytic Criticality in the Yucca Mountain Geologic Repository, Waste Management ‘97, March 12, 1997, Tucson, Arizona, Univ. of Arizona, American Nuclear Society, US DOE, ASME, 1997.

(10) Ahn, J., and P. L. Chambré, Transport of Fissile and Poison Materials Through Fractured Geologic Media, Proc. DOE Spent Nuclear Fuel and Fissile Material Management, 273–280, June 16-20, 1996, Reno, Nevada, American Nuclear Society, 1996.

(9) Ahn, J., S. Nagasaki, S. Tanaka, and A. Suzuki, Effects of Smectite Illitization of Transport of Actinides Through Engineered Barriers of HLW Repositories, 1994 MRS Spring Meeting - Symposium – Scientific Basis for Nuclear Waste Management XVIII, October 1994, Kyoto, Japan, Mater. Res. Soc. Symp. Proc., 353, Materials Research Society, 1994. Link.

(8) Ahn, J., Transport of a Multiple-Member Decay Chain of Actinides in Engineered and Natural Barriers, Fourth International Conference on the Chemistry and Migration Behavior of Actinides and Fission Products in the Geosphere (Migration '93), University of Georgia, U. S. DOE, Commision of European Communities, IAEA, December 1993, Charleston, South Carolina, U. S. A., 1994. –––––> The paper was not submitted to the Proceedings of the conference. The content of this presentation is included in A1(17). No paper is available for A2(8).

(7) Ahn, J., and A. Suzuki, Key Radionuclides and Parameters That Determine Performance of Geologic Repositories for High-Level Radioactive Wastes, International Conference on Safe Management and Disposalof Nuclear Waste (Safewaste '93), European Nuclear Society, June 1993, Avignon, France, 1993.

(6) Ahn, J., Analysis of Diffusion in Fracture Networks of Geologic Media by Percolation Theory, Proc. 2nd Japan Internationl SAMPE Symp., 1991, Makuhari, Japan, 1452, 1991.

(5) Suzuki, A., J. Ahn, and Y. Makino, An Improved Design Concept of Radwaste Repository, 11th International Conf. on Structural Mechanics in Reactor Technol. (SMiRT 11), Transaction Vol. SD1, Tokyo, 1991, 319, 1991.

(4) Ahn, J., Y. Furuhama, Y. Li, A. Suzuki, Radionuclide Transport Through Fracture Networks by Percolation Theory,1991 Joint Int'l Waste Man. Conf., Am. Soc. Mech. Eng., Seoul, 1991.

(3) Ahn, J., Y. Makino, and A. Suzuki, Dispersion Effect on Radionuclide Transport in Geologic Disposal System,The Third Int'l Conf. Nuc Fuel Reprocess. Waste Man., RECOD '91, Sendai, 1991.

(2) Ahn, J., and S. Nakayama, Migration of a Redox-Sensitive Radionuclide in Engineered Barriers, The Third Int'l Symp. Adv. Nuc. Energy Res. “Global Environment and Nuclear Energy,” Japan Atom. Energy Res. Inst., Mito, 1991.

(1) Ahn, J., P. L. Chambré, and T. H. Pigford, Transient Diffusion from a Waste Solid into Water-Saturated, Fractured Porous Rock, International Symposium on the Safety Assessment of Radioactive Waste Management, OECD/NEA, October, 1989, Paris. Link.

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