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Fabrication of Thorium and Thorium Dioxide

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ABSTRACT
Thorium based nuclear fuel is of immense interest to India by virtue of the abundance of Thorium and relative shortage of Uranium. Thorium metal tubes were being cold drawn using copper as cladding to prevent die seizure. After cold drawing, the copper was removed by dissolution in nitric acid. Thorium does not dissolve being passivated by nitric acid. Initially the copper cladding was carried out by inserting copper tubes inside and outside the thorium metal tube. In an innovative development, the mechanical cladding with copper was replaced by electroplated copper with a remarkable improvement in thorium tube acceptance rates. Oxalate derived thoria powder was found to require lower compaction pressures compared to ammonium diuranate derived urania powders to attain the same green compact density. However, the green pellets of thoria were fragile and chipped during handling. The strength improved after introducing a ball milling step before compaction and maintaining the green density above the specified value. Alternatively, binders were used later for greater handling strength. Magnesia was conventionally being used as dopant to enhance the sinterability of thoria. The normal sintering temperature for magnesia doped thoria was 1600℃ - 1700℃, which was achieved in electrically heated molybdenum element sintering furnaces with reducing atmosphere. 0.25 mole percent addition of niobia to the thoria was found to bring down the sintering temperature to 1150℃. Sintering could be done in ordinary furnaces in air atmosphere using silicon carbide or Kanthal heating elements. Electrical conductivity was measured for both magnesia and niobia doped sintered thoria and used in interpreting differences in sintering behavior.
 
Cite this paper
Palanki, B. (2015) Fabrication of Thorium and Thorium Dioxide. Natural Science, 7, 10-17. doi: 10.4236/ns.2015.71002.
 
References
[1]Balakrishna, P., Varma, B.P., Krishnan, T.S., Mohan, T.R.R. and Ramakrishnan, P. (1986) The Role of Point Defects in the Sintering of UO2 and ThO2. Transactions of the Powder Metallurgy Association of India, 13, 117-125.
 
[2]Balakrishna, P., Varma, B.P., Rajendran, R. and Balaramamoorthy, K. (1987) Thorium Oxide Blanket Fabrication for Indian Fast Breeder Test Reactor. In: Proceedings of TCM, Utilization of Thorium Based Nuclear Fuel: Current Status and Perspectives, 7, 73-88.
 
[3]Balakrishna, P., Varma, B.P., Krishnan, T.S., Mohan, T.R.R. and Ramakrishnan, P. (1987) Developments in Thoria Calcination, Compaction and Sintering. Transactions of the Powder Metallurgy Association of India, 14, 76-82.
 
[4]Balakrishna, P., Varma, B.P., Krishnan, T.S., Mohan, T.R.R. and Ramakrishnan, P. (1988) Thorium Oxide: Calcination, Compaction and Sintering. Journal of Nuclear Materials, 160, 88-94.
http://dx.doi.org/10.1016/0022-3115(88)90012-8
 
[5]Balakrishna, P., Varma, B.P., Krishnan, T.S., Mohan, T.R.R. and Ramakrishnan, P. (1988) Low Temperature Sintering of Thoria. Journal of Materials Science Letters, 7, 657-660.
http://dx.doi.org/10.1007/BF01730326
 
[6]Balakrishna, P., Varma, B.P., Rajendran, R., Krishnan, T.S., Balaramamoorthy, K., Mohan, T.R.R. and Ramakrishnan, P. (1989) Activated Sintering of Thoria. Engineering Materials, 29, 669-676.
 
[7]Balakrishna, P., Somayajulu, G.V.S.R.K., Krishnan, T.S., Mohan, T.R.R. and Ramakrishnan, P. (1991) Developments in Low Temperature Sintering of Thoria. In: Vincenzini, P., Ed., Ceramics Today—Tomorrow’s Ceramics, Materials Science Monograph 66D, Elsevier, Amsterdam, 2995-3001.
 
[8]Balakrishna, P., Ananthapadmanabhan, V. and Ramakrishnan, P. (1994) Electrical Conductivity of Sintered Niobia Doped and Magnesia Doped Thoria. Journal of Materials Science Letters, 13, 86-88.
http://dx.doi.org/10.1007/BF00416807
 
[9]Balakrishna, P. (1994) Characterization and Sintering of Thorium Dioxide. Ph.D. Thesis, Indian Institute of Technology, Bombay.
 
[10]Balakrishna, P. (2012) ThO2 and (U,Th)O2 Processing—A Review. Natural Science, 4, 943-949.
http://dx.doi.org/10.4236/ns.2012.431123
 
[11]Kantan, S.K., Raghavan, R.V. and Tendolkar, G.S. (1958) Sintering of Thorium and Thoria. Proceedings of International Conference on Peaceful Uses of Atomic Energy, Geneva, 1-13 September 1958.
 
[12]Bichakal, S.S., Kini, V.S., Raghavan, R.V. and Garg, R.K. (1974) Preparation of Sinterable Grade Thoria Powder. Proceedings of the Indo-German Seminar on Utilization of Thorium, Bombay, 18-22 November 1974.
 
[13]Gurumurthy, K.R., Paibhale, S.V., Singh, S.P. and Raghavan, R.V. (1976) Fabrication of Thorium Shapes by Powder Metallurgy. Transactions of Powder Metallurgy Association of India, 3, 47-49.
 
[14]Rodriguez, P. and Sundaram, C.V. (1981) Nuclear and Materials Aspects of the Thorium Fuel Cycle. Journal of Nuclear Materials, 100, 227-249.
http://dx.doi.org/10.1016/0022-3115(81)90534-1
 
[15]Das, M. and Prasad, P.N. (1984) Thorium Dioxide Pellets for Reactor Fuel Elements. Specification PP-M-784.
 
[16]Chandramouli, V., Anthonysamy, S., Vasudeva Rao, P.R., Divakar, R. and Sudararaman, R. (1996) PVA Aided Microwave Synthesis: A Novel Route for the Production of Nanocrystalline Thoria Powder. Journal of Nuclear Materials, 231, 213-220.
http://dx.doi.org/10.1016/0022-3115(96)00368-6
 
[17]Joseph, K., Sridharan, R. and Gnanasekaran, T. (2000) Kinetics of Thermal Decomposition of Th(C2O4)2?6H2O. Journal of Nuclear Materials, 281, 129-139.
http://dx.doi.org/10.1016/S0022-3115(00)00241-5
 
[18]Purohit, R.D., Saha, S. and Tyagi, A.K. (2001) Nanocrystalline Thoria Powders via Glycine-Nitrate Combination. Journal of Nuclear Materials, 288, 7-10.
http://dx.doi.org/10.1016/S0022-3115(00)00717-0
 
[19]Ananthasivan, K., Anthonysamy, S., Sudha, C., Terrance, A.L.E. and Vasudeva Rao, P.R. (2002) Thoria Doped with Cations of Group VB—Synthesis and Sintering. Journal of Nuclear Materials, 300, 217-229.
http://dx.doi.org/10.1016/S0022-3115(01)00736-X
 
[20]Ananthasivan, K., Anthonysamy, S., Singh, A. and Vasudeva Rao, P.R. (2002) De-Agglomeration of Thorium Oxalate—A Method for the Synthesis of Sinter Active Thoria. Journal of Nuclear Materials, 306, 1-9.
http://dx.doi.org/10.1016/S0022-3115(02)01229-1
 
[21]Balakrishnan, K., Majumdar, S., Ramanujam, A. and Kakodkar, A. (2002) The Indian Perspective on Thorium Fuel Cycles. Thorium Fuel Cycle: Options and Trends, IAEA TECDOC-1319, 257-265.
 
[22]Dash, S., Singh, A., Ajikumar, P.K., Subramaniam, H., Rajalakshmi, M., Tyagi, A.K., Arora, A.K., Narasimhan, S.V. and Raj, B. (2002) Synthesis and Characterization of Nano Crystalline Thoria Obtained from Thermally Decomposed Thorium Carbonate. Journal of Nuclear Materials, 303, 156-168.
http://dx.doi.org/10.1016/S0022-3115(02)00816-4
 
[23]Kutty, T.R.G., Khan, K.B., Hegde, P.V., Banerjee, J., Sengupta, A.K., Majumdar, S. and Kamath, H.S. (2004) Development of a Master Sintering Curve for ThO2. Journal of Nuclear Materials, 327, 211-219.
http://dx.doi.org/10.1016/j.jnucmat.2004.02.007
 
[24]Sinha, S., Ramadasan, E., Jatha, V.P., Dasgupta, K., Sahoo, K.C. and Gantayet, L.M. (2007) Laser Etching of Thoria Pellets for Microstructural Investigations. Applied Science, 253, 4404-4408.
 
[25]Anantharaman, K., Shivakumar, V. and Saha, D. (2008) Utilization of Thorium in Reactors. Journal of Nuclear Materials, 383, 119-121.
http://dx.doi.org/10.1016/j.jnucmat.2008.08.042
 
[26]Banerjee, J., Kutty, T.R.G., Kumar, A., Kamath, H.S. and Banerjee S. (2011) Densification Behavior and Sintering Kinetics of ThO2-4%UO2 Pellet. Journal of Nuclear Materials, 408, 224-230.
http://dx.doi.org/10.1016/j.jnucmat.2010.11.029
 
[27]Banerjee, S. and Govindan Kutty, T.R. (2012) Functional Materials. Nuclear Fuels, 10, 387-466.
 
[28]Saller, H.A. and Keeler, J.R. (1953) The Fabrication of Thorium Tubes. BMI-805, Batelle Memorial Institute.
 
[29]Johnson, J.R. and Curtis, C.E. (1954) Properties of Thorium Oxide Ceramics. Interim Report ORNL 1809.
 
[30]Johnson, J.R. and Curtis, C.E. (1954) Note on Sintering of Thoria. Journal of the American Ceramic Society, 37, 611.
http://dx.doi.org/10.1111/j.1151-2916.1954.tb13996.x
 
[31]Beach, J.G. and Schaer, G.R. (1959) Electroplating on Thorium. Journal of the Electrochemical Society, 106, 392-393.
http://dx.doi.org/10.1149/1.2427366
 
[32]Harada, Y., Baskin, Y. and Handwerk, J.H. (1962) Calcination and Sintering Study of Thoria. American Ceramic Society, 45, 253-257.
http://dx.doi.org/10.1111/j.1151-2916.1962.tb11139.x
 
[33](1966) Utilization of Thorium in Power Reactors. Technical Reports Series No. 52, IAEA, Vienna.
 
[34]Matzke, H.J. (1967) Xenon Migration and Trapping in Doped ThO2. Journal of Nuclear Materials, 21, 190-198.
http://dx.doi.org/10.1016/0022-3115(67)90149-3
 
[35]Pope, J.M. and Radford, K.C. (1974) Physical Properties of Some Thoria Powders and Their Influence on Sinterability. Journal of Nuclear Materials, 52, 241-254.
http://dx.doi.org/10.1016/0022-3115(74)90171-8
 
[36]Weinreich, A.W., Britton, W.H., Hutchison, C.R., Johnson, R.G.R. and Burke, T.J. (1977) Fabrication of High Density, High Integrity Thorium Based Fuel Pellets. Transactions of the American Nuclear Society, 27, 305-307.
 
[37](1979) Status and Prospects of Thermal Breeders and Their Effect on Fuel Utilization, Technical Reports Series No. 195, IAEA, Vienna.
 
[38]White, G.D., Bray, L.A. and Hart, P.E. (1981) Optimization of Thorium Oxalate Precipitation Conditions Relative to Derived Oxide Sinterability. Journal of Nuclear Materials, 96, 305-313.
http://dx.doi.org/10.1016/0022-3115(81)90574-2
 
[39]Belle, J. and Berman, R.M. (1981) Thorium Dioxide—Properties and Nuclear Applications. DOE/NE-0060.
http://dx.doi.org/10.2172/5986642
 
[40](1987) Utilization of Thorium-Based Nuclear Fuel: Current Status and Perspectives. Proceedings of TCM, IAEA-TECDOC-412, IAEA, Vienna.
 
[41]Tetsuo Shiratori, K. and Fukuda, K. (1993) Fabrication of Very High Density Fuel Pellets of Thorium Dioxide. Journal of Nuclear Materials, 202, 98-103.
http://dx.doi.org/10.1016/0022-3115(93)90033-U
 
[42]Altas, Y., Eral, M. and Tel, H. (1997) Preparation of Homogeneous (Th0.8U0.2)O2 Pellets via Coprecipitation of (Th,U)(C2O4)2?nH2O Powders. Journal of Nuclear Materials, 249, 46-51.
http://dx.doi.org/10.1016/S0022-3115(97)00185-2
 
[43](2000) IAEA-TECDOC-1155. IAEA, Vienna.
 
[44](2002) IAEA-TECDOC-1319. IAEA, Vienna.
 
[45]MacDonald, P.E. (2002) Advanced Proliferation Resistant, Lower Cost, Uranium—Thorium Dioxide Fuels for Light Water Reactors, Idaho National Engineering and Environmental Laboratory INEEL/EXT-02-01411.
 
[46]IAEA (2005) Thorium Fuel Cycle—Potential Benefits and Challenges. IAEA, Vienna.
 
[47]Grosse, K.-H., Hrovat, M. and Seemann, R. (2009) Manufacturing Technology for Thorium Based Fuel Elements. Proceedings of Conference on Characterization and Quality Control of Nuclear Fuels, Hyderabad, 18-20 February 2009.
 
[48]Hingant, N., Clavier, N., Dacheux, N., Barre, N., Hubert, S., Obbade, S., Taborda, F. and Abraham, F. (2009) Preparation, Sintering and Leaching of Optimized Uranium Thorium Dioxides. Journal of Nuclear Materials, 385, 400-406.
http://dx.doi.org/10.1016/j.jnucmat.2008.12.011
 
[49]Hingant, N., Clavier, N., Dacheux, N., Hubert, S., Barré, N., Podor, R. and Aranda, L. (2011) Preparation of Morphology Controlled Th(1?x)UxO2 Sintered Pellets from Low Temperature Precursors. Powder Technology, 208, 454-460.
http://dx.doi.org/10.1016/j.powtec.2010.08.042
 
[50](2012) Role of Thorium to Supplement Fuel Cycles of Future Nuclear Energy Systems. STI/PUB/1540, IAEA, Vienna.
 
[51]Csom, Gy., Reiss, T., Fehér, S. and Czifrus, Sz. (2012) Thorium. Annals of Nuclear Energy, 41, 67-78.
 
[52]Das, D. and Bharadwaj, S.R. (2013) Thoria Based Nuclear Fuels: Thermophysical and Thermodynamic Properties, Fabrication, Reprocessing and Waste Management. Google eBook: Business & Economics Springer Science & Business Media.
 
[53]Balakrishnan, M.R. (1992) India Prepares for Its First Load of Thorium Fuel. Nuclear Engineering International, 37, 14.
 
[54]Balakrishna, P. and Mahapatra, S. (1973) Electroless Copper on Alumina and Other Substrates. Plating, 60, 636-639.
 
[55]Balakrishna, P., Murty, B.N., Jha, S.K., Krishnan, P.K. and Saibaba, N. (2005) Electroplating of Copper on Annular Zirconium Alloy Billets. Plating and Surface Finishing, 92, 56-61.
 
[56]Dini, J.W. and Johnson, H.R. (1980) Plating on Some Difficult to Plate Metals and Alloys. SAND 79-8069, Sandia Laboratories.
 
[57]Peterson, S., Adams, R.E. and Douglas Jr., D.A. (1965) Properties of Thorium, Its Alloys and Its Compounds. ORNL-TM-1144.
http://web.ornl.gov/info/reports/1965/3445601336962.pdf
 
[58]Burke, J.E., Lay, K.W. and Prochazka, S. (1980) The Effect of MgO on the Mobility of Grain Boundaries and Pores in Aluminum Oxide. In: Kuczynski, G.C., Ed., Sintering Processes, Plenum Press, London.
 
[59]Zawidzki, T.W., Apte, P.S. and Hoare, M.R. (1984) Effect of Sulphur on Grain Growth in UO2 Pellets. Journal of the American Ceramic Society, 67, 361-364.
http://dx.doi.org/10.1111/j.1151-2916.1984.tb19537.x                                                      eww150109lx
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