The National Nuclear Research Institute of the Ghana Atomic Energy Commission is undertaking steps to convert the Ghana Research Reactor-1 from HEU Core to LEU. The proposed LEU core consists of 12.5% enriched UO2 fuel elements clad in Zircaloy-4 alloy. This is done in collaboration with Reduced Enrichment for Research and Test Reactor. The versatile MCNP code was used to analyse the neutronics parameters given in the SAR of HEU core, thereby characterizing the core. Subsequently, the LEU core was indentified with necessary changes to the HEU MCNP model. It was ascertained that the reactivity for the LEU core with the same number of fuel pins as the HEU was inadequate, hence the fuel pins were increased from 344 to 348. The neutron flux at the irradiation sites was found to be below the nominal value at full power for the LEU and hence the nominal power was increased to 34 kW for a nominal flux value of 1 × 1012 n/cm2.s. The parameters investigated for the HEU and LEU are shown in this paper.
Cite this paper
H. Odoi, E. Akaho, S. Jonah, R. Abrefah and V. Ibrahim, "Study of Criticality Safety and Neutronic Performance for a 348-Fuel-Pin Ghana Research Reactor-1 LEU Core Using MCNP Code," World Journal of Nuclear Science and Technology
, Vol. 4 No. 1, 2014, pp. 46-52. doi: 10.4236/wjnst.2014.41008
 International Atomic Energy Agency, “Research Reactors Database,” 2013. http://nucleus.iaea.org/RRDB/RR/ReactorSearch.aspx?filter=0
 International Atomic Energy Agency Information Circular , “Project and Supply Agreement,” INCIRC/468, April, 1995.
 E. H. K. Akaho, B. T. Maaku, S. Anim-Sampong, L. Yizheng and Z. Wuqin, “On-Site Critical and Zero Power Experiments for Start-up of GHARR-1,” GAEC-NNRIRT-22, Kwabenya, Ghana, 1995.
 E. Ampomah-Amoako et al., “Storage and Transport of Spent Fuel from Ghana Research Reactor-1 for conversion from HEU to LEU,” 32nd International Meeting on Reduce Enrichment for Research and Test Reactors, Lisbon, 10-14 October 2010.http://www.rertr.anl.gov/RERTR32/index.shtml
 W. L. Woodruff, “Evaluation and Selection of Hot Channel (Peaking) Factors for Research Reactors Applicaiton,” CONF-8709189-2, Intl Mtg. Reduced Enrichment for Research and Test Reactors (RERTR), Buenos Aires, September 1987.
 W. Gudowski, “Monte Carlo Methods for Accelerator-Driven Systems (SMR/1326-8),” Workshop on Hybrid Nuclear Systems for Energy Production, Utilization of Actnides and Transmutation of Long-Lived Radioactive Waste, Trieste, 3-7 September 2001.
 J. F. Briesmeister, “MCNP—A General Monte Carlo NParticle Transport Code,” Version 4C-LA-13709.2000 7.
 R. G. Abrefah, H. C. Odoi, E. Ampomah-Amoako and E. Mensimah, “Investigation into the Effects of Zircaloy-4 on the Neutronics of Low Enriched Uranium MNSR Core,” Progress in Nuclear Energy, Vol. 54, No. 1, 2012, pp. 5-10. www.elsevier.com/locate/pnucene
 H. C. Odoi, et al., “Investigative Studies on Effect of Reflector Thickness on the Performance of Low Enriched Uranium-Fuelled MNSRs,” Nuclear Engineering and Design, Vol. 241, No. 8, 2011, pp. 2909-2915. www.elsevier.com/locate/nucengdes
 Y. V. Ibrahim, H. C. Odoi, R. L. Njinga, M. O. Odeleye and S. A. Jonah, “Monte Carlo Simulation of Additional Safety Control Rod for Commercial MNSR to Enhance safety,” Annals of Nuclear Energy, Vol. 44, 2012, pp. 71-75. www.elsevier.com/locate/anucene
 J. Duderstadt and L. J. Hamilton, “Nuclear Reactor Physics,” John Wiley and Sons Inc., Hoboken, 1976.
 G. Chenzhan, “The Effect of Xenon Poisoning on MNSR Operation,” 1991.
 E. H. K. Akaho, S. Anim-Sampong, G. Emi-Reynolds, D. N. A. Dodoo-Amoo and T. B. Maaku, “Safety Analysis Report for Ghana Research Reactor-1,” GEAC-NNRIRT-26, March 1995.