A NEW 3D REACTOR MODEL FOR CRITICALITY SAFETY ANALYSIS OF NIRR-1 USING SCALE 6.2.3

Authors

  • Abdulhameed Salawa

Keywords:

k-effective, neutronics, fission, absorption, thermal, leakage, control

Abstract

Detailed 3D model was developed for the Nigeria Research Reactor (NIRR-1) recently converted to 12.5% enriched UO2 core during the last quarter of 2018. The KENO3D module of SCALE 6.2.3 was used to visualize the geometry of the system before the criticality safety analysis was performed with the KENO-VI module of the code.  This model consists of over 10 different units that are properly placed at their exact position on the global unit. The coordinate of each fuel pin was calculated using the radius of the circle and the pin angular positions. Several reactor physics parameters generated include k-effective values by generation run, the average k-effective, the neutron lifetime, the generation time, the average number of neutron per fission in the system, the average energy group at which fission occurs, and the energy of the average lethargy causing fission in the system. Some of this information was used to determine how fast or thermal the spectrum of the modeled system was. A plot of average k-effective versus the number of generation run was used to determine whether the calculations performed using the input prepared for the modeled NIRR-1 system has source convergence difficulties or not.

References

Ajibade, A.C. (1982): The origin of the Older Granites of Nigeria, some evidence from the Zungeru region. Nigerian Journal of Mineralization Geology, 19(1), 223–230.

Ajibade, A.C. and Woakes, M. (1976): Proterozoic crustal development in the Pan-African Regime of Nigeria, In: C.A. Kogbe (Editor) Geology of Nigeria; Published by Rock View (Nigeria.) Ltd., 57–63.

Blyth, K.T. and Freitas, G.P. (1988): Behaviour of Foundation and Structures’, in proceedings of the 9th International Conference of Soil Mechanics, Tokyo, Session 2, 8-10.

Gomes, N. (2006): Access to Water, Pastoral Resource Management and Pastoralists’ Livelihoods; Lessons Learned From Water Development in Selected Areas of Eastern Africa (Kenya, Ethiopia and Somalia); In NATIONS, Food And Agriculture Organization Of The United Nations (F. A. A. O. O. T. U. N). Livelihood Support Programme Working Paper 26, Access to Natural Resources Sub-Programme.

Kogbe, C. A., (1976): Geology of Nigeria (2nd Revised Edition). Rockview Publishing Company, Jos, Nigeria, 531–538.

McCurry, P. (1976): The Geology of the Precambrian to Lower Palaeozoic rocks of Northern

Nigeria-a review in: C.A. Kogbe (Editor), Geology of Nigeria. Elizebethan Publishing Company, Lagos, 15–39.

Obaje, N.G., Lar, U.A., Nzegbuna, A.I., Moumouni, A., Chaanda, M.S. and Goki, N.G. (2006): Geology and Mineral Resources of Nasarawa State, an investor Guide. Elizabethan Publishers, Lagos, 21-34.

Offodile, M.E. (1992): An Approach to Groundwater Study and Development in Nigeria. Mecon Services Ltd., Jos, Nigeria, 224-236.

Olarewaju, V.O., Olorunfemi, M.O. and Alade, O., (1996): Chemical Charateristicts of Groundwater from some Parts of the Basement Complex of Central Nigeria. Journal of Mineralization Geology, 33 (2), 135-139.

Olasehinde, P. I., (1999): An Integrated Geological and Geophysical Exploration Technique for Groundwater in the Basement Complex of West Central Part of Nigeria. Journal of National Association of Hydrogeologist (Water Resources), 10 (1), 46-49.

Omoyoloye, N.A., Oladipo, M.I. and Adeoye, O.O. (2008): ‘Engineering Geophysical Study of Adagbakuja Newton Development, Southwestern Nigeria. Medwell Online Journal of Earth Science, 2(2), 55-63.

Rahaman, M.A. (1988): Recent Advance in the study of the Basement Complex of Nigeria, Symposium on the geology of the Basement Complex of Nigeria, Obafemi Awolowo University, Ile-Ife, Nigeria (doi:1016/0899-5362(91)90102-5), 7(2), 223-228.

Telford,W.M., Geldart, L.P., Sheriff, R.E. and Keys, D.A., (1976): Applied Geophysics. Cambridge University Press, London, 620 - 623.

Worthington, P.F., (1977): Geophysical Investigation of Groundwater Resources in the Kalahari Basin, Geophysics, 42, 838 – 849.

Published

2020-04-14

How to Cite

Salawa, A. (2020). A NEW 3D REACTOR MODEL FOR CRITICALITY SAFETY ANALYSIS OF NIRR-1 USING SCALE 6.2.3. FUDMA JOURNAL OF SCIENCES, 4(1), 406 - 415. Retrieved from https://fjs.fudutsinma.edu.ng/index.php/fjs/article/view/61