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Stability analysis of the Ghana Research Reactor-1 (GHARR-1)
Ghana Atomic Energy Commission. (National Nuclear Research Institute)
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy. (Nuclear Reactions)
Ghana Atomic Energy Commission. (National Nuclear Research Institute)
Ghana Atomic Energy Commission. (National Nuclear Research Institute)
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2013 (English)In: Energy Conversion and Management, ISSN 0196-8904, Vol. 74, 587-593 p.Article in journal (Refereed) Published
Abstract [en]

A theoretical model has been developed to study the stability of the Ghana Research Reactor one(GHARR-1). The closed-loop transfer function of GHARR-1 was established based on the model, which involved the neutronics and the thermal hydraulics transfer functions. The reactor kinetics was described by the point kinetics model for a single group of delayed neutrons, whilst the thermal hydraulics transfer function was based on the modified lumped parameter concept. The inherent internal feedback effect due to the fuel and the coolant was represented by the fuel temperature coefficient and the moderator temperature coefficient respectively. A computer code, RESA (REactor Stability Analysis), entirely in Java was developed based on the model for systems analysis. Stability analysis of the open-loop transfer function of GHARR-1 based on the Nyquist criterion and Bode diagrams using RESA, has shown that the closed loop transfer function was marginally stable for variable operating power levels. The relative stability margins of GHARR-1 were also identified.

Place, publisher, year, edition, pages
Elsevier, 2013. Vol. 74, 587-593 p.
Keyword [en]
Nyquist criterion, Bode plots, Transfer function, RESA, Lumped parameter concept
National Category
Other Physics Topics
Research subject
Applied Nuclear Physics
URN: urn:nbn:se:uu:diva-208444DOI: 10.1016/j.enconman.2013.03.039ISI: 000325302700063OAI: diva2:652762
Available from: 2013-10-01 Created: 2013-10-01 Last updated: 2013-11-19Bibliographically approved

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Alhassan, Erwin
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