Analysis of Nigeria Research Reactor-1 Thermal Power Calibration Methods

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• 作者：Sunday Arome Agbo^a ; ^{sundayagbo131@yahoo.com" class="auth_mail" title="E-mail the corresponding author} ; Yusuf Aminu Ahmed^b ; Ita Okon Bassey Ewa^b ; Yahaya Jibrin^a
• 关键词：Heat Balance ; Miniature Neutron Source Reactor ; Nuclear Research Reactor ; Slope ; Temperature ; Thermal Hydraulic
• 刊名：Nuclear Engineering and Technology
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：48
• 期：3
• 页码：673-683
• 全文大小：1235 K

文摘

This paper analyzes the accuracy of the methods used in calibrating the thermal power of Nigeria Research Reactor-1 (NIRR-1), a low-power miniature neutron source reactor located at the Centre for Energy Research and Training, Ahmadu Bello University, Zaria, Nigeria. The calibration was performed at three different power levels: low power (3.6 kW), half power (15 kW), and full power (30 kW). Two methods were used in the calibration, namely, slope and heat balance methods. The thermal power obtained by the heat balance method at low power, half power, and full power was 3.7 ± 0.2 kW, 15.2 ± 1.2 kW, and 30.7 ± 2.5 kW, respectively. The thermal power obtained by the slope method at half power and full power was 15.8 ± 0.7 kW and 30.2 ± 1.5 kW, respectively. It was observed that the slope method is more accurate with deviations of 4% and 5% for calibrations at half and full power, respectively, although the linear fit (slope method) on average temperature-rising rates during the thermal power calibration procedure at low power (3.6 kW) is not fitting. As such, the slope method of power calibration is not suitable at lower power for NIRR-1.