Conference Proceedings Paper
MEASUREMENT AND ANALYSIS FOR DETERMINATION OF POWER COEFFICIENT OF REACTIVITY OF AN OPERATING CANDU6
35th Annual CNS Conference - 2015 May 31 - June 3
J. Kim (Korea Advanced Institute of Science and Technology)
Y. Kim (Department of Nuclear and Quantum Engineering, KAIST)
K. Kim (Korea Hydro & Nuclear Power Co.)
The power coefficient of reactivity (PCR) needs to be negative to achieve the inherent safety of a reactor, but the PCR of CANDU-6 has been evaluated to be positive in recent studies. In this circumstances, an experiment was performed at a CANDU-6 reactor in Korea to measure the PCR of CANDU-6. Based on the measurement data, the PCR was evaluated by a newly proposed methodology which requires several estimations of reactivity variation due to liquid zone controllers, xenon, etc. Consequently, the PCR of CANDU-6 was evaluated to be about 0.5 pcm/%Power which is slightly smaller than the latest official value, 1.7 pcm/%Power.
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