Improve the accuracy of the power distribution reconstruction using power distributions of different status as the fundamental harmonic

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20211910321888
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(1) Institute of Nuclear and New Energy Technology, Tsinghua University, The Key Laboratory of Advanced Reactor Engineering and Safety, Ministry of Education, Beijing; 100084, China | 1600年 / Japan Atomic Energy Agency, JAEA期
关键词：
Modular high temperature gas cooled reactor HTR-PM demonstration plant; designed by INET; Tsinghua University; is being built in Shidaowan; Shandong province; China. HTR-PM adopts pebble bed concept. Like other HTR; to measure or monitor the core power distribution is very important but challenging for HTR-PM; as there is no in-core neutron detectors. There are some proposals to reconstruct the power distribution from the readings of ex-core neutron detectors. One method is harmonic synthesis method. In this paper; improved harmonic synthesis method is proposed and tested to increase the accuracy of the power distribution reconstruction; by using better fundamental harmonic according to different reactor operation conditions. The numerical result shows the improvement in the reconstruction accuracy; contrasting to harmonics' coefficients polynomial expansion method. © 2014 Westinghouse Electric Company LLC. All Rights Reserved;
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167626
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