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<p>In the present paper, we use computational simulation to investigate the response of self-powered neutron detectors (SPNDs) to changes in the coolant flow rate of the measured fuel assembly (FA). A&#xa0;model problem of reducing the coolant flow rate in several measured FAs is considered. Their response is assessed, including the difference in the SPND current before and after introducing a&#xa0;disturbance caused by a&#xa0;decrease in the flow rate through the FA. In some cases, readings of in-core monitoring system SPNDs can be used to diagnose a&#xa0;decrease in the flow rate through the FA.</p>

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Effects of changes in the coolant flow rate of the VVER reactor to the response from the self-powered neutron detectors of the in-core monitoring system: simulation of transient modes in the PRIM-AES software package

  • 期刊论文

  • 发表日期：

    2025年8月21日

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  • D. A. Gornostaev,
  • A. Yu. Kurchenkov,
  • A. M. Musikhin,
  • Yu. M. Semchenkov

摘要

In the present paper, we use computational simulation to investigate the response of self-powered neutron detectors (SPNDs) to changes in the coolant flow rate of the measured fuel assembly (FA). A model problem of reducing the coolant flow rate in several measured FAs is considered. Their response is assessed, including the difference in the SPND current before and after introducing a disturbance caused by a decrease in the flow rate through the FA. In some cases, readings of in-core monitoring system SPNDs can be used to diagnose a decrease in the flow rate through the FA.