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首页> 外文期刊>IEEE Transactions on Nuclear Science >Instrument failure detection and reconstruction methodology in space-time nuclear reactor dynamic systems with fixed in-core detectors
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Instrument failure detection and reconstruction methodology in space-time nuclear reactor dynamic systems with fixed in-core detectors

机译：带有固定核内探测器的时空核反应堆动态系统中的仪器故障检测和重建方法

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摘要

The detection and isolation of instrument failures in nuclear reactors equipped with fixed in-core detectors were studied in order to improve reliability and safety. This was done by representing the reactor as a linear stochastic distributed parameter system. A bank of detection observers based on the Kalman filter concept was constructed in order to isolate component failures via robust observation. Each observer was sensitive to only one specified component failure. This was done to minimize the covariance matrix error. However, because observed deviations may be attributed to changes in system behavior, failure decisions are confirmed by a multiple consecutive miscomparison (MCM) counter. Following failure detection, the failed sensor's output is replaced with an estimate from the failure-free filter. Various simulations were performed to verify this failure detection method as applied to reactor instrument failures. It was demonstrated that the method can detect both single- and common-mode failures. Also, without hardware redundancy, it can describe the system dynamics in the event of failures.
机译：为了提高可靠性和安全性，研究了配备固定堆芯探测器的核反应堆中仪器故障的检测和隔离。这通过将反应堆表示为线性随机分布参数系统来完成。构造了基于卡尔曼滤波器概念的一组检测观察者，以便通过可靠的观察来隔离组件故障。每个观察者仅对一个指定的组件故障敏感。这样做是为了使协方差矩阵误差最小。但是，由于观察到的偏差可能归因于系统行为的变化，因此故障判定由多个连续的误比较（MCM）计数器确认。故障检测之后，将故障传感器的输出替换为无故障滤波器的估计值。进行了各种模拟，以验证这种故障检测方法适用于反应堆仪器故障。证明了该方法可以检测单模和共模故障。同样，在没有硬件冗余的情况下，它可以描述发生故障时的系统动态。

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