A Method for Diagnosing Reactor Neutron Detector Failure

A technology of neutron detectors and detectors, which is applied in the field of nuclear reactor core operation and safety, can solve problems such as the inability to detect detector failures, and achieve the effect of short diagnosis time and rapid diagnosis

Active Publication Date: 2017-08-25
XI AN JIAOTONG UNIV
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Problems solved by technology

At present, for the on-line monitoring system of the core power distribution, the measured value of the detector is used as its input signal. Other types of failures detected in detectors

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  • A Method for Diagnosing Reactor Neutron Detector Failure
  • A Method for Diagnosing Reactor Neutron Detector Failure
  • A Method for Diagnosing Reactor Neutron Detector Failure

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Embodiment Construction

[0030] The flow chart of detector failure diagnosis is as follows: figure 1 shown. As shown in the figure, the diagnosis process of detector failure not only occurs before the on-line monitoring and calculation of the core power distribution, but also directly judges the measured values ​​of the detectors and compares the measured values ​​to provide reliable input signals for on-line monitoring; it also occurs on-line In the process of monitoring calculation, that is, the comparison between the measured value and the reconstructed value, the detector failure diagnosis and the online reconstruction power distribution calculation are iteratively carried out. The connection makes the detector failure diagnosis have the function of distinguishing the detector failure from the local power oscillation of the core.

[0031] The specific implementation methods include the following aspects:

[0032] 1. Read the geometric dimensions of the reactor core, the layout of the core materi...

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Abstract

A method for diagnosing the failure of neutron detectors in reactors. The failure diagnosis is carried out in three stages through the direct comparison method of detector measurement values, the comparison method between measurement values, and the comparison method of measurement values ​​and response reconstruction values. The combined use of the three judgment methods makes the detector failure diagnosis method described in the present invention not only effectively diagnose the complete failure of the detector, but also accurately diagnose the failure of the detector measurement value deviating from the normal value, and has the ability to distinguish The ability of detector failure and local power oscillation; by removing the measured value of the failed detector, it is ensured that the on-line monitoring system of the core power distribution does not use the measured value of the faulted detector, providing reliable input parameters for the on-line monitoring system; the detector failure diagnosis in the present invention The method is not limited by the type of detector, the online monitoring method, and the type of detector failure. The failure diagnosis takes a short time, the diagnosis is rapid, and the diagnosis result is accurate and reliable.

Description

technical field [0001] The invention relates to the technical field of nuclear reactor core operation and safety, in particular to a method for diagnosing the failure of a reactor neutron detector. Background technique [0002] In order to ensure the safety of the reactor core and improve the economic benefits of the reactor, it is necessary to monitor the power distribution of the reactor core online. That is, continuous monitoring of reactor power distribution in time and space. Because the power distribution is not easy to monitor directly, nuclear power plants generally monitor the power distribution in the reactor indirectly by monitoring the neutron flux density in the core. [0003] Most reactors are equipped with in-core neutron measurement systems (in-core fixed detectors or movable detectors) to monitor the neutron flux density in the reactor; detector) to monitor the neutron flux in the reactor. Compared with the characteristics of fewer measuring points of det...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C17/00G21C17/04G21C17/10G21C17/108
CPCG21C17/00G21C17/047G21C17/10G21C17/108Y02E30/30
Inventor 吴宏春李茁曹良志郑友琦
Owner XI AN JIAOTONG UNIV
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