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Dynamic reactivity measurement method based on multi-detector measurement signals

A technology for reactive measurement and signal measurement, applied to instruments, special data processing applications, design optimization/simulation, etc., to achieve the effect of improving accuracy and reliability and reducing space effect errors

Active Publication Date: 2019-01-01
NUCLEAR POWER INSTITUTE OF CHINA
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Problems solved by technology

However, there are few foreign studies on dynamic reactivity measurement based on multi-detector measurement signals.
[0007] However, some research institutes in China have carried out correction calculation research based on three-dimensional physical analysis for dynamic rod marking technology, and some research institutions have conducted correction research on the reactivity measurement process of single-detector inverse dynamic method, but there is no unit based on three-dimensional space-time dynamics. Scientific analysis, research on multi-detector measurement signal coupling method for dynamic reactivity measurement or application for related patent technology report

Method used

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  • Dynamic reactivity measurement method based on multi-detector measurement signals
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  • Dynamic reactivity measurement method based on multi-detector measurement signals

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Embodiment

[0038] A specific implementation process of a dynamic reactivity measurement method based on multi-detector measurement signals in this embodiment includes the following steps:

[0039] 1. Multi-detector measurement signal acquisition in the measurement process

[0040] Multiple neutron detectors are used to collect measurement signals at different positions inside or outside the pile.

[0041] Lift the control rods according to the rod lifting procedure to make the reactor reach the critical point, adjust the power of the reactor, and stabilize it at a certain level, so that the current level of the neutron detector outside the reactor meets the measurement requirements. or multiple beams) fall into the core, and simultaneously collect neutron signals and rod position signals of moving control rods.

[0042] 2. Measurement signal processing and coupling

[0043] Based on the three-dimensional spatio-temporal dynamics analysis, the actual measurement process is calculated an...

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Abstract

The invention discloses a dynamic reactivity measurement method based on a multi-detector measurement signal, the invention aims at the shortcomings of the existing single detector point reactor modeland establishes a reactor dynamic reactivity measurement method capable of eliminating the space effect error of the drop rod reactivity measurement of the point reactor model through the three-dimensional space-time dynamics analysis and the coupling analysis of the measurement signals of a plurality of detectors. In this method, physical parameters are calculated based on three-dimensional spatio-temporal dynamics analysis combined with three-dimensional physical model, and the measured signals of multi-detectors are coupled to be used for reactivity measurement, which improves the shortcomings of the original measurement method and improves the accuracy of dynamic reactivity measurement.

Description

technical field [0001] The invention relates to the field of reactor dynamic reactivity measurement, in particular to a dynamic reactivity measurement method based on multi-detector measurement signals. Background technique [0002] The dynamic reactivity measurement of the nuclear reactor core is mainly aimed at the measurement process of the integral value of the control rods, the subcriticality of the stuck rods, and the shutdown depth during the physical test. [0003] Commonly used reactivity measurement methods in nuclear power plants are: boron adjustment method, rod changing method and dynamic rod marking method. Among them, the boron adjustment method measures the micro and integral value of the control rod by adjusting the boron concentration, but the measurement time is long and the cost is high; the rod replacement method does not require boron adjustment, takes a little less time, and can measure the integral value of the control rod; the dynamic engraved rod me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20G06F2119/06
Inventor 牛江汪文聪黄礼渊闫晓吴明昌阳林锋何杰
Owner NUCLEAR POWER INSTITUTE OF CHINA
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