Reactor measuring meter system

Abstract

A reactor measuring instrument system does not need a mobile measuring device, can omit a mechanically driven operating device, can simplify the structure, and avoid or reduce the exposure of operators to radiation conditions. It has: a plurality of in-core instrumentation assemblies arranged in the gap between a plurality of fuel assemblies installed in the nuclear reactor core, the above assemblies including: a fixed neutron detector assembly, which is in A plurality of fixed neutron detectors are dispersedly arranged in the axial direction of the core; and a fixed gamma thermometer, which is arranged with a plurality of fixed gamma rays at least at the same axial position of the core as the fixed neutron detectors A fever detector that also has: a power section detector signal processing unit connected to the stationary neutron detector assembly by a signal cable; and a gamma thermometer signal processing unit connected to the stationary gamma thermometer by a signal cable .

Description

technical field [0001] The present invention relates to an atomic reactor output distribution monitoring system that uses a physical model to calculate the output distribution of the nuclear reactor based on the status data of the nuclear reactor core, and in particular relates to the use of multiple fixed neutron detection devices and fixed γ A ray heating detection device, a highly reliable nuclear reactor measuring instrument system for accurately calculating the core output distribution with high precision, a nuclear reactor output distribution monitoring system having the system, and an output distribution monitoring method thereof. Background technique [0002] In an atomic reactor, such as a boiling water type atomic reactor, core performance such as output distribution and thermal state of the core is monitored by a process control computer provided in a reactor output distribution monitoring system. [0003] The method of the core output distribution and thermal sta...

AI Technical Summary

Problems solved by technology

In the past reactor instrumentation system, there is a problem: in order to precisely monitor the output distribution in the axial direction of the core, there must be a mobile neutron detector 10 or a gamma ray heating detector 10A, when there is only a fixed neutron detector It is difficult to precisely monitor the axial output distribution of the core when the

However, the 3-dimensional nuclear thermal model installed in the process control computer in the past is not used for processing. Therefore, although in the nuclear reactor output distribution calculation device 18, the core axis is calculated by learning the reading value of the moving detector The error generated by the output distribution calculation is corrected. However, if a fixed detector is used instead of a mobile detector, the disadvantage is that the correction information cannot be obtained, and the output of the node part where the fuel separator is installed is corrected. large errors in evaluation

However, in the reactor measuring instrument system, there is insufficient knowledge and experience in the analysis of the range of gamma-ray heating and the knowledge and experience of gamma-ray heating. Therefore, it is difficult to accurately and precisely detect the gamma-ray calorific value of the upper and lower ends of the effective part of the fuel

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