Dynamic rod carving method utilizing power measuring range detector and taking signal as signal source

A technology of power range and dynamic rod marking, which is applied in the field of nuclear reactor physical tests, can solve problems such as troubles and accidental shutdown of the reactor, and achieve the effects of strong measured current, high signal-to-noise ratio, and avoidance of accidental shutdown

Active Publication Date: 2016-03-30
CNNC NUCLEAR POWER OPERATION MANAGEMENT +1
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Problems solved by technology

This approach may be beneficial from the perspective of ensuring that the reactivity instrument and the external nuclear testing system share a physical ground, but switching the high-voltage

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  • Dynamic rod carving method utilizing power measuring range detector and taking signal as signal source
  • Dynamic rod carving method utilizing power measuring range detector and taking signal as signal source
  • Dynamic rod carving method utilizing power measuring range detector and taking signal as signal source

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Embodiment Construction

[0053] see figure 1 . 1 is the reactor body, and 2 is the power range detector. It can be seen that detectors with four channels are evenly arranged outside the reactor.

[0054] see figure 2 . In the prior art, the power range detector 2 of one channel includes six detectors, respectively 21~26, wherein the sum of the currents of 21~23 is output as the lower current signal, and the sum of the currents of 24~26 is used as the upper current The signal outputs are respectively corrected by the static correction factor, then normalized and summed, and then calculated.

[0055] see image 3 . In the present invention, the power range detector 2 of one channel also includes six detectors 21-26, and the sum of all currents is output as a current signal, which is calculated after being corrected by a static correction factor.

[0056] see Figure 4 to Figure 7 , is an example of the value scale test of a certain group of control rods in a nuclear power plant according to the...

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Abstract

The invention discloses a dynamic rod carving method utilizing a power measuring range detector and taking a signal as a signal source. The dynamic rod carving method comprises the following steps: by using an existing signal terminal in a main control room of a power plant, recording a sum signal of current of all detectors of one channel of an out-reactor power measuring range which is continuously changed along the position of a control rod in a whole-group reactor core inserting process of a certain control rod group; inputting the signal into a reactivity instrument; and after revising static and dynamic revising factors, obtaining a measurement value of reactivity so as to finish rod carving. With the adoption of the dynamic rod carving method, an existing out-reactor nuclear measurement system of a nuclear power plant does not need to be subjected to any hardware modification and the rod carving can be finished without changing a power supply manner of the nuclear measurement system in a testing process.

Description

technical field [0001] The invention belongs to the field of nuclear reactor physical test methods, in particular to a dynamic rod marking method using the sum signal of multi-section detectors with the same channel and the same channel outside the nuclear reactor power range as a signal source. Background technique [0002] At present, the mainstream pressurized water reactor nuclear power plants carry out fuel replacement operations in batches. Generally, every one year or one and a half years, the most fully "burned" nuclear fuel in the nuclear reactor will be unloaded from the core, and a corresponding amount of new fuel will be released at the same time. Components are loaded into the reactor. Due to the differences in the physical properties of new and old fuels, nuclear power plants often need to entrust a qualified nuclear engineering design institute to design a new nuclear fuel loading scheme before each fuel replacement operation. [0003] After the nuclear power...

Claims

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Application Information

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IPC IPC(8): G21C17/10
CPCG21C17/10Y02E30/30
Inventor 廖泽军叶国栋代前进张少泓潘泽飞王涛蒋校丰焦健李文涛邹森詹勇杰
Owner CNNC NUCLEAR POWER OPERATION MANAGEMENT
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