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An online detection device for nuclear power plant fuel assembly damage

A fuel assembly and detection device technology, which is applied in the field of nuclear power, can solve the problems of fuel assembly damage, large influence of data environmental factors, and easy leakage of gas sample radioactivity level, so as to achieve accurate damage judgment, improve detection lower limit, and reduce background horizontal effect

Active Publication Date: 2022-03-01
NUCLEAR POWER INSTITUTE OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the existing on-line detection devices for nuclear power plant fuel assemblies have two common shortcomings: the radioactive background data used for judgment and calculation are greatly affected by environmental factors; Missed judgment occurs, the purpose is to provide an online detection device for nuclear power plant fuel assembly damage to solve the above problems

Method used

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  • An online detection device for nuclear power plant fuel assembly damage
  • An online detection device for nuclear power plant fuel assembly damage

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Experimental program
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Effect test

Embodiment 1

[0027] Such as figure 1 As shown, an on-line detection device for nuclear power plant fuel assembly damage of the present invention includes a gas sampling chamber 1, a gamma radiation detector 2, a beta radiation detector 3, an air extraction device 11, an air suction device 12 and a nuclear data processing device 13; The gamma radiation detector 2 and the beta radiation detector 3 are arranged on the gas sampling chamber 1, and the gamma radiation detector 2 detects the gamma ray particles in the gas sampling chamber 1, and the beta radiation detector 3 detects the beta radiation particles in the gas sampling chamber 1 Ray particles; the gamma radiation detector 2 and the beta radiation detector 3 are connected to the nuclear data processing device 13, and the gamma radiation detector 2 and the beta radiation detector 3 send the collected data to the nuclear data processing device 13; the The air extraction device 11 is communicated with the gas sampling chamber 1, and the a...

Embodiment 2

[0030] In this embodiment, on the basis of Embodiment 1, the air extraction device 11 includes an air inlet, a negative pressure generating unit 8 and an exhaust port connected in sequence, and the negative pressure generating unit 8 is connected to the gas sampling chamber 1 and is connected to the gas sampling chamber 1. A negative pressure is generated in the sampling chamber 1 .

[0031] During the implementation of this embodiment, the negative pressure generating unit 8 provides negative pressure in the gas sampling chamber 1, and the air suction device 12 sucks the gas of the fuel assembly; Unit 8 is discharged.

Embodiment 3

[0033] In this embodiment, on the basis of Embodiment 1, the suction device 12 includes a gas pretreatment unit 5, a suction port, and a suction sleeve 9 connected in sequence; the suction sleeve 9 collects the gas of the fuel assembly 10 The gas of the fuel assembly 10 is pretreated by the gas pretreatment unit 5 and then enters the gas sampling chamber 1 .

[0034]During the implementation of this embodiment, the gas of the fuel assembly 10 is collected by the sip sleeve 9, and enters the gas pretreatment unit 5 through the suction port, and the gas pretreatment unit 5 performs pretreatment such as drying on the gas and then transports it to the gas sampling chamber 1. Through the cooperation of the aspirating device 12 and the aspirating device 11, the continuous detection of the gas of the fuel assembly 10 is realized.

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Abstract

The invention discloses an online detection device for nuclear power plant fuel assembly damage, which comprises a gas sampling chamber, a gamma radiation detector, a beta radiation detector, an air extraction device, an air suction device and a nuclear data processing device; the gamma radiation detector and the beta radiation detector The radiation detector is arranged on the gas sampling chamber, and the gamma radiation detector detects the gamma ray particles in the gas sampling chamber, and the beta radiation detector detects the beta ray particles in the gas sampling chamber. The present invention is an online detection device for nuclear power plant fuel assembly damage, and proposes an online sipping detection device for nuclear power plant fuel assembly damage based on radioactivity measurement β-γ coincidence technology, and uses the correlation of β-γ rays to reduce the background of the device to environmental factors Therefore, the lower detection limit of the device can be improved, thereby ensuring that the device can accurately determine whether the fuel assembly is damaged even at a low radioactivity level, and improve the accuracy of detection.

Description

technical field [0001] The invention relates to the technical field of nuclear power, in particular to an online detection device for nuclear power plant fuel assembly damage. Background technique [0002] The on-line sipping detection device for nuclear power plant fuel assembly damage is a test device used to qualitatively detect whether the fuel assembly is damaged. The test device currently in use has two detection principles, one of which is equipped with a gamma radiation detector. The γ-ray energy spectrum analysis of the gas sample determines the intensity of the characteristic radionuclide in the sample, and then judges whether the fuel element is damaged according to the ratio of the intensity to the background intensity per unit time; another type of equipment is equipped with a β radiation detector, through The intensity measurement of the β-ray of the gas sample determines the intensity of the characteristic radionuclide in the sample, and then judges whether th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C17/06G21C17/10
CPCG21C17/06G21C17/102Y02E30/30
Inventor 曾勇谷明非江山郭斌付勋如李杰
Owner NUCLEAR POWER INSTITUTE OF CHINA
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