Nuclear power station fuel module damage online detection device

A fuel assembly and detection device technology, which is applied in the field of nuclear power, can solve problems such as fuel assembly damage, gas sample radioactive level prone to misjudgment, and data environmental factors that are greatly affected, so as to improve accuracy, increase the lower limit of detection, and reduce the background The effect of counting

Active Publication Date: 2019-03-19
NUCLEAR POWER INSTITUTE OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 fo

Method used

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  • Nuclear power station fuel module damage online detection device
  • Nuclear power station fuel module damage online detection device

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Experimental program
Comparison scheme
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 a nuclear power station fuel module damage online detection device. The nuclear power station fuel module damage online detection device comprises a gas sampling chamber, a gamma radiation detector, a beta radiation detector, a gas extracting device, a gas sucking device and a nuclear data processing device, wherein the gamma radiation detector and the beta radiation detector are arranged on the gas sampling chamber, the gamma radiation detector detects gamma radiation particles inside the gas sampling chamber, and the beta radiation detector detects beta radiation particles inside the gas sampling chamber. The nuclear power station fuel module damage online detection device is based on beta-gamma compounded radioactivity detection technology, reduces the influenceof device background on environmental factors through association of beta-gamma rays to increase the detection lower limit and further to ensure determination of whether a fuel module is damaged on alow radioactive level, thereby improving the detecting accuracy.

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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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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