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Radiation monitoring instrument protection device and installing method thereof

A protection device and radiation monitoring technology, applied in the field of maintenance of nuclear power plants, can solve the problems that the detector cannot be put into the guide tube, the instrument loses the normal monitoring function, etc., and achieves the effect of simple and convenient on-site installation, simple structure and protection.

Pending Publication Date: 2018-11-16
JIANGSU NUCLEAR POWER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

After the calibration is completed, the detector cannot be placed in the guide tube, causing the instrument to lose its normal monitoring function

Method used

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  • Radiation monitoring instrument protection device and installing method thereof
  • Radiation monitoring instrument protection device and installing method thereof
  • Radiation monitoring instrument protection device and installing method thereof

Examples

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Embodiment Construction

[0027] The technology of the present invention is further described below:

[0028] The invention provides a monitoring instrument installation protection device aiming at the environment particularity of the installation area of ​​the radiation monitoring instrument of the important factory water process system on the nuclear power plant site, which can ensure the safety of the instrument on the seabed and avoid the loss of radioactive sources. At the same time, it facilitates the maintenance of monitoring instruments, ensures the stable operation and detection efficiency of detectors, and thus meets the strict requirements of nuclear power plants for the monitoring and control of radioactive substances in drain outlets.

[0029] Such as Figures 1 to 3 As shown, a radiation monitoring instrument protection device includes: a flange 2, a cover plate 8, a steel wire rope 9, an upper cylinder 3 and a lower cylinder 5, and the section of the radiation monitoring instrument prote...

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Abstract

The invention belongs to the technical field of nuclear power plant maintenance and particularly relates to a radiation monitoring instrument protection device comprising: a flange, a cover plate, a steel wire rope, an upper cylinder body and a lower cylinder body. The radiation monitoring instrument protection device has a T-shaped cross section. The flange and the upper end of the upper cylinderare integrally formed. The lower end of the upper cylinder and the upper end of the lower cylinder are welded. The cover plate is screwed to the upper surface of the flange. The bottom of the lower cylinder is a closed structure. The method of adding a polyethylene radiation monitoring instrument protection device to an original guiding tube can isolate a detector from seawater, protects the detector and its related parts against seawater corrosion, and effectively reduce a risk that the detector falls into the sea.

Description

technical field [0001] The invention belongs to the technical field of nuclear power plant maintenance, and in particular relates to a radiation monitoring instrument protection device and an installation method thereof. Background technique [0002] In order to monitor the radioactive level of seawater discharged to the environment in real time, a nuclear power plant installed two immersion liquid volume activity monitors in the drainage ditch of the important plant water process system. The NaI detector of the monitor is sealed in a plastic waterproof cover. The detector and the waterproof cover are installed in the detector guide tube through a steel wire rope. The detector is immersed in seawater to complete real-time monitoring of the radioactivity of the discharged seawater. [0003] Because the detector and its waterproof cover are directly immersed in seawater, affected by the current, the detector and its waterproof cover are stuck at the bell mouth of the guide tub...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T7/00
CPCG01T7/00
Inventor 孙小康王环宇李中李伟丁强滕晓雷孙新安赵晗徐霞军黄亚宁李占华乔馨
Owner JIANGSU NUCLEAR POWER CORP
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