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Monitoring method and monitoring device for corrosion state of drum type filter screen of nuclear power plant

A drum-shaped filter screen, corrosion state technology, applied in measuring devices, material analysis through electromagnetic means, instruments, etc., can solve the problems of complex environment, difficult to meet the needs of accurate monitoring, etc., to achieve the effect of safety detection and evaluation

Pending Publication Date: 2022-04-08
SUZHOU NUCLEAR POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the perspective of safety and operating time, there are major problems; secondly, the rotary filter screen is a key component of the cold source system of a nuclear power plant. Based on its importance, it is urgent to conduct regional accurate monitoring of the corrosion status of each area of ​​the equipment. However, it is located in a complex environment and belongs to the difficult-to-reach underwater area, and the existing technology is difficult to meet the needs of precise monitoring

Method used

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  • Monitoring method and monitoring device for corrosion state of drum type filter screen of nuclear power plant
  • Monitoring method and monitoring device for corrosion state of drum type filter screen of nuclear power plant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] like Figure 1-2 As shown, the monitoring device for the corrosion state of the nuclear power plant drum filter screen 1 of the present embodiment includes a track 3 set corresponding to the drum filter screen 1, a mobile trolley moving along the track 3, a potential sensor arranged on the mobile trolley, and a Monitoring modules for monitoring potentials as well as control and evaluation modules. The track 3 can be made of carbon fiber material, which is light in weight and high in strength. The track 3 is installed between the rotating shaft and the installation wall, and is supported on the rotating shaft to avoid interference with the spokes 2 of the drum filter 1 .

[0034] Track 3 includes a beam supported on the rotating shaft and a beam extending downward from the beam. According to the actual detection requirements, the mobile trolley is controlled to stop at any position of the beam or the beam for measurement. Multiple support beams are located at different...

Embodiment 2

[0039] The method for monitoring the corrosion state of the nuclear power plant drum filter 1 in this embodiment is based on the monitoring device in Embodiment 1, and specifically includes the following steps:

[0040] 1) Electrically connect the positive pole of the monitoring module to the drum filter 1, and electrically connect the negative pole of the monitoring module to the potential sensor. During the measurement process or during non-measurement, the drum-shaped filter screen 1 continues to rotate at a constant speed.

[0041] The potentiometric sensor is a potentiometric sensor with a high-purity zinc reference electrode and is retractable. When measurement is required, the probe is inserted into the liquid surface for measurement.

[0042] Considering the drum filter 1 as a whole, the positive electrode of the monitoring module can be connected to any position of the rotating drum filter 1, preferably at the rotating shaft.

[0043] In order to facilitate the move...

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Abstract

The invention discloses a method for monitoring the corrosion state of a drum-shaped filter screen of a nuclear power plant, and the method comprises the following steps: enabling the positive electrode of a monitoring module to be electrically connected with the drum-shaped filter screen, and enabling the negative electrode of the monitoring module to be electrically connected with a potential sensor; controlling the potential sensor to move to the measuring points at different positions so as to measure the potentials between the drum-shaped filter screen and the measuring points at different positions; and / or, the position of a measuring point of the potential sensor is controlled to be fixed, and the potential sensor is used for measuring potentials between different positions of the drum-type filter screen and the measuring point; and judging the corrosion state of the drum-type filter screen according to the measured potential. According to the monitoring method for the corrosion state of the drum type filter screen of the nuclear power plant, the safety problem and the time problem of detection of the corrosion state of the drum type filter screen cylinder of the nuclear power plant can be solved, the detection and evaluation efficiency is improved, and meanwhile accurate regional monitoring and evaluation are conducted; and on-site detection and evaluation can be completed quickly, efficiently and safely.

Description

technical field [0001] The invention belongs to the technical field of rapid detection and evaluation of metal corrosion state, is applied to metal surface corrosion and protection, and specifically relates to a monitoring method and a monitoring device for the corrosion state of a nuclear power plant drum filter. Background technique [0002] The CFI (Circulating Water Filtration, circulating water filtration) system in the nuclear power unit filters the seawater used for unit cooling. The filter components are mainly composed of coarse grilles, chlorination frames (sluice gates), fine grilles and rotary drum filters, etc. composition. Among them, the coarse grid, the chlorine adding frame and the fine grid are all made of stainless steel; the filter mesh of the rotating filter is made of stainless steel, but the frame, spokes and ring gear fixing grooves that support the filter are made of stainless steel. Made of carbon steel and coated with anti-corrosion coating. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F13/22G01N27/00
CPCY02E30/30
Inventor 林泽泉沈新生付国庆张磊彭群家
Owner SUZHOU NUCLEAR POWER RES INST