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Stable structure of main coolant pipeline of AP1000 nuclear power plant and vibration adjusting process thereof

A main coolant and pipeline technology, applied in the field of stable structure and its vibration adjustment process, can solve the problems of unstable pipeline and easy displacement of pipeline.

Active Publication Date: 2019-11-12
SANMEN NUCLEAR POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of instability of ADS-4 grade B / D row pipelines and easy displacement of pipelines, the invention provides a stable structure for main coolant pipelines of nuclear power plants

Method used

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  • Stable structure of main coolant pipeline of AP1000 nuclear power plant and vibration adjusting process thereof
  • Stable structure of main coolant pipeline of AP1000 nuclear power plant and vibration adjusting process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] A stable structure for the main coolant pipeline of a nuclear power plant, including a rigid support, a rigid door frame, a constant force hanger and a damper, which are respectively arranged on two rows of outgoing pipelines. The rigid support includes an upper rigid support A1, an upper rigid support B2, lower rigid support A3 and lower rigid support B7;

[0078] The upper rigid support A1 and the rigid door frame 6 are installed on one of the outgoing pipelines, and the upper rigid support B, lower rigid support A, and lower rigid support B are installed on the other column of outgoing pipelines; the ends of the two outgoing pipelines 4 are respectively connected to constant force cranes A12 And constant force crane B13, damper A10 and damper B11, as attached figure 2 As shown, the constant force crane is installed vertically, and the damper is installed horizontally;

[0079] Each of the rigid brackets includes a holding card 301 connected to the pipeline and a sup...

Embodiment 2

[0115] Between steps S-31 and S-32, add a step: bend the 2 fins of the stop washer so that they are as perpendicular as possible to the holding card and fit together, you can try to bend one before tightening the nut torque fins.

[0116] Between steps S-33 and S-34, add a step: apply Loctite 2432 locking agent on the thread of the rigid bracket casing, and continue to tighten 1 / 8-1 / 4 after the lock nut is tightly attached to the casing During the circle, keep the bracket sleeve not to rotate.

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Abstract

The invention belongs to the technical field of a vibration adjusting process of a stable structure of a main coolant pipeline of an AP1000 nuclear power plant. By analyzing a vibration adjusting problem, the process comprises the following steps: S1, measuring and recording data before adjustment; S2, removing a rigid bracket: mounting a temporary support right above positions of pipelines mounted on an upper rigid bracket A, an upper rigid bracket B and a lower rigid bracket B, and matching with a hand pulled block to remove the rigid brackets synchronously; and S3, adjusting and back-mounting the brackets. Vibration of an ADS-4 grade pipeline is adjusted, so that the vibration problem of ADS-4 grade B / D column pipelines is solved.

Description

technical field [0001] The invention belongs to the technical field of the vibration adjustment process of the main coolant pipeline of the AP1000 nuclear power plant, and specifically relates to a stable structure and a vibration adjustment process for the fourth-level (ADS-4) pipeline of the automatic pressure relief system of the AP1000 nuclear power plant, mainly to eliminate ADS-4 level B / D column pipeline vibration problem. By formulating this set of processes, the vibration adjustment of ADS-4 grade pipelines can be quickly and effectively completed, and the problem of high vibration of ADS-4 grade B / D pipelines can be solved. Background technique [0002] During the commissioning and operation of the nuclear power plant, ADS-4 level B / D series pipelines have high vibration problems, especially when the main pump speed of the primary circuit rises to 88% platform, high vibration alarms will always occur on the pipelines. ADS-4 pipeline alarm value: low report 43mm / s,...

Claims

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Application Information

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IPC IPC(8): F16L3/08F16L3/10F16L3/11F16L3/20F16L55/04G21C15/02F16B39/02F16B39/10F16B39/12
CPCF16B39/021F16B39/10F16B39/12F16L3/08F16L3/1091F16L3/11F16L3/20F16L55/041G21C15/02Y02E30/30
Inventor 谭进
Owner SANMEN NUCLEAR POWER CO LTD
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