Method for manufacturing positioning insert for reactor internal in AP1000 nuclear power station

A technology of internal components and nuclear power plants, applied in the field of nuclear power plant construction, can solve problems such as long time-consuming, heavy workload, and difficult measurement

Active Publication Date: 2017-08-25
CHINA NUCLEAR IND FIFTH CONSTR CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It can be seen that when using the prior art to make positioning inserts, the hoisting and centering of the lower internal components must first be completed before the positioning inserts located between the radial support key and the radial support keyway can be aligned. To measure t

Method used

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  • Method for manufacturing positioning insert for reactor internal in AP1000 nuclear power station
  • Method for manufacturing positioning insert for reactor internal in AP1000 nuclear power station
  • Method for manufacturing positioning insert for reactor internal in AP1000 nuclear power station

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Embodiment Construction

[0027] Below, combine Figure 1-6 The method for making positioning inserts for internal components in the AP1000 nuclear power plant of the present invention will be described in detail.

[0028] Arrange RV measurement points on the pressure vessel, and the RV measurement points include RV flange measurement points, core support surface measurement points, connected inner wall measurement points, radial support keyway measurement points, positioning pin groove measurement points and RV nozzles Measuring point. Wherein, the RV flange measuring point is located on the inner circle of the upper flange of the pressure vessel, and at least 8 RV flange measuring points are arranged on the inner circle of the upper flange. Such as figure 1 As shown, 16 RV flange measurement points are arranged on the inner circle of the upper flange 11 of the pressure vessel 1, and these RV flange measurement points are regarded as a group of measurement points, which are marked as RV-F1, RV-F2, ...

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Abstract

The invention relates to the field of construction of nuclear power stations. In order to reduce the workload, shorten the production time and improve the production precision, the invention provides a method for manufacturing a positioning insert for reactor internals in an AP1000 nuclear power station. The method comprises the following steps: arranging an RV control point and an RV measuring point; arranging a reactor internal control point and a reactor internal measuring point; measuring the measuring points by utilizing a laser tracker, establishing a cylinder reference simulation coordinate system and a base model of a pressure container in three-dimensional modeling software according to the measurement data, and establishing a mounting model of a lower internal; guiding the mounting model of the lower reactor internal into the base model of the pressure container, aligning, and pairing pipe nozzles; and analyzing and calculating processing data of a positioning insert, and processing the positioning insert according to the processing data. The method for manufacturing the positioning insert for the reactor internal in the AP1000 nuclear power station is high in manufacturing precision, small in workload and short in time consumption.

Description

technical field [0001] The invention relates to the field of nuclear power plant construction, in particular to a method for making a positioning insert used when installing lower internals in an AP1000 nuclear power plant. Background technique [0002] In the AP1000 nuclear power plant, since the reactor internals and the pressure vessel are manufactured by different manufacturers, in order to meet the assembly requirements between the reactor internals and the pressure vessel, it is necessary to process and manufacture radial components installed on the pressure vessel at the installation site according to actual needs. Supports positioning inserts in keyways. [0003] At present, when making positioning inserts commonly used, it is necessary to hoist the lower internals into the pressure vessel and align the lower internals with the pressure vessel, and then measure the radial support key and diameter of the lower internals. The shape and size of the gap between the supp...

Claims

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Application Information

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IPC IPC(8): G21C21/00
CPCG21C21/00Y02E30/30
Inventor 郭强李建董培科龚凤成姜国国甘锐皮兴刚邱承乾
Owner CHINA NUCLEAR IND FIFTH CONSTR CO LTD
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