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Sampling method for quality detection of entire top cover forging of reactor pressure vessel

A pressure vessel and quality inspection technology, applied in the direction of sampling devices, etc., can solve problems such as damage to joint parts, difficulty in sampling non-standard sampling parts, and difficulty in checking the overall quality of forgings, etc.

Active Publication Date: 2014-07-02
SUZHOU NUCLEAR POWER RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0016] In the process of forming two heads with greatly different thicknesses, it is easy to cause damage to the joint between the thinner head part and the thicker flange part;
[0017] The overall quality of forgings is not easy to check, and it is difficult to take samples from non-standard sampling parts

Method used

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  • Sampling method for quality detection of entire top cover forging of reactor pressure vessel
  • Sampling method for quality detection of entire top cover forging of reactor pressure vessel
  • Sampling method for quality detection of entire top cover forging of reactor pressure vessel

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Embodiment Construction

[0048] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0049] see Figure 1 to Figure 9 , The present invention provides a sampling method for the quality inspection of the integral top cover forging of a reactor pressure vessel. The integral top cover forging 10 includes a sealing portion 30 and a flange portion 20, and the integral top cover forging 10 has an integrally forged flange part 20 and a hemispherical sealing part 30, the flange part 20 is provided with an inner sample ring 21 at the lower part of the inner wall at the nozzle end. The height H of the flange part 20 1 =880mm, the inner radius of the head 30 is R 1 =2010mm, the outer radius is R 2 =2230mm. In addition, due to the installation needs of the integral roof forging 10, a plurality of installation holes for processing the installation holes 31 are preset on the head 30, and the diameter of the installation holes 31 is φ1=1...

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Abstract

The invention provides a sampling method for quality detection of entire top cover forgings of reactor pressure vessels. The sampling method includes: first pre-designing chemical composition analysis positions and sulfur print inspection regions of the entire forging surface before cutting; then performing inner-hole nesting sampling from preset installation holes of an end closure portion and bolt holes of a flange portion of the entire top cover forging; and cutting to obtain an inside test ring, a connection area test ring, a maximum damage zone test ring and a dome center test block from the entire top cover forging and cutting samples therefrom respectively. The sampling method of the present invention not only can inspect the overall quality of the entire top cover forging of the reactor pressure vessel and perform a complete assessment for the manufacturing process of the entire top cover forging in line with the procedure qualification requirements of the RCC-M nuclear power specification, but also does not require complete destruction of the entire top cover forging, so the flange portion still can be used as a flange product after sampling, thereby reducing the cost of sampling.

Description

technical field [0001] The invention relates to the technical field of reactor pressure vessels, in particular to a sampling method for quality inspection of integral top cover forgings of reactor pressure vessels. Background technique [0002] At present, the world has entered a new round of nuclear power development. Many countries are actively preparing to build new nuclear power units. However, the production capacity of large-scale castings and forgings in nuclear islands around the world is very limited, and the manufacturing technology is mainly controlled in a few. In the manufacturing plant, this can no longer meet the needs of the development of nuclear power all over the world. Combined with our country's policy of developing nuclear power and the localization of nuclear power equipment, to achieve the goal of my country's nuclear power development plan, it is necessary to realize the localization of the overall top cover forging of the reactor pressure vessel. I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/04
Inventor 朱喜斌刘钊阚玉琦梁书华黄大鹏张绍军刘璐
Owner SUZHOU NUCLEAR POWER RES INST
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