Setting method of nuclear level indicator for pressure vessel

A pressure vessel and material level gauge technology, which is applied in the field of nuclear material level gauges for pressure vessels, can solve the problems of difficulty in relieving local peak stress at the outer edge of openings, difficulty in tightly fitting welded pipes, and strong radiation safety risks, etc. Achieve the effect of simple and reliable setup, simple manufacturing, and improved fatigue and creep failure resistance.

Pending Publication Date: 2021-06-08
CHINA PETROLEUM & CHEM CORP +2
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Problems solved by technology

[0004] In order to ensure the bearing capacity and anti-fatigue and anti-creep performance of the non-penetrating opening, the engineering design usually adopts to reduce the opening depth to ensure that the shell at the opening has a large residual wall thickness, but in order to ensure a certain For penetrability, it is necessary to increase the dose of the emission source of the nuclear level gauge. This solution is not only economical, but also brings strong radiation safety

Method used

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  • Setting method of nuclear level indicator for pressure vessel
  • Setting method of nuclear level indicator for pressure vessel

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[0031] The present invention will be further described below with reference to the accompanying drawings.

[0032] Combine figure 1 with figure 2 Nuclear material setting method for the pressure vessel provided by the present invention includes the following steps:

[0033] 1) Determine the mounting position on the pressure vessel in the pressure vessel according to the minimum operating position 10 of the material 9 in the pressure vessel.

[0034] 2) Determining the installation sequence of each component of the nuclear material measure according to the mounting position of the nuclear material discharge site:

[0035] A. Install the built-in nuclear source sleeve: Built-in nuclear source sleeve 1 generally insert the pressure vessel cylinder 5 from the pressure vessel body 5, close to the bottom of the pressure vessel cylinder 5, in ensuring built-in nuclear source sleeve 1 and pressure vessel Under the premise of the upper head 13 opening, the built-in nuclear source sleeve 1 ...

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Abstract

The invention discloses a method for setting a nuclear level indicator for a pressure vessel, which comprises the following steps of: 1) determining the mounting position of the nuclear level indicator on the pressure vessel according to an operation level in the pressure vessel; 2) according to the mounting position of the nuclear level indicator, determining the installation sequence of the nuclear level indicator as follows: a, the built-in nuclear source sleeve is installed; b, setting a nuclear emission source; c, surfacing the annular boss; d, a non-penetrating hole is machined; and e, installing a nuclear ray receiver. According to the method for setting the nuclear level gauge, the depth of the non-penetrating open pore can be greatly improved, so that the penetrability of rays of the nuclear level gauge is improved, the dosage of a nuclear source is reduced, and the economic cost and additional radiation risk of the nuclear level gauge are reduced.

Description

technical field [0001] The invention relates to the field of pressure vessels, in particular to a method for setting a nuclear level gauge for a pressure vessel. Background technique [0002] In petrochemical installations, when the internal environment of the pressure vessel is high temperature, high pressure or the material is highly viscous and corrosive, in order to measure the change of the material level inside the vessel, a nuclear level gauge measurement system with non-contact characteristics is usually used. Nuclear level gauges generally consist of a built-in nuclear source and an external receiver. [0003] When the pressure vessel is subjected to high temperature and high pressure, the shell wall thickness is relatively thick, approximately 100-400mm. When the nuclear level gauge is running, the ray passes through the thicker steel plate and will have greater attenuation. In order to reduce the attenuation of rays, reduce the dose of the emission source, ensur...

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Application Information

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IPC IPC(8): G01F23/288G01F23/284
CPCG01F23/288G01F23/284
Inventor 许超洋张国信李群生李双权
Owner CHINA PETROLEUM & CHEM CORP
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