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Measurement and processing method of main bolt tension data of new reactor pressure vessel

A pressure vessel and data measurement technology, applied in reactors, nuclear reactor monitoring, nuclear power generation, etc., can solve the problems of high probability of human error, time-consuming and labor-consuming, complicated operation steps, etc., to reduce the time for external exposure, reduce Random effects, effects that reduce the chance of occurrence

Active Publication Date: 2018-06-26
HAINAN NUCLEAR POWER CO LTD
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Problems solved by technology

[0003] The purpose of the present invention is to provide a novel reactor pressure vessel main bolt tensile data measurement and processing method, which solves the problem of complicated operation steps, time-consuming and labor-consuming, high radiation dose received by data measurement personnel, and many information transmission links in the existing method. Problems with a high probability of human error

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  • Measurement and processing method of main bolt tension data of new reactor pressure vessel
  • Measurement and processing method of main bolt tension data of new reactor pressure vessel
  • Measurement and processing method of main bolt tension data of new reactor pressure vessel

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Embodiment Construction

[0020] A novel reactor pressure vessel main bolt tension data measurement and processing method, the method specifically includes the following steps:

[0021] Step 1. Obtain the original value of the reactor pressure vessel bolt measuring rod;

[0022] Before the main bolts of the pressure vessel are stretched, two sets of depth values ​​of each main bolt are obtained respectively;

[0023] Step 2. Stretch the pressure vessel bolts three times, and accurately obtain the stretching amount of each bolt;

[0024] The pressure vessel bolts are stretched three times, and after each stretch, the two sets of pressure vessel bolt depth values ​​measured on the steel cladding surface of the +10.86m core pool are transmitted through two separate data transmission modules. The data receiving module on the +20m platform conducts analysis and comparison. If the difference between the two sets of measurement values ​​of a certain bolt is greater than or equal to 0.02mm among the two sets ...

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Abstract

The invention relates to the technical field of reactor pressure vessel bolt tensioning and specifically discloses a novel reactor pressure vessel kingbolt tensioning data measurement and processing method. The method specifically contains the following steps: 1, acquiring original data of a reactor pressure vessel bolt measuring bar; 2, tensioning pressure vessel bolts for three times and accurately acquiring tension amount of each bolt; and 3, adjusting tensioning on unqualified bolts in the pressure vessel bolts. By the novel reactor pressure vessel kingbolt tensioning data measurement and processing method, workers don't need to pile up cores repeatedly up and down such that the risk (as the reactor pit ladder is designed to be narrow in width and has a wet and slippery surface, and workers wearing shoe covers are easy to slip and fall) of falling down from a ladder is reduced; and external irradiation time is reduced for reactor pit data measuring workers, probability of stochastic effect is better reduced, and the method accords with the principle of radiation protection optimization.

Description

technical field [0001] The invention belongs to the technical field of bolt tensioning of reactor pressure vessels, and in particular relates to a novel method for measuring and processing tension data of main bolts of reactor pressure vessels. Background technique [0002] After the refueling of the reactor in a nuclear power plant or the maintenance of various components inside the reactor, the top cover of the reactor pressure vessel must be closed. Some power plants use the main bolt hydraulic tensioning system including four tensioning machines to stretch the bolts and tighten the nuts to close the top cover of the reactor pressure vessel; the four tensioning machines are evenly distributed on the flange surface of the top cover at 90° apart , stretch the symmetrical bolts according to the prescribed steps in turn. The hydraulic value of the tensioning machine is as high as 900bar. In order to ensure the uniformity and reliability of the load of each main bolt, accordi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C17/00
CPCY02E30/30
Inventor 杨青松吴向东卢铁忠胡冬清周晨曦翟晓彤韩培顾新荣
Owner HAINAN NUCLEAR POWER CO LTD
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