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Aligning device for fuel elements of a pressurized water reactor

A technology for pressurized water reactors and calibration devices, applied to reactor fuel elements, fuel elements, reactors, etc., can solve problems such as time-consuming, expensive, and long shutdown times, and achieve the effect of reducing the shutdown time

Inactive Publication Date: 2006-07-19
阿雷瓦核能有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process is very time consuming due to the often multiple placement attempts of the fuel elements in the reactor core and is very expensive due to the concurrent long downtime

Method used

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  • Aligning device for fuel elements of a pressurized water reactor
  • Aligning device for fuel elements of a pressurized water reactor
  • Aligning device for fuel elements of a pressurized water reactor

Examples

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Embodiment Construction

[0026] Like parts are marked with the same reference numerals in all figures.

[0027] figure 1 A top view of a reactor core of a pressurized water reactor with fuel elements 1 comprising a plurality of fuel rods 2 is schematically shown. like figure 1 As shown, the fuel rods are arranged at a relatively small distance from one another and, depending on their length, are located in the reactor core or in the reactor activation zone.

[0028] In order to calibrate the fuel element 1 or to correct the deformation of its side wall, in figure 2The calibration device 6 for the fuel element 1 is shown in . For calibrating the fuel elements 1 , the calibrating device 6 is dimensioned such that it is positioned in the void of the reactor core of the pressurized water reactor, in particular even when adjacent fuel elements 1 are deformed. For this purpose, the cross-sectional area of ​​the correction device 6 is dimensioned such that it has a smaller cross-section in the rest posi...

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PUM

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Abstract

The aim of the invention is to provide an aligning device (6) for fuel elements (1) with which fuel elements (1) of a pressurized water reactor can be aligned in a comparatively easy and quick manner. To this end, the invention provides that an aligning device (6) for fuel elements comprises an aligning body (8), which extends in a longitudinal direction and whose lateral faces that are formed from side metal sheets (14) can be displaced out of a position of rest in a direction that is perpendicular to the longitudinal direction. The cross-sectional dimensions of the lateral faces of the aligning body in the position of rest are selected so that they are less than the corresponding cross-sectional dimension of a reference fuel element by a predetermined nominal value.

Description

technical field [0001] The invention relates to a correction device (collimation device) for fuel elements of a pressurized water reactor. Background technique [0002] In nuclear technology installations, especially in nuclear power plants, fissionable materials with controlled nuclear fission are often used for the generation of electrical energy. The fissionable material then has a plurality of fuel rods in which the material is present, for example in the form of so-called pellets, and is surrounded by a suitable enveloping tube. In this case a large number of fuel rods of this type usually make up a fuel element. Nuclear power plants have a large number of such fuel elements, which are substantially in the shape of a longitudinally extending cuboid or in particular also longitudinally extending in the form of a cube, and which are located in the reactor core. In this case, the fuel elements are arranged adjacent to each other on fuel element storage racks of the react...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C19/16G21C19/20
CPCG21C19/205G21C19/16G21Y2004/504G21Y2004/501G21Y2004/403G21Y2002/402Y02E30/30G21C3/12
Inventor 海因茨·马斯霍尔格·魏默
Owner 阿雷瓦核能有限责任公司