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Method and apparatus for mitigating vibration in a nuclear reactor component

A technology of nuclear reactors and components, applied in the control of nuclear reactions, reactors, nuclear engineering solutions, etc., can solve problems such as component cracking

Inactive Publication Date: 2006-01-04
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High amplitudes in boiling water reactors can lead to high stresses that can lead to cracking of boiling water reactor components

Method used

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  • Method and apparatus for mitigating vibration in a nuclear reactor component
  • Method and apparatus for mitigating vibration in a nuclear reactor component
  • Method and apparatus for mitigating vibration in a nuclear reactor component

Examples

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Embodiment Construction

[0012] Figure 2A and 2B A vibration damping device (VMD) according to an exemplary embodiment of the present invention is shown. Figure 2A is a cross-sectional view of VMD200, and Figure 2B is an exploded view of the VMD200. VMD 200 may be operatively attached or connected to reactor components within a boiling water reactor, such as components in steam dryer assembly 30 . As shown, VMD 200 may include acoustic screen 210 . Acoustic barrier 210 may comprise stainless steel and / or any other material suitable for a boiling water reactor environment. An acoustic screen 210 may be provided to reduce eddy currents that may excite acoustic room modes.

[0013] For example, acoustic barrier 210 may be configured to provide a relatively smooth flow of vapor through VMD 200 . This smooth flow of steam may help to avoid and / or potentially prevent acoustic chamber modes, which may also be referred to as acoustic cavity modes, from being excited in the steam plenum of the steam d...

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PUM

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Abstract

A device is provided for mitigating vibration in a component of a nuclear reactor by removing vibration energy. To reduce vibration in the component, a device operatively connected to the component and including a magnet (340) may be actuated within a conductive cylinder (330). This actuation may generate one or more eddy currents providing a damping function for removing vibration energy from the component, so as to alter vibration characteristics of the component.

Description

technical field [0001] The present invention generally relates to a vibration damping arrangement for a nuclear reactor component and to a method for damping vibrations in a nuclear reactor component. Background technique [0002] Boiling water reactors (BWRs) have emerged as a reliable type of nuclear reactor for generating electrical energy. However, some boiling water reactors have experienced cracks in their various components. A contributing factor to component cracking in boiling water reactors may be due to high cycle fatigue. Typically, a boiling water reactor operates for about one to two years after filling a single fuel core. After a set period (commonly known as the power cycle or fuel cycle) approximately 1 / 4-1 / 2 of the least reactive fuel (the longest spent or most burned) can be removed from the reactor . The number of cycles that can constitute a relatively high cycle can vary from one boiling water reactor to another, as can other factors that can affect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C7/20
CPCG21D1/00G21Y2002/303G21Y2004/30G21Y2002/207Y02E30/40G21C13/02Y02E30/30Y02E30/00
Inventor D·V·萨默维尔
Owner GENERAL ELECTRIC CO
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