In-core Monitor Guide Tube Vibration Damping Support
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Solution Overview
Problem
In-core monitor guide tubes in reactor vessels face reduced strength against vibration when disposed between the top cover and the core support plate due to limited space, often requiring reduced diameter, which compromises their rigidity.
Innovation Solution
An in-core-monitor-guide-tube supporting apparatus is designed with a monitor-guide-tube fixing arrangement that attaches each guide tube to the core support plate, a reinforcing arrangement that integrates the fixing mechanism with the guide tube, and a coupling arrangement that connects all guide tubes closer to the top cover, enhancing their rigidity and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If in-core monitor guide tubes are disposed between the top cover and the core support plate, then the space utilization is improved, but the diameter of the guide tubes must be reduced which worsens the strength against vibration
Solution Approach 1:
The support structure is divided into multiple segments: a fixing arrangement that attaches the guide tube to the core support plate, a reinforcing arrangement that provides local strengthening, and a coupling arrangement that connects multiple guide tubes together. This segmentation allows each component to address specific structural needs without requiring reduction of the guide tube diameter.
Solution Approach 2:
The supporting apparatus uses a composite structural approach combining different types of arrangements (fixing, reinforcing, and coupling) to create an integrated support system. This composite structure provides enhanced strength against vibration while maintaining the original guide tube diameter and space utilization benefits.
2Volume of moving object
If the diameter of in-core monitor guide tubes is reduced to fit limited space, then the space constraint is satisfied, but the rigidity of the guide tubes deteriorates
Solution Approach 1:
The support system is segmented into fixing arrangement (for attachment), reinforcing arrangement (for rigidity enhancement), and coupling arrangement (for interconnected support). This segmentation allows the guide tubes to maintain reduced diameter for space efficiency while the external support structures provide the necessary rigidity.
Solution Approach 2:
The reinforcing arrangement acts as an intermediary element between the guide tube and the fixing arrangement, providing additional structural support and rigidity without requiring the guide tube itself to be larger. This intermediary structure mediates between the space constraints and rigidity requirements.
3Stability of the object's composition
If a cantilever beam structure is used to support multiple in-core monitor guide tubes, then the integral support is achieved, but the complexity of the supporting apparatus increases
Solution Approach 1:
Instead of using a single complex cantilever beam structure, the support system is segmented into separate functional arrangements: fixing arrangement for attachment, reinforcing arrangement for structural integrity, and coupling arrangement for connecting multiple tubes. This segmentation simplifies each individual component while achieving integral support through their combination.
Solution Approach 2:
The coupling arrangement serves multiple functions: it connects adjacent guide tubes together, provides additional support, and enhances the overall integral stability. This multi-functional design reduces the need for separate specialized components, thereby reducing overall complexity while maintaining integral support.
Data Source
AI summary
Monitor-guide-tube fixing sections are fixed to portions on a core support plate side of a plurality of in-core monitor guide tubes disposed in a reactor vessel. The monitor-guide-tube fixing sections are fixed to the core support plate disposed in the reactor vessel to fix the in-core monitor guide tubes to the core support plate. This makes it possible to realize improvement of rigidity of the fixed sections of the in-core monitor guide tubes. A tie plate is fixed to the in-core monitor guide tubes. The in-core monitor guide tubes are coupled by the tie plate. This makes it possible to realize improvement of rigidity of the entire in-core monitor guide tubes. As a result, it is possible to realize vibration damping for the in-core monitor guide tubes.