Nuclear Piping Protection Structure for Shock Absorption and Leak Monitoring
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing nuclear power plant piping systems face challenges with expensive and difficult-to-maintain hardware facilities for dynamic load resistance, insulation, and rupture protection, which occupy valuable space and struggle with leak detection sensitivity outside containment areas.
Innovation Solution
A multifunctional protection device for nuclear power plant piping, comprising an inner pressure-bearing layer, a buffer layer with hollow tube bundle layers, an absorption layer with staggered multi-gap portions, and an outer pressure-bearing layer, which collectively provide positioning, shock absorption, thermal insulation, and leak monitoring capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate hardware facilities (damper, anti-throwing limiter, anti-jet baffle, pit) are installed for piping protection, then the piping can resist dynamic loads and provide rupture protection, but the device complexity increases, maintenance difficulty increases, and valuable layout space is occupied
Solution Approach 1:
The patent combines multiple separate protection functions (thermal insulation, dynamic load resistance, rupture protection, and leak detection) into a single integrated protection device. The device includes an inner pressure-bearing layer, a buffer layer with hollow tube bundle layers for shock absorption, an absorption layer with staggered multi-gap portions, and an outer pressure-bearing layer. This merging eliminates the need for separate dampers, anti-throwing limiters, anti-jet baffles, and pit structures, thereby reducing device complexity and space occupation while maintaining comprehensive piping protection capability
Solution Approach 2:
The protection device is designed to perform multiple functions simultaneously: the inner pressure-bearing layer provides structural support and positioning, the buffer layer with hollow tube bundle layers absorbs dynamic loads from earthquakes and valve operations, the absorption layer with staggered multi-gap portions detects and monitors leaks, and the outer pressure-bearing layer provides rigid support and rupture protection. This multi-functional design allows a single device to replace multiple specialized hardware facilities, reducing overall system complexity while enhancing reliability
2Temperature
If traditional solid thermal insulation layer is used, then the piping is insulated, but the structural strength and rigidity are very low, and the insulation material has certain pollution and short life
Solution Approach 1:
The patent employs a composite structure consisting of multiple layers with different material properties: the inner pressure-bearing layer provides structural strength, the buffer layer with hollow tube bundle layers offers shock absorption and flexibility, the absorption layer with staggered multi-gap portions provides leak detection capability, and the outer pressure-bearing layer delivers rigid support. This composite material approach maintains effective thermal insulation while significantly enhancing structural strength, rigidity, and service life compared to traditional solid insulation materials
Solution Approach 2:
The buffer layer with hollow tube bundle layers introduces flexibility to the protection device, allowing it to accommodate dynamic loads and thermal expansion without compromising structural integrity. The hollow tube structure provides both flexibility and strength, replacing traditional rigid solid insulation materials that lack structural resilience and have short service lives
3Measurement precision
If pit structures are installed for leak detection outside containment, then leak monitoring can be implemented, but the device complexity increases and valuable layout space is occupied
Solution Approach 1:
The leak detection function is merged into the absorption layer with staggered multi-gap portions, which is an integral part of the protection device rather than a separate pit structure. The staggered multi-gap portions enable sensitive leak detection by allowing leakage medium to pass through and be detected, eliminating the need for external pit structures while maintaining detection precision
Solution Approach 2:
The leak detection capability is extracted from the traditional pit structure concept and integrated directly into the absorption layer of the protection device. The staggered multi-gap portions serve as the detection mechanism, removing the need for separate pit structures and associated monitoring equipment, thereby reducing device complexity while preserving leak detection sensitivity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device effectively addresses earthquake resistance, fracture impact, thermal insulation, and quantitative leak monitoring, replacing the need for multiple hardware facilities, optimizing design, ensuring nuclear safety, and reducing economic costs.
Implementation Method 1
a buffer layer, an absorption layer and an outer pressure-bearing layer are sequentially connected from inside to outside by taking the inner pressure-bearing layer as a center; The buffer layer comprises a plurality of hollow tube bundle layers
Implementation Method 2
Piping is the channel containing transmission medium in different systems of nuclear power plant, which not only performs core functions, but also constitutes an important pressure boundary. The piping is equipped with insulation layer for insulation, damper for resisting dynamic load
Implementation Method 3
The absorption layer comprises a plurality of multi-gap portions which are mutually staggered, and each multi-gap portion is provided with a plurality of absorption layer pores
Implementation Method 4
each multi-gap portion is provided with a plurality of absorption layer pores
Implementation Method 5
The piping is equipped with insulation layer for insulation
Data Source
Figure 1~2
Figure 3
AI summary
Disclosed in the present invention is a multifunctional protection device for a pipeline in a nuclear power plant, the multifunctional protection device comprising an inner pressure bearing layer sleeved on the periphery of the pipeline for positioning and fixing the pipeline, the multifunctional protection device for a pipeline in a nuclear power plant is provided with a buffer layer, an absorption layer and an outer pressure bearing layer connected in sequence from inside to outside with the inner pressure bearing layer as the center, wherein the buffer layer comprises several hollow pipe bundle layers, the several hollow pipe bundle layers being connected around the inner pressure bearing layer to form the buffer layer, the absorption layer comprises several multi-gap portions which are mutually and alternately arranged, several small absorption layer pores being provided on each multi-gap portion, and the outer pressure bearing layer is arranged on the outermost layer of the multifunctional protection device of a pipeline in a nuclear power plant and is used for providing rigid support and preventing leakage in the piping. The multifunctional protection device can solve the problems of earthquake resistance, fracture and shock, thermal insulation, and quantitative monitoring of medium leakage of an important piping in a nuclear power plant, and can replace a damper, an anti-shock limiting piece, an anti-jet baffle, a pit liquid level monitoring device, etc., to ensure nuclear safety.