Nuclear ACS Damping System with 3D-Compensators
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Solution Overview
Problem
Existing automated control system (ACS) hardware and software in nuclear power plants face challenges in damping large mechanical oscillations from earthquakes and man-made impacts without increasing overall structure dimensions, as current seismic protection platforms are ineffective for low-frequency oscillations and industrial vibrations lead to mechanical aging.
Innovation Solution
A mechanical oscillation damping system incorporating load-bearing girders, low-frequency oscillation damping units with pre-compressed vertical and horizontal dampers, and 3D-compensators to manage oscillations within limited structural dimensions, ensuring the ACS functions under extreme conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If seismic protection platforms are used to shield oscillations, then protection against earthquakes is improved, but the ability to dampen low-frequency oscillations deteriorates due to dimensional limitations
Solution Approach 1:
The damping system is divided into separate functional modules: vertical oscillation dampers, horizontal oscillation dampers, and 3D-compensators, each addressing specific oscillation directions and frequency ranges. This segmentation allows each component to be optimized for its specific function while working together to provide comprehensive protection.
Solution Approach 2:
The invention transitions from two-dimensional damping (vertical and horizontal) to three-dimensional damping by incorporating 3D-compensators that address oscillations in all spatial dimensions. This dimensional expansion enables effective dampening of low-frequency oscillations that were previously无法被 controlled.
2Object-affected harmful factors
If 3D-compensators are used for vibration compensation, then protection against industrial vibration is improved, but protection against large-range low-frequency oscillations deteriorates
Solution Approach 1:
The invention merges 3D-compensators with additional damping units (vertical and horizontal oscillation dampers) to create a hybrid system. This combination allows the system to simultaneously handle high-frequency industrial vibrations (via 3D-compensators) and low-frequency large-range oscillations (via the additional dampers).
Solution Approach 2:
The damping base is designed as a multi-functional system that can operate effectively across different frequency ranges and oscillation amplitudes. By integrating multiple types of dampers, the system achieves universal protection against various vibration conditions including industrial vibrations, earthquake oscillations, and impact loads.
3Device complexity
If seismic protection platforms with limited dimensions are used, then integration into cabinets is improved, but damping effectiveness for low-frequency oscillations deteriorates
Solution Approach 1:
The damping system incorporates dynamic elements including movable supports with spherical bearings that allow adaptive response to oscillations in any direction. The vertical oscillation damper uses a movable support that can dynamically adjust to varying oscillation amplitudes, maintaining effectiveness within compact dimensions.
Solution Approach 2:
The system changes the parameters of oscillation dampening by using pre-compressed springs with specific stiffness coefficients tailored for low-frequency oscillations. The spring compression and stiffness are optimized to provide effective damping within the limited dimensional constraints of cabinet integration.
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 system effectively dampens a wide range of oscillations, maintaining ACS functionality during earthquakes and man-made impacts while preventing mechanical aging, adhering to design size constraints.
Implementation Method 1
at least one low-frequency oscillation damping unit mounted between the foundation of the structure for installing the base of the structure and the load-bearing girder(-s), on which 3D-compensators are mounted, where the low-frequency oscillation damping unit has a vertical oscillation damper pre-compressed by a predetermined amount
Implementation Method 2
a horizontal oscillation damper in the form of a movable support mounted on a supporting plate through spherical supports
Implementation Method 3
3D-compensators to transmit information about the amplitude-frequency characteristics of the vibration of the floor and the SW&HW base
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The invention relates to means for protection of packaged electronic and electrical equipment, as well as automated control system software and hardware systems (ACS SHS), mostly for NPP, from earthquakes and man-made impacts that lead to mechanical oscillations of foundations of structures, as well as to means of protection against the effects of industrial vibration, which leads to mechanical aging of elements of devices making part of ACS SHS and electrical equipment. The system for damping mechanical oscillations transmitted from the structural part of built structures to packaged electrical equipment and/or software and hardware systems of the NPP automated control system comprises a base on which electrical equipment and/or software and hardware system of the NPP automated control system are installed and/or placed, where the base is a bearing and/or supporting unit, which includes 3D-compensators. The system additionally comprises at least one load-bearing girder, at least one low-frequency oscillation damping unit mounted between the foundation of the structure for installing the base of the structure and the load-bearing girder(-s) on which the 3D-compensators are mounted. The low-frequency oscillation damping unit has a vertical oscillation damper pre-compressed by a predetermined amount, blocked with a lock of the vertical damping activator, and a horizontal oscillation damper in the form of a movable support mounted on a supporting plate through spherical supports, and where the activator is designed in such a way that the vertical oscillation damper is released when the threshold value of the vertical oscillation amplitude is reached. The technical result consists in maintaining the functioning of the electronic equipment and software and hardware systems of the NPP automated control system under man-made impacts and earthquakes with a large scale of the amplitude of oscillations of the foundation, on which the structure with the equipment is located or installed. 2 dependent claims, 5 illustrations.