Compact Internal Shock Absorption for Radioactive Packages With Dual Damping
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Solution Overview
Problem
Existing internal shock-absorption systems for packages transporting radioactive materials are oversized due to a uniform design criterion based on the lowest acceptable maximum deceleration, leading to inefficiencies in bulk and cost, and do not adequately address the varying deceleration needs of storage devices and radioactive elements.
Innovation Solution
A dual damping system is implemented, where each damping device is designed independently for the storage device and radioactive elements, with distinct parameters to accommodate their respective deceleration capabilities, allowing for compact and efficient energy absorption without bumping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a uniform internal shock-absorption system is designed based on the lowest acceptable maximum deceleration, then the safety of the radioactive content is ensured, but the system becomes oversized and inefficient in terms of bulk and cost
Solution Approach 1:
The internal shock-absorption system is segmented into multiple independent damping devices, each dedicated to protecting a specific radioactive element or group of elements. This segmentation allows each device to be optimized for the specific mass and deceleration requirements of its protected element, rather than using a single oversized system designed for the worst-case scenario of all elements simultaneously.
Solution Approach 2:
Each damping device is designed with local quality tailored to its specific protective role, with crushing stress and active surface area parameters optimized for the mass and deceleration capabilities of the particular radioactive element it protects. This allows different parts of the system to have different properties suited to their specific functions, reducing overall system size while maintaining safety.
2Reliability
If the internal shock-absorption system is designed to protect all radioactive elements simultaneously, then comprehensive protection is achieved, but the system complexity and cost increase
Solution Approach 1:
The protection system is divided into separate, independent damping devices for different radioactive elements, where each device can be designed, manufactured, and analyzed independently. This segmentation reduces the overall complexity by breaking down a complex multi-element protection problem into simpler, manageable sub-problems.
Solution Approach 2:
Each damping device is designed to provide sufficient protection for its specific radioactive element without requiring excessive capacity. By designing each device to match the specific requirements of its protected element rather than oversizing all devices to protect every element, the system achieves comprehensive protection with reduced complexity.
3Volume of stationary object
If damping devices are designed with high crushing stress to reduce size, then compactness is improved, but the deceleration of radioactive elements during fall increases potentially causing damage
Solution Approach 1:
The crushing stress of each damping device is locally optimized based on the specific mass and deceleration capabilities of the radioactive element it protects. lighter elements are paired with lower crushing stress devices that produce gentler deceleration, while heavier elements can tolerate higher crushing stress and faster deceleration. This local optimization achieves compactness without exceeding the deceleration limits of protected elements.
Solution Approach 2:
The design parameters of damping devices, specifically crushing stress and active surface area, are changed and optimized for each radioactive element based on its mass and acceptable deceleration range. This parameter optimization allows the system to achieve compactness while maintaining deceleration within safe limits for each protected element.
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 dual damping system enhances compactness and efficiency by optimizing damping devices for the specific deceleration requirements of storage devices and radioactive elements, reducing overall size and maintaining effective energy absorption.
Implementation Method 1
damping device by plastic deformation for damping the storage device
Data Source
AI summary
A package comprising radioactive content and packaging for transporting and/or storing the content, the packaging comprising an internal shock-absorption system housed in the confinement chamber between the radioactive content and an axial blocking member of the chamber, the radioactive content comprising a storage device and one or more radioactive elements. The internal shock-absorption system comprises a first shock-absorption device for absorption by plastic deformation in order to provide shock absorption for the storage device, and a second shock-absorption device for absorption by plastic deformation associated with a radioactive assembly formed of one or more radioactive elements, the first and second shock-absorption devices being designed to operate independently of each other and to take account of the maximum decelerations that can be withstood by the storage device and the radioactive elements accommodated in the device.