Dual-Shielding RI Manufacturing Apparatus for Faster Maintenance
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Solution Overview
Problem
In RI manufacturing apparatuses, the need to shield radiation from activated targets during maintenance prolongs shutdown times and increases worker exposure due to the requirement for radiation attenuation, which is inefficient with traditional self-shielding systems.
Innovation Solution
The implementation of a dual-shielding system where a target shield, positioned further inside than the built-in shield, provides additional radiation shielding, allowing for maintenance without waiting for radiation attenuation and reducing exposure risks, while the built-in shield uses less material to achieve equivalent shielding effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a built-in shield surrounds the accelerator to shield radiation, then radiation shielding is provided, but maintenance access requires waiting for radiation attenuation which prolongs shutdown time
Solution Approach 1:
The shielding system is divided into two independent segments: a built-in shield surrounding the accelerator and a target shield surrounding the target. This segmentation allows the target shield to be opened independently for maintenance without requiring the built-in shield to be opened, enabling maintenance access while maintaining radiation protection through the built-in shield.
Solution Approach 2:
The target shield acts as an intermediary shielding structure between the built-in shield and the target. It provides additional radiation protection specifically for the target area, allowing maintenance personnel to work inside the built-in shield without direct exposure to target radiation, thus eliminating the need to wait for radiation attenuation.
2Object-affected harmful factors
If a target shield is added inside the built-in shield, then radiation shielding from activated targets is improved, but device complexity increases
Solution Approach 1:
The shielding system is divided into two independent segments: a built-in shield surrounding the accelerator and a target shield surrounding the target. This segmentation allows the target shield to be opened independently for maintenance without requiring the built-in shield to be opened, enabling maintenance access while maintaining radiation protection through the built-in shield.
Solution Approach 2:
The target shield provides localized radiation protection specifically around the target area where activated targets are present. This local shielding approach concentrates protective measures where they are most needed, rather than requiring the entire built-in shield to be removed or opened for maintenance.
3Object-affected harmful factors
If the built-in shield uses more shielding material, then radiation shielding effectiveness is improved, but weight and cost increase
Solution Approach 1:
The shielding system is divided into two independent segments: a built-in shield surrounding the accelerator and a target shield surrounding the target. This segmentation allows the target shield to be opened independently for maintenance without requiring the built-in shield to be opened, enabling maintenance access while maintaining radiation protection through the built-in shield.
Solution Approach 2:
The target shield provides localized radiation protection specifically around the target area where activated targets are present. This local shielding approach concentrates protective measures where they are most needed, rather than requiring the entire built-in shield to be removed or opened for maintenance.
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
This configuration enables safer and faster maintenance by shielding radiation from the target, reducing shutdown times and minimizing worker exposure, while optimizing the use of shielding materials.
Implementation Method 1
a target shield that is a wall body which is disposed between the built-in shield and the accelerator and surrounds the target to shield the radiation
Implementation Method 2
a built-in shield that is a wall body which surrounds the accelerator and the target to shield radiation
Data Source
AI summary
An RI manufacturing apparatus includes: an accelerator which accelerates charged particles; a target which is irradiated with the charged particle accelerated by the accelerator, thereby manufacturing a radioactive isotope; a built-in shield that may be a wall body which surrounds the accelerator and the target to shield radiation; and a target shield that may be a wall body which is disposed between the built-in shield and the accelerator and surrounds the target to shield the radiation.