Radium Target Reuse Through Repeated Irradiation and Separation
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Solution Overview
Problem
Current methods for producing radioisotopes and recycling nuclear fuel require extensive dissolution and destruction of the target material, leading to inefficiencies, waste generation, and increased costs due to the loss of unreacted starting material and additional processing steps.
Innovation Solution
The method involves selecting a target material and separation chemistry to allow repeated irradiation and separation operations without dissolving the material, using supercritical fluids or aqueous fluids to extract radioisotopes while preserving the target material's integrity, enabling multiple cycles of irradiation and separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the target material is dissolved and destroyed to separate radioisotopes, then the separation and purification of radioisotopes is achieved, but the valuable starting material is lost and additional processing steps are required
Solution Approach 1:
The patent extracts only the radioisotope products from the irradiated target material using selective dissolution and chemical separation techniques, leaving the bulk target material intact for reuse. This allows recovery of radioisotopes while preserving the valuable starting material for subsequent irradiation cycles.
Solution Approach 2:
The patent recovers and reuses the target material after radioisotope extraction. The target material is processed to remove activated impurities and then re-irradiated, creating a closed-loop system that minimizes material loss and maximizes utilization of the starting material.
2Productivity
If the target material is dissolved and processed extensively to recover radioisotopes, then the radioisotope recovery is achieved, but additional processing steps and waste generation increase
Solution Approach 1:
The patent segments the processing into distinct stages: selective dissolution of radioisotopes from the target, separation and purification, and target material regeneration. This modular approach allows each stage to be optimized independently and facilitates repeated cycles with minimal additional complexity.
Solution Approach 2:
The patent establishes a continuous cycle where target material is irradiated, processed to recover radioisotopes, regenerated, and re-irradiated. This continuous operation eliminates the need for extensive reprocessing between cycles and maintains high productivity through repeated use of the same target material.
3Quantity of substance
If the target material is destroyed and reformed after each irradiation, then the radioisotopes can be recovered, but time and additional processing are required
Solution Approach 1:
The patent performs preliminary regeneration of the target material during the separation process, preparing it for the next irradiation cycle before the current cycle is complete. This overlapping of processes reduces total processing time and allows continuous production of radioisotopes.
Solution Approach 2:
The patent maintains continuous operation by regenerating target material in advance and re-irradiating it without complete shutdown between cycles. This continuous action maximizes radioisotope production while minimizing idle time and processing delays.
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 approach significantly increases efficiency and reduces costs by minimizing waste and preserving valuable starting material, allowing for repeated use and reducing the need for additional processing steps.
Implementation Method 1
a radium target is repeatedly irradiated to produce one or more desired radioisotopes
Implementation Method 2
the irradiated target is then dissolved and the produced radioisotopes are separated and recovered from the dissolved target
Data Source
AI summary
Targetry coupled separation refers to enhancing the production of a predetermined radiation product through the selection of a target (including selection of the target material and the material's physical structure) and separation chemistry in order to optimize the recovery of the predetermined radiation product. This disclosure describes systems and methods for creating (through irradiation) and removing one or more desired radioisotopes from a target and further describes systems and methods that allow the same target to undergo multiple irradiations and separation operations without damage to the target. In contrast with the prior art that requires complete dissolution or destruction of a target before recovery of any irradiation products, the repeated reuse of the same physical target allowed by targetry coupled separation represents a significant increase in efficiency and decrease in cost over the prior art.