Potentiometric Sensor for Molten Salt Actinide Monitoring
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Solution Overview
Problem
Current methods for monitoring actinide concentrations in molten salts during pyroprocessing are time-consuming and not real-time, necessitating a more efficient and instantaneous on-line monitoring system for electrorefining processes.
Innovation Solution
A potentiometric sensor with a cathode and anode configuration that uses multiple voltage points within the cathode and a constant anode voltage to accurately determine the concentration of target ions like UCl3 in molten salts, providing a summary voltage that corresponds to the ion concentration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If chemical analysis is used to monitor actinide concentrations, then measurement accuracy is maintained, but the monitoring speed and real-time capability deteriorate
Solution Approach 1:
The patent replaces traditional chemical analysis methods with an electrochemical sensor system that uses potentiometric measurement principles. The sensor employs ion-selective membranes and electrochemical cells to directly measure actinide ion concentrations in molten salts, substituting mechanical/chemical laboratory analysis with an automated electrochemical detection system that provides real-time data without sacrificing measurement accuracy
Solution Approach 2:
The patent introduces ion-selective membranes as intermediary elements between the molten salt environment and the measurement system. These membranes selectively transport specific actinide ions while blocking other species, enabling the sensor to accurately distinguish and measure target ion concentrations without interference from other components in the complex molten salt mixture
2Device complexity
If traditional sensors are used in molten salt environments, then device simplicity is maintained, but the sensor reliability and measurement accuracy deteriorate due to harsh conditions
Solution Approach 1:
The patent constructs the sensor using composite material structures, including ion-selective membranes combined with electrochemically stable electrode materials, and protective housing materials resistant to molten salt corrosion. This composite approach enables the sensor to withstand the harsh thermal and chemical environment of molten salts while maintaining measurement functionality and long-term reliability
Solution Approach 2:
The patent creates a protected measurement environment within the sensor assembly that isolates sensitive electrochemical components from direct exposure to aggressive molten salt conditions. The sensor design incorporates barriers and protective layers that maintain a more stable microenvironment around the measurement elements, preserving sensor reliability without requiring overly complex external protection systems
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
Enables accurate and instantaneous on-line monitoring of actinide concentrations, improving the efficiency and safety of pyroprocessing operations by providing a reliable and real-time measurement of UCl3 and PuCl3 concentrations.
Implementation Method 1
The open circuit potential mathematically corresponds to the concentration of the target ion
Data Source
AI summary
According to one aspect of the invention, a potentiometric sensor having a cathode and an anode. The cathode is configured to provide a summary voltage representative of at least two voltage points. The anode is configured to provide a first voltage. The cathode is in communication with the anode by a first electrolyte forming an open circuit having an open circuit potential. Within the first electrolyte is a concentration of a target ion. The open circuit potential mathematically corresponds to the concentration of the target ion.