Radionuclide Generation System Using Reactor Instrumentation Tubes
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Solution Overview
Problem
The limited number of facilities for commercial radionuclide production and the need for alternative sites to efficiently produce radionuclides, as existing systems are not optimized for radionuclide generation during nuclear reactor operation.
Innovation Solution
A radionuclide generation system that modifies existing or planned ball measuring systems in nuclear reactors to insert and remove irradiation targets, utilizing an instrumentation and control unit linked to an online core monitoring system to calculate optimum irradiation times based on real-time reactor parameters, and includes sensors for coolant detection and automated valve control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If existing instrumentation tubes are used for both neutron detection and radionuclide production, then device complexity is reduced, but manufacturing precision and reliability of radionuclide production deteriorate
Solution Approach 1:
The system divides the irradiation target into separable components: a spherical target body and an integrated drive system with positioning mechanisms. This segmentation allows precise control of the target's axial position within the instrumentation tube, enabling accurate irradiation depth control while maintaining a relatively simple overall structure.
Solution Approach 2:
The target drive system incorporates dynamic positioning capabilities with actuators that can adjust the target's position along the instrumentation tube axis in real-time. This dynamic adjustment allows optimization of irradiation parameters during the process, improving manufacturing precision without requiring a completely complex static structure.
2Ease of manufacture
If ball measuring systems are modified for radionuclide production, then ease of manufacture is improved, but reliability of the system deteriorates
Solution Approach 1:
The system design enables the instrumentation tube and drive mechanism to serve dual functions: traditional neutron detection operations and radionuclide production. The target can be positioned and irradiated within the existing tube structure, while the same infrastructure supports both measurement and production modes, improving ease of manufacture through multi-functionality.
Solution Approach 2:
The system incorporates redundant positioning sensors and control mechanisms that provide backup capabilities. Before irradiation begins, multiple sensors verify target position and system integrity, preventing unreliable operation. This beforehand verification cushioning ensures reliability while maintaining the adapted ball measuring system structure.
3Productivity
If automated drive systems are implemented for target insertion and removal, then productivity is improved, but device complexity increases
Solution Approach 1:
The target drive system is designed with automated insertion and removal capabilities that operate without continuous manual intervention. The actuator system automatically positions the target at the required depth, maintains it during irradiation, and retrieves it afterward. This self-service automation improves productivity by eliminating manual operations while keeping the drive mechanism relatively simple through standardized components.
4Manufacturing precision
If real-time reactor state monitoring is integrated for irradiation optimization, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The system integrates feedback mechanisms that continuously monitor reactor state parameters such as neutron flux and power level. This real-time feedback information is used by the control system to dynamically adjust target position and irradiation timing, optimizing the production process. The feedback loop improves manufacturing precision by adapting to actual reactor conditions while maintaining manageable control system complexity through proven control algorithms.
Data Source
AI summary
A radionuclide generation system including a tube system configured to permit insertion and removal of irradiation targets into an instrumentation finger of a nuclear reactor, and an irradiation target drive system configured to insert the irradiation targets into the instrumentation finger and to remove the irradiation targets from the instrumentation finger. The radionuclide generation system further includes an instrumentation and control unit which is linked to an online core monitoring system and being configured to calculate optimal irradiation locations for the irradiation targets based on the actual state of the reactor as provided by the online core monitoring system.