Molten Salt Sampling With Hermetic Sample Containment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional salt sampling systems fail to maintain an inert environment or hermetic seal when collecting samples from high-temperature, corrosive, or nuclear process fluids, such as molten salt in reactors, leading to undesirable reactions.
Innovation Solution
A salt sampling system with a containment cell and plunger that forms a hermetic seal around the molten salt sample, using isolation valves to isolate sampling and extraction shafts, and transfer systems to move the apparatus safely for analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional sampling approaches are used to retrieve fuel salt from a molten salt reactor, then the salt sample can be collected, but the inert environment or hermetic seal cannot be maintained, leading to undesirable reactions
Solution Approach 1:
The sampling system is divided into three isolated segments: a sampling shaft for collecting the salt sample, an isolation tunnel for transferring the sample, and an extraction shaft for removing the sample. Isolation valves between these segments maintain hermetic seals, preventing undesirable reactions while allowing sample collection and transfer.
Solution Approach 2:
An isolation tunnel serves as an intermediary chamber between the sampling shaft and extraction shaft. This intermediate space allows the salt sampling apparatus to be transferred while maintaining isolation from both the reactor environment and the external atmosphere, preventing undesirable reactions.
2Reliability
If a hermetic seal is maintained around the molten salt sample during collection and transfer, then undesirable reactions are prevented, but the system complexity increases with isolation valves and sealed chambers
Solution Approach 1:
The complex isolation system is segmented into modular components (sampling shaft, isolation tunnel, extraction shaft) that can be independently managed. Each segment has its own isolation valves, allowing the hermetic seal to be maintained through a structured, manageable system rather than a single complex barrier.
3Ease of operation
If the salt sampling apparatus is moved from the sampling shaft to the extraction shaft through an isolation tunnel, then the sample can be extracted for analysis, but the transfer process requires complex transfer systems with pulleys and conveyors
Solution Approach 1:
The isolation tunnel acts as an intermediary transfer space that simplifies the movement of the salt sampling apparatus. The apparatus can be moved through the tunnel using relatively simple mechanisms (pulleys, conveyors) without compromising the hermetic seal, as the tunnel provides a controlled intermediate environment.
Data Source
AI summary
A salt sampling apparatus includes a containment cell and plunger. The containment cell defines a cell volume, an upper cell mating feature and a lower cell mating feature within the cell volume, and a through-bore extending completely through the containment cell. The plunger is arrangeable within the cell volume along the through-bore and defines a shaft portion, and an upper plunger mating feature and a lower plunger mating feature. The lower plunger mating feature defines a well about the shaft portion configured to receive a volume of a molten salt material. The plunger is moveable between a first position in which the well is positioned substantially out of the cell volume, and a second position in which the well is positioned substantially in the cell volume with the well sealed within the containment volume by the engagement of the containment cell and the plunger.