Transfer and Storage of Molten Salt for the Pyroprocessing of Used Nuclear Fuel

2016 ◽  
Vol 3 (1) ◽  
Author(s):  
Matthew C. Morrison ◽  
Kenneth J. Bateman
Keyword(s):  
National Laboratory ◽  
Temperature Threshold ◽  
Storage Container ◽  
Idaho National Laboratory ◽  
Used Nuclear Fuel ◽  
Fail Safe ◽  
Cooling Coil ◽  
And Storage ◽  
Salt Flow ◽  
Preset Temperature

A vacuum-induced salt transfer and storage (VISTAS) system is being evaluated to improve transfer and storage of molten electrorefiner (ER) salts at Idaho National Laboratory (INL). Salt is transferred by vacuum through a heated drawtube into a storage container. To control salt flow, a redundant level switch triggered by salt thermal conductivity and a preset temperature threshold activate a solenoid, stopping argon supply to the vacuum pump. A fail-safe cooling coil freezes the salt, halting its flow if the level switch malfunctions. The VISTAS system allows safe, timely salt transfer and reduces the storage footprint of current salt-removal methods.

Transfer and Storage of Molten Salt for the Pyroprocessing of Used Nuclear Fuel

2014 ◽  
Author(s):  
Matthew C. Morrison ◽  
Kenneth J. Bateman
Keyword(s):  
Molten Salt ◽  
National Laboratory ◽  
Salt Bath ◽  
Vacuum Pump ◽  
Material Surface ◽  
Temperature Threshold ◽  
Used Nuclear Fuel ◽  
Cooling Mechanism ◽  
Cooling Coil ◽  
And Storage

The transfer and storage of molten salts are being examined to support electrorefining operations at the Idaho National Laboratory. Two important factors that will need to be considered when removing molten salt from either of the two electrorefiners are (1) how to remove salt in a safe and timely manner and (2) how to store significant amounts of electrorefiner salt. A Vacuum Induced Salt Transfer and Storage (VISTAS) system is being evaluated to address these two important factors. This process draws a vacuum in a container through the use of a venturi vacuum pump. The end of a heated drawtube is inserted into the molten salt bath and the molten salt is pulled into the container. A redundant level switch triggered both by the thermal conductivity of the salt and a preset temperature threshold then activates a solenoid, which turns off the argon supply to the venturi vacuum pump, stopping the flow of molten salt. A cooling coil is incorporated into the salt transfer equipment design as a failsafe if the level switch was to fail. A full-scale version of the conceptual design (43 kg capacity) was fabricated to test the vacuum draw salt withdrawal method in an inert argon atmosphere glovebox. In addition, a custom molten salt furnace was designed and fabricated within the glovebox to represent the actual size of an electrorefiner port. Initial testing of the VISTAS system was very successful. The salt was transferred at a consistent rate and the level switch reliably stopped flow. Because the system has a failsafe cooling mechanism, it is considered to have low risk of a salt spill. The container was found to improve storage density, reduce the diffusion of moisture, and reduce material surface area when compared to current options. This system appears to be well suited for this application and further development is recommended.

Experience With Damaged Spent Nuclear Fuel at U.S. DOE Facilities

2006 ◽  
Author(s):  
Brett Carlsen ◽  
Denzel Fillmore ◽  
Roger L. McCormack ◽  
Robert Sindelar ◽  
Timothy Spieker ◽  
...  
Keyword(s):  
Nuclear Fuel ◽  
Spent Nuclear Fuel ◽  
National Laboratory ◽  
Equipment Design ◽  
Lessons Learned ◽  
Nuclear Fuels ◽  
Idaho National Laboratory ◽  
Safe Storage ◽  
And Storage ◽  
Storage Facilities

This report summarizes some of the challenges encountered and solutions implemented to ensure safe storage and handling of damaged spent nuclear fuels (SNF). It includes a brief summary of some SNF storage environments and resulting SNF degradation, experience with handling and repackaging significantly degraded SNFs, and the associated lessons learned. This work provides useful insight and resolutions to many engineering challenges facing SNF handling and storage facilities. The context of this report is taken from a report produced at Idaho National Laboratory and further detailed information, such as equipment design and usage, can be found in the appendices to that report.

scholarly journals ATLAS Event Store and I/O developments in support for Production and Analysis in Run 3

2020 ◽  
Vol 245 ◽  
pp. 02031
Author(s):  
Marcin Nowak ◽  
Peter van Gemmeren ◽  
Jack Cranshaw
Keyword(s):  
Event Processing ◽  
Analysis Model ◽  
Storage Container ◽  
Compression Algorithms ◽  
Event Selection ◽  
Atlas Experiment ◽  
Processing And Storage ◽  
And Storage ◽  
Processing Framework ◽  
Entry Number

During the long LHC shutdown, ATLAS experiment is preparing several fundamental changes to its offline event processing framework and analysis model. These include moving to multi-threaded reconstruction and simulation and reducing data duplication during derivation analysis by producing a combined mini-xAOD stream. These changes will allow ATLAS to take advantage of the higher luminosity at Run 3 without overstraining processing and storage capabilities. They also require significant improvements to the underlying event store and the I/O framework to support them. These improvements include: 1) an overhaul of the Run 2 I/O framework to be thread-safe and minimize serial bottlenecks, 2) introduction of new immutable references for object navigation, which don’t rely on storage container entry number so data can be merged in-memory, 3) using filter decisions to annotate combined output stream to allow for fast event selection on input and 4) selecting optimized compression algorithms and settings to allow efficient reading of event selections.

scholarly journals Idaho National Laboratory Cultural Resource Management Annual Report FY 2006

2007 ◽  
Author(s):  
Clayton F. Marler ◽  
Julie Braun ◽  
Hollie Gilbert ◽  
Dino Lowrey ◽  
Brenda Ringe Pace
Keyword(s):  
Resource Management ◽  
Annual Report ◽  
National Laboratory ◽  
Cultural Resource Management ◽  
Cultural Resource ◽  
Idaho National Laboratory
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