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Technology Factsheet

In-Tank Solids Monitor (ITSM)

Category: Robotics > Characterization and Inspection > Other
Reference # : Model No :

This proprietary in-tank solids monitoring system is designed to measure the percent solids by weight entrained in two-phase fluids in a slurry range of 2 to 18 weight percent solids. Measuring percent solids by weight is a critical step in preventing plugging during high-level waste transfer, and this technology provides a technology solution where no previous commercial technologies existed.

ARC at FIU designed, fabricated and tested a real-time particulate concentration monitor that uses two Coriolis flowmeters and a crossflow filter. The In-Tank Solids Monitor (ITSM) is 15-feet in length and is capable of deployment through an existing 8-inch tank inspection port, can be positioned at various elevations within the tank, can withstand operating temperatures up to 85 degrees Celsius, and is remotely controlled. This technology is capable of providing real-time measurement of particulate concentrations in liquid-solid slurries, despite dynamic disturbances.

The verification tests demonstrated that the system is capable of providing accurate weight percent solids concentration measurements of slurry with the same rheological properties as the slurry found in the Hanford HLW tanks. During the tests, the ITSM provided accurate measurements of the actual weight percent solids of the slurry. The system also demonstrated it was capable of detecting changes in the slurry concentration within 30 seconds.


Increased accuracy in estimating the amount of solids transferred, satisfying Hanford's requirement of monitoring the total solids transferred through cross-site transfer lines. The ITSM can assist site engineers by providing more detailed characterization of the waste slurry prior to transport of the tank waste: reducing the risk of plugging in pumps and pipelines, reducing cost associated with repair, and reducing the risk of hazardous exposure to site personnel and the environment.


This technology was designed, developed, and tested at the Applied Research Center at FIU. It has not been deployed in a radioactive environment at a DOE facility.




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