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Related Experiment Video

Updated: Jan 21, 2026

Development of Sulfidogenic Sludge from Marine Sediments and Trichloroethylene Reduction in an Upflow Anaerobic Sludge Blanket Reactor
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Compact Viscometer Prototype for Remote In Situ Analysis of Sludge.

Tomas Fried1,2, David Cheneler3, Stephen D Monk3

  • 1Engineering Department, Lancaster University, Lancaster LA1 4YW, UK. t.fried@lancaster.ac.uk.

Sensors (Basel, Switzerland)
|July 31, 2019
PubMed
Summary

A new, compact device analyzes sludge rheological properties in legacy storage tanks without sample extraction. This robust tool uses commercial components and rapid prototyping for safe, in-situ characterization during decommissioning.

Keywords:
nuclear decommissioningrapid prototypingrheology

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Area of Science:

  • Nuclear Engineering
  • Materials Science
  • Chemical Engineering

Background:

  • Legacy storage tanks and silos at Sellafield contain sludge with uncertain physical properties.
  • Accurate characterization of sludge shear behavior, density, and temperature is crucial for safe decommissioning.
  • Limited access and hazardous conditions hinder traditional sampling and analysis methods.

Purpose of the Study:

  • To develop a cost-effective, compact, and robust device for in-situ analysis of sludge rheological properties.
  • To enable characterization without the need for sample extraction from hazardous environments.
  • To support safe and efficient decommissioning of legacy nuclear facilities.

Main Methods:

  • Development of a prototype device using commercial off-the-shelf (COTS) components and rapid prototyping.
  • Integration of a microcontroller for remote control and data acquisition.
  • Testing with a sludge simulant to establish a benchmark for rheological measurements.

Main Results:

  • A prototype device capable of measuring sludge shear parameters has been successfully developed.
  • The device is designed to be compact, fitting through a 75 mm opening for enhanced deployment.
  • Initial analysis of a test material provides a benchmark for future rheological measurements.

Conclusions:

  • The developed device offers a viable solution for in-situ rheological characterization of hazardous sludge.
  • Its compact and robust design facilitates deployment in challenging legacy storage environments.
  • This technology can significantly improve safety and efficiency in nuclear decommissioning operations.