Engineering Analysis And Design

 

 

K West Basin Water Treatment System

Q-Metrics provided the thermal and gas generation safety analysis for the water treatment system installed in the K West Basin.  The analysis demonstrated that the system temperatures remained below 50°C during normal and upset conditions and that the hydrogen gas concentration remained below 25% of the lower flammability limit.  The work was conducted in support of Chem Nuclear Systems and Duke Engineering in July and August of 1997.  The system, which covered a knockout pot, 10 settling tanks, the ion exchange module, the clarifier, and three filtration units, filters and collects particulates and soluble contaminants to be generated by the cleaning and loading of the 50,000 fuel elements in the K West Basin.  Without this equipment, the water clarity and working conditions would deteriorate during the removal and cleaning of the fuel elements.  The system layout within the basin is illustrated below.   

The thermal and gas generation calculations involved working with project personnel to establish the appropriate reaction rate equations for chemical heat and gas generation, the bounding reaction areas for the contents, and the operational constraints to be applied to the analysis. Since the filtration units contained a mixture of filtration medium and sludge, the development of accurate effective thermal properties was critical to the predictions of heat and gas generation rates.  This calculation was further complicated by the fact that the filtration medium varied in composition from coarse to fine along the length of the unit.  The effective thermal properties for each layer within the filtration units was computed assuming porous medium assumptions and the thermal properties for each material contained within that layer.  Normal and upset conditions were evaluated.

The analysis successfully demonstrated the safety of the proposed system design for handling the water treatment within the K West Basin.

Home Up Feedback Contents Search
Send mail to webmaster@qmetrics.com with questions or comments about this web site.
Copyright © 2002 Q-Metrics, Inc.
Last modified: September 06, 2002