Filtration efficiency of the plant sand filter

Technical Report · Thu Jun 15 04:00:00 EDT 1950

DOI:https://doi.org/10.2172/6820266· OSTI ID:6820266

Blasewitz, A G

The indicated decrease in the filtration efficiency of the T Plant sand filter was investigated. It was determined that the anomalous values were a direct result of the condensation of water in the ductwork seals and the sand filter. The consequent high humidity of the ventilation air downstream from the sand filter caused the deposition of water on the CWS monitoring filter. This increased the retention of gaseous I{sup 131} or volatile iodine compounds on the monitor. The recorded increase in contamination level at the downstream position was due to this factor and not a change in the removal efficiency of particulate matter. The humidity and efficiency data obtained during this study have revealed that on approximately April 15 all the condensed water vapor had been removed from the filter by evaporation, and coincident with this occurrence all operating characteristics of the unit returned to normal. 3 figs., 4 tabs.

• Research Organization: Hanford Works, Richland, WA (USA)
• Sponsoring Organization: DOE/NE
• DOE Contract Number: AC06-87RL10930
• OSTI ID: 6820266
• Report Number(s): HW-18094; ON: DE90012851
• Country of Publication: United States
• Language: English

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CONTAMINATION
DAYS LIVING RADIOISOTOPES
DUCTS
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RADIATION MONITORING
RADIOACTIVITY TRANSPORT
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SEPARATION PROCESSES
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