KE Basin Sludge Flocculant Testing

Technical Report · Wed Jun 23 04:00:00 EDT 2004

DOI:https://doi.org/10.2172/15007925· OSTI ID:15007925

Schmidt, Andrew J; Hallen, Richard T; Muzatko, Danielle S; Gano, Sue

In the revised path forward and schedule for the K Basins Sludge Retrieval and Disposal Project, the sludge in K East (KE) Basin will be moved from the floor and pits and transferred to large, free-standing containers located in the pits (so as to isolate the sludge from the basin). When the sludge is pumped into the containers, it must settle fast enough and clarify sufficiently that the overflow water returned to the basin pool will not cloud the water or significantly increase the radiological dose rate to the operations staff as a result of increased suspended radioactive material. The approach being evaluated to enhance sludge settling and speed the rate of clarification is to add a flocculant to the sludge while it is being transferred to the containers. In February 2004, seven commercial flocculants were tested with a specific K Basin sludge simulant to identify those agents that demonstrated good performance over a broad range of slurry solids concentrations. From this testing, a cationic polymer flocculant, Nalco Optimer 7194 Plus (7194+), was shown to exhibit superior performance. Related prior testing with K Basin sludge and simulant in 1994/1996 had also identified this agent as promising. In March 2004, four series of jar tests were conducted with 7194+ and actual KE Basin sludge (prepared by combining selected archived KE sludge samples). The results from these jar tests show that 7194+ greatly improves settling of the sludge slurries and clarification of the supernatant.

• Research Organization: Pacific Northwest National Lab., Richland, WA (US)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 15007925
• Report Number(s): PNNL-14730; 820101000
• Country of Publication: United States
• Language: English

Related Subjects

12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
CEMENT
CLARIFICATION
CONTAINERIZATION
FLOCCULANT
FLOCCULATION
FLOCCULATION TESTING
FUEL STORAGE POOLS
GROUT
HANFORD K EAST (KE) BASIN SLUDGE
HANFORD RESERVATION
JAR TESTS
PARTICULATE
PERFORMANCE TESTING
POLYMER
SEDIMENTATION
SLUDGE SETTLING
SLUDGE SIMULANT
SLUDGES
WATER QUALITY