Tank plan for tank 241-C-104 retrieval testing Page: 4 of 12
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HNF-4094, Rev. 0
Tank 241-C-104 has been selected as a Phase I source tank for High Level Waste sludge
feed for vitrification. The 530 kgal tank contains 295 kgal of sludge, which will be
sluiced to the double-shell tank 241-AY-102. From there, smaller batches of sludge
(100 kgal) will be delivered to the vitrification contractor.
Rheological data are needed to develop engineering plans for the sluicing and pumping
operations. Chemical composition data are needed to verify the ability to meet contract
feed specifications. Other physical data are needed to support computational fluid
dynamics modeling of sludge mobilization using mixer pumps.
The laboratory tests outlined in this Test Plan are designed to obtain all these types of
data. The tests are based on test requirements established by Process Development
Tank C-104 was core-sampled twice in July, 1996, and three times in August, 1998. The
1996 core samples were subjected to a typical suite of analytical measurements, which
are reported in the Tank Characterization Report (Baldwin 1997). They show marked
vertical inhomogeneity in color, texture, and chemical composition. Concentrations of
major elements like aluminum, iron, and zirconium vary by an order of magnitude or
more from one sharply-defined layer to another within the waste.
Core 247 from the 1998 sampling event was reserved for the process testing described in
this Test Plan. Five segments were taken, representing the full depth of the sludge in the
tank. Based on the percent recovery of the samples, core 247 was judged to be a better
representation of the tank inventory than the 1996 core samples. Based on the physical
appearance of the samples, segments 1, 2, 4, and 5 were divided into half-segment
fractions. Segment 3 was divided into four fractions. All of the fractions have been
stored undisturbed in sample jars since early September, 1998. All of the yield strength
measurements will be performed before any sample mixing takes place. Other testing
will be done on composite samples as described in detail later in the Test Plan.
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HERTING, D.L. Tank plan for tank 241-C-104 retrieval testing, report, May 21, 1999; United States. (digital.library.unt.edu/ark:/67531/metadc719099/m1/4/: accessed May 26, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.