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WHC-SD-W100-TI-003 Rev. 0
The third set of waste forms were the large cylinders, 30.5 cm (12 in.)
high with a 15-cm (6-in.) diameter. The large cylinder waste forms were
allowed to cure for 28 days before they were compressive strength tested. The
large cylinder test results are shown in Table 4-2.
Radiation Stability
Two identical waste form cubes for each waste type were irradiated to a
total dose of 108 radiation in a gamma irradiation faci_lity,_ Each_cube- was
then compressive strength tested. Weights for each of the ten samples were
recorded before and after irradiation. No weight change was observed and no
visual change in color or appearance was observed. The compressive strength
test results are shown in Table 4-2.
Biodegradation
Ten waste form cubes, two duplicate cubes for each waste type, were
subject to ideal growth conditions for bacteria, for a period of 21 days.
After this incubation period, the waste forms were tested for compressive
strength. The results are shown in Table 4-2.
T Leachability Index
Cube samples for each waste type were subject to the leachability index
test. The test results are shown in Table 4-2.
Water Immersion
Three cube samples for each waste type were stored in moist conditions
over a period of time. After 14 days, one of the cubes for each of the waste
types was compressive strength tested. After 42 days, the second cube sample
was compressive-strength tested. _After 90 days, the third sample was tested.
The results are shown in Table 4-2.
Thermal Cycling
Two cube samples for each waste stream were heated to +60 °C (140 °F),
cooled, frozen to -40 °C (-40 °F), and then thawed. The cycle was repeated
30 times and then a compressive strength test was performed on each cube
sample. Results are shown in Table 4-2.
Free Liquid
The samples were prepared by pouring the slurry mix into 13 cmZ (2-in 2)
plastic bottles to a 5-cm (2-in.) height, for each of the waste types.
Duplicate samples for each waste type were prepared. At the end of a 24-hour
period each sample was visually inspected for the presence of liquid. The
amount of liquid, if any, was measured. The results are shown in Table 4-1.
EPA (TCLP) Tests
The test involves obtaining an extract from the waste form and analyzing
the extract for toxic constituents. The test results for the TCLP tests are
summarized in Table 4-3.
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