Nuclear Wastes Technologies for Separations and Transmutation (1996) / Chapter Skim
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E DEFENSE WASTES -- ADDITIONAL INFORMATION
E DEFENSE WASTES -- ADDITIONAL INFORMATION
Pages 191-200
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From page 191... ...
The plant as currently designed has a capacity of 372 canisters per year and a design life of 40 years, yielding total plant production of 14,880 canisters if the design production rate is achieved. (European vitrification plants are not meeting design production rates due to melter design and material problems, coupled with melter replacement difficulties.
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From page 192... ...
The extensive separations process offers the prospect that less vitrification plant capacity would be required to produce the reduced number of canisters resulting from the use of that process. For chemical process plants, the plant size should decrease with the cube root of throughput, implying a rough scaling factor of 0.33.
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From page 193... ...
.. Option2 | $560,000 per canister l Option 3 | $2.00 million per canister SAVANNAH RIVER SITE PLANS FOR A DEFENSE WASTE PROCESSING FACILITY Members of the STATS Subcommittee on Separations visited the Savannah River Site in South Carolina in February 1992, and were presented with plans for, and the status of, conversion of existing defense wastes at the site into low-level saltstone for onsite storage and high-level glass in canisters ("glass logs")
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From page 194... ...
A diagram of the process is shown in Figure Eel. WASTE PROCESSING IN TANK FARMS The SRS waste is currently stored onsite in carbon steel tanks and exists in three forms: sludge, salt solution, and saltcake (formed through concentration of salt solution EMaher et al., 19811~.
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From page 196... ...
For a nominal pour rate of 100 kg/in and a nominal glass melt weight of 6,500 kg in the melter, the average residence time in the melter is about 65 hours. The dome of the melter contains four pairs of resistance lid heaters that are used to provide the heat for stand-up as weld as any supplemental heat required during glass production.
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From page 197... ...
CLOSED CIRCUIT ~ E _ DOW HEAURS it/ "- AT ~_=~ , ·, a. RISER / POUR SPOUT MELTER CHARACTERISTICS Weight of assembly filled with glass Total melter volume Average glass volume G1 ass height along sidewall Glass height along centerline Melter diameter Pour spout inside diameter Riser angle 197 73,000 kg 5.5 m3 2.5 m3 0.86 m 0.95 m 1.8 m 5 cm 25° 30'
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From page 198... ...
The weld produced is sufficiently leaktight based on experimental evidence, to approximately ~ x lO~ 9 cc-atm/s of helium and of comparable strength to the base metal to meet the required specification. INTERIM STORAGE The filled, decontaminated, and sealed canisters are moved by a shielded transport vehicle and stored In the glass waste storage building.
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From page 199... ...
~ 987. Civilian radioactive waste management; calculating nuclear waste hind disposal fees for Department of Energy defense program waste.
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From page 200... ...
1986. Design and construction of the Defense Waste Processing Facility project at the Savannah River Plant.
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