Evaluation of DWPF canister closure welds containing ceramic rings of lava A, alumina, or steatite [electronic resource].
- Washington, D.C. : United States. Dept. of Energy, 1994.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- 8 pages : digital, PDF file
- Additional Creators:
- Westinghouse Savannah River Company
United States. Department of Energy
United States. Department of Energy. Office of Scientific and Technical Information
- A ceramic ring is used to ensure proper positioning of the weld plug for the Defense Waste Processing Facility (DWPF) final weld. The weld plug is assembled by sandwiching a ceramic ring between two stainless steel pieces. The function of the ceramic ring is to center the weld plug in the nozzle opening. This ring must be electrically insulating to ensure that current flow and consequently welding occur only between the nozzle and the top piece of the weld plug. In the past, Lava A, a naturally occurring material, has been used to fabricate these rings. Testing was performed to identify compositionally controllable ceramic rings to replace the current lava A weld plug ring material. A series of tests were performed to assure that a change in ring material would not detrimentally affect the final canister closure weld integrity. Alumina and steatite rings proved functionally equivalent to the lava A ceramic rings. These materials also had a lower moisture content which reduces the Potential for internal localized corrosion. The need for careful cleaning of the stainless steel weld Plug components was also identified, resulting in more stringent control of the cleaning process.
- Published through SciTech Connect.
SPECTRUM `94: international nuclear and hazardous waste management conference,Atlanta, GA (United States),14-18 Aug 1994.
Herman, D.T.; Harbour, J.R.; Marra, J.C.; Eberhard, B.J.
- Funding Information:
View MARC record | catkey: 14417060