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Glass strategy: Hanford’s enhanced waste glass program
The mission of the Department of Energy’s Office of River Protection (ORP) is to complete the safe cleanup of waste resulting from decades of nuclear weapons development. One of the most technologically challenging responsibilities is the safe disposition of approximately 56 million gallons of radioactive waste historically stored in 177 tanks at the Hanford Site in Washington state.
ORP has a clear incentive to reduce the overall mission duration and cost. One pathway is to develop and deploy innovative technical solutions that can advance baseline flow sheets toward higher efficiency operations while reducing identified risks without compromising safety. Vitrification is the baseline process that will convert both high-level and low-level radioactive waste at Hanford into a stable glass waste form for long-term storage and disposal.
Although vitrification is a mature technology, there are key areas where technology can further reduce operational risks, advance baseline processes to maximize waste throughput, and provide the underpinning to enhance operational flexibility; all steps in reducing mission duration and cost.
Tomotsugu Sawai, Masami Ando, Eiichi Wakai, Kiyoyuki Shiba, Shiro Jitsukawa
Fusion Science and Technology | Volume 44 | Number 1 | July 2003 | Pages 201-205
Technical Paper | Fusion Energy - Fusion Materials | doi.org/10.13182/FST03-A334
Articles are hosted by Taylor and Francis Online.
Nickel-doped F82H alloys have been fabricated to simulate He production due to fusion neutrons in fission reactor irradiation. 1.2Ni and 1.4Ni alloys were tempered at 750°C without re-austenitisation. Expected He production in 1.4% Ni alloy irradiated in HFIR target position is about 400 appm at 40 dpa. Results of tensile and Charpy impact tests of these alloys show that their mechanical properties are similar to those of original F82H, although 0.2% proof stresses of Ni-doped alloys were 50 Mpa smaller than that of F82H. Small amount of two isotope tailored alloys including 1.4wt% Ni are also prepared using 58Ni and 60Ni. Chemical analyses and Charpy impact tests of the mock-up heat suggest that the fabrication of these small heats was successful.
