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Smarter waste strategies: Helping deliver on the promise of advanced nuclear
At COP28, held in Dubai in 2023, a clear consensus emerged: Nuclear energy must be a cornerstone of the global clean energy transition. With electricity demand projected to soar as we decarbonize not just power but also industry, transport, and heat, the case for new nuclear is compelling. More than 20 countries committed to tripling global nuclear capacity by 2050. In the United States alone, the Department of Energy forecasts that the country’s current nuclear capacity could more than triple, adding 200 GW of new nuclear to the existing 95 GW by mid-century.
Masaki Ozawa, Yuichi Sano, Chisako Ohara, Takamichi Kishi
Nuclear Technology | Volume 130 | Number 2 | May 2000 | Pages 196-205
Technical Paper | Radioactive Waste Management and Disposal | doi.org/10.13182/NT00-A3087
Articles are hosted by Taylor and Francis Online.
Electrolytic extraction of noble metals from nitric acid media was investigated. The largest deposition yield was obtained for Pd, supported by its large rate constants. Rate constants of RuNO3+ and ReO4- were, however, smaller than that of Pd2+; their yield can be improved under high cathode current supply in lower nitric acid concentration. Rather high apparent activation energy was observed for the deposition of RuNO3+. Peculiar masking or synergistic effects in their electrodeposition behaviors might be due to mutual interaction of RuNO3+, Pd2+ with ReO4- in nitric acid solution. Sufficiently different redissolution potentials for deposited metals indicate their fractional recovery by anode processing.Mediatory electrochemical oxidation (MEO) was investigated for the mineralization of waste OD[iB]CMPO (hereafter CMPO) by burning its bulky hydrocarbon moiety under the existence of various kinds of metal ions. Only Ag2+/+ offered high-current efficiency up to 75%, fairly exceeding that by direct electrooxidation. Redox coupling characterized by a simple electron transfer, Mm+ + ne- <=> M(m-n)+ provided high E0, will act exactly as an active mediator. As for the destruction paths for CMPO by MEO, cleavage between carbonyl C and N of amide moiety was of principal importance. The coupling of Co3+/2+ is also recommended because of hydraulic advantages.
