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Remembering ANS member Gil Brown
Brown
The nuclear community is mourning the loss of Gilbert Brown, who passed away on July 11 at the age of 77 following a battle with cancer.
Brown, an American Nuclear Society Fellow and an ANS member for nearly 50 years, joined the faculty at Lowell Technological Institute—now the University of Massachusetts–Lowell—in 1973 and remained there for the rest of his career. He eventually became director of the UMass Lowell nuclear engineering program. After his retirement, he remained an emeritus professor at the university.
Sukesh Aghara, chair of the Nuclear Engineering Department Heads Organization, noted in an email to NEDHO members and others that “Gil was a relentless advocate for nuclear energy and a deeply respected member of our professional community. He was also a kind and generous friend—and one of the reasons I ended up at UMass Lowell. He served the university with great dedication. . . . Within NEDHO, Gil was a steady presence and served for many years as our treasurer. His contributions to nuclear engineering education and to this community will be dearly missed.”
Wallace Davis, Jr.
Nuclear Science and Engineering | Volume 14 | Number 2 | October 1962 | Pages 159-168
Technical Paper | doi.org/10.13182/NSE62-A28115
Articles are hosted by Taylor and Francis Online.
The distribution of 0–8 M HNO3 between aqueous and 5–100 vol % solutions of TBP in Amsco 125-82 has been measured and used to obtain a quantitative description of this extraction process. Up to ∼5 M aqueous HNO3, a limit arbitrarily chosen because of uncertainties in HNO3 activity coefficients, the data of this report at any particular concentration of TBP in Amsco are accurately described by the equation log [(HNO3)org/{[HNO3]aq(3.75493-(HNO3)org)}] = A + B (HNO3)org, where parentheses refer to concentrations, square brackets to activities, and subscripts org and aq to organic and aqueous phases. The antilogarithms of the constants A for the six TBP-diluent solutions studied can be described as a linear function of , the sum of the mole fractions, and , of water and TBP in the acid-free water-saturated organic phase. These antilogarithms were interpreted as the product K1mγT, where K1m is the thermodynamic equilibrium constant for the extraction reaction and γT is the mean activity coefficient of TBP and TBP·H2O in the acid-free, water-saturated organic phase. As the concentration of TBP in Amsco 125-82 increases from 0 to 100%, K1mγT, in molal units, varies from 0.2 to 1.5. The quantities B of the above equation are proportional to while the product B(HNO3)org is interpreted as log γTN, where γTN is the mean activity coefficient of the species TBP·HNO3 and TBP·HNO3·H2O. The organic phase water and acidity values are consistent with formation of the complexes TBP·H2O, TBP·HNO3, TBP·HNO3·H2O, and TBP·2HNO3.
