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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.”
Alexey Yu. Stankovsky, Vladimir V. Artisyuk, Masaki Saito
Nuclear Technology | Volume 142 | Number 3 | June 2003 | Pages 306-317
Technical Paper | Accelerators | doi.org/10.13182/NT03-A3392
Articles are hosted by Taylor and Francis Online.
This paper addresses radiological issues that are unique for accelerator-driven neutron generation with much attention given to the limited area in a spallation target that encloses the propagation of high-energy cascade reactions. At certain beam options, a cascade of neutron-producing processes leaves the alpha-emitting spallation products belonging to the class of rare earths, like 62146Sm, 64148Gd, 64150Gd, and 66154Dy, whose overall toxicity in a lead target might overrun the alpha-emitting activation product 84210Po. To suppress their accumulation, the concept of a heterogeneous liquid-metal spallation module is proposed. This concept envisages the separation of a spallation target into two zones with specifically designated roles of neutron production and neutron multiplication. The main idea is to localize the proton-induced neutron production in a material with Z number <60 so as to exclude accumulation of problematic rare earths. Radioactive 50126Sn from fission products is considered as a material for this zone. Such a configuration not only lifts the great deal of spallation product burden from the lead target but also helps in eliminating the most troublesome long-lived fission ash, and what is important is that, compared to the bulk lead target, there is no appreciable detrimental effect on the overall neutron production.