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Fusion Science and Technology
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Hash Hashemian: Visionary leadership
As Dr. Hashem M. “Hash” Hashemian prepares to step into his term as President of the American Nuclear Society, he is clear that he wants to make the most of this unique moment.
A groundswell in public approval of nuclear is finding a home in growing governmental support that is backed by a tailwind of technological innovation. “Now is a good time to be in nuclear,” Hashemian said, as he explained the criticality of this moment and what he hoped to accomplish as president.
R.M. Brown, G.L. Ogram, F.S. Spencer
Fusion Science and Technology | Volume 14 | Number 2 | September 1988 | Pages 1165-1169
Tritium Release Experiment | doi.org/10.13182/FST88-A25296
Articles are hosted by Taylor and Francis Online.
A release of 3.54 TBq of HT was conducted over an experimental field at Chalk River consisting of a 200 m diameter grassland and a further 200 m stretch of coarse sand having sparse vegetation. Tritiated hydrogen was released at a steady rate over a 30 minute period. Atmospheric sampling for HTO and HT was done using molecular sieve and Pd-loaded molecular sieve traps. HTO/HT ratios observed during the release ranged from 1.37×10−5 at 5 m to 7.0×10−4 at 400 m distance from the release point indicating an effective oxidation rate of about 1.5%/h, confirming results obtained in a preliminary experiment in 1986. Oxidation truly in the atmosphere must be much slower than this effective rate since HTO observed in the plume could be attributed primarily to evaporation of tritium oxidized in the surface soil of the field. The distribution of HT in the plume was similar in trend to that calculated from the Gaussian Plume Model but observed concentrations were about one half of the calculated values.