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Remembering Joseph M. Hendrie
Joseph M. Hendrie
To those of us who knew Joe, even prior to his appointment as chair of the Nuclear Regulatory Commission, it is an understatement to say that he was a larger-than-life member of the nuclear science and technology enterprise. He was best known to the broader community for two major accomplishments: the design and construction of the High Flux Beam Reactor (HFBR) at Brookhaven National Laboratory and the creation of the standard review plan (SRP) for the U.S. Atomic Energy Commission.
In addition to the products of these endeavors becoming major fundaments to their respective communities, they were uniquely Joe. The safety analysis report for the HFBR was written essentially single-handedly by him. This was true of the SRP as well, which became the key safety review document for the NRC as it performed safety reviews for the growing number of power reactor applications in the United States. His deep technical knowledge of nuclear engineering and his extraordinary management skills made this possible.
L. Rodrigo
Fusion Science and Technology | Volume 28 | Number 3 | October 1995 | Pages 1067-1072
Analysis and Accountancy | Proceedings of the Fifth Topical Meeting on Tritium Technology In Fission, Fusion, and Isotopic Applications Belgirate, Italy May 28-June 3, 1995 | doi.org/10.13182/FST95-A30548
Articles are hosted by Taylor and Francis Online.
The Jesse effect — the effect of common gaseous impurities on the ionization yield in noble gases, — was investigated as a function of the impurity concentration. Experiments were conducted using a specially constructed parallel-plate ionization chamber. A solid 63Ni, pure-beta emitter was used as the radiation source. Results showed a sharp increase in the ionization yield in He at low impurity concentrations (<∼1000 ppm) followed by a plateau at high concentrations (>∼4000 ppm) for all common impurity gases investigated. At the plateau, the ionization yield was found to be approximately 40–50% higher than the value obtained with ultra-high-pure He. According to these data, the magnitude of the tritium concentration measurement error associated with ionization chambers can be as high as 40–50% if common impurities are present in the He carrier. Since tritium itself is a Jesse effect-causing impurity in He, the calibration factor for a given ionization chamber will depend on the tritium concentration in He up to ∼350 TBq/m3. Only small changes in the ionization yield were observed for Ar. Therefore, common impurities will not impede the measurement of tritium in Ar with ionization chambers.