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NRC proposes changes to its rules on nuclear materials
In response to Executive Order 14300, “Ordering the Reform of the Nuclear Regulatory Commission,” the NRC is proposing sweeping changes to its rules governing the use of nuclear materials that are widely used in industry, medicine, and research. The changes would amend NRC regulations for the licensing of nuclear byproduct material, some source material, and some special nuclear material.
As published in the May 18 Federal Register, the NRC is seeking public comment on this proposed rule and draft interim guidance until July 2.
J. Halperin, G. D. O'Kelley, J. H. Oliver, J. E. Bigelow, and J. T. Wiggins
Nuclear Science and Engineering | Volume 90 | Number 3 | July 1985 | Pages 298-303
Technical Paper | doi.org/10.13182/NSE85-A17770
Articles are hosted by Taylor and Francis Online.
Integral neutron capture and neutron fission cross sections have been measured for the 276-day 254gEs. Thermal cross sections and resonance integrals were evaluated using a cadmium filter technique. Capture cross sections were determined from alpha-particle spectrum measurements following neutron irradiations with cobalt flux monitors. Fission cross sections were measured using fission track detection techniques with 233U monitors. The fission cross-section values compared favorably with an absorption cross-section determination from a burnout experiment of 253Es-254Es. The integral neutron capture and fission cross sections determined for 254gEs are: = 28.3 ± 2.5 and Ic = 18.2 ± 1.5 b, and = 1970 ± 200 and IF = 1200 ± 250 b.
