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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.
W. E. Kinney, F. G. Perey
Nuclear Science and Engineering | Volume 40 | Number 3 | June 1970 | Pages 396-406
Technical Paper | doi.org/10.13182/NSE70-A20191
Articles are hosted by Taylor and Francis Online.
Measurements of neutron elastic and inelastic scattering from 56Fe have been analyzed theoretically. The shape-elastic-scattering cross sections, calculated with an optical-model potential using energy-independent parameters, added to the compound-elastic contribution obtained from a Hauser-Feshbach calculation, including width fluctuation corrections, agree reasonably well with the data from 4 to 7.6 MeV. Inelastic-scattering cross sections from the Hauser-Feshbach calculation agree well with the data from 1 to 7.6 MeV. From the known branching ratios for the decay of the levels of 56Fe, calculated gamma-ray-production cross sections are in reasonable agreement with the data. It is suggested that such calculations form the basis for consistent sets of (n,n′) and (n,n′γ) cross sections for shielding calculations.
