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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. B. Czirr, G. S. Sidhu
Nuclear Science and Engineering | Volume 58 | Number 4 | December 1975 | Pages 371-376
Technical Paper | doi.org/10.13182/NSE75-A26793
Articles are hosted by Taylor and Francis Online.
The relative energy dependence of the 235U fission cross section has been measured with respect to the (n, p) scattering reaction for neutron energies from 0.8 to 4 MeV. The Lawrence Livermore Laboratory Linac provided a pulsed source of neutrons, and energies were measured by neutron time of flight. The flux monitor consisted of a thin annular polyethylene proton radiator with a shielded recoil detector. The total error in the relative 235U (n, f) cross section is <1.5% from 0.8 to 4 MeV.
