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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.
E. E. MORRIS, A. B. CHILTON, A. F VETTER
Nuclear Science and Engineering | Volume 56 | Number 2 | February 1975 | Pages 171-178
Technical Paper | doi.org/10.13182/NSE75-A26655
Articles are hosted by Taylor and Francis Online.
Buildup factors for energy deposition in water and aluminum and for exposure in concrete are presented for monoenergetic, point isotropic gamma-ray sources. The buildup fac. tors were evaluated using the method of moments and are tabulated for energies from 0.03 to 10 MeV and distances out to 50 mean -free-paths from the source. Empirical representations of these buildup factors are developed using Berger’s formula. Fitting parameters are tabulated for each material as a function of source energy.
