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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.
Jingshang Zhang, Yinlu Han, Ligang Cao
Nuclear Science and Engineering | Volume 133 | Number 2 | October 1999 | Pages 218-234
Technical Paper | doi.org/10.13182/NSE98-100
Articles are hosted by Taylor and Francis Online.
The double-differential cross sections of outgoing neutrons and alpha particles of the 12C(n,xn) and 12C(n,x) reactions are measured. A new nuclear reaction model for light nuclei is proposed to analyze the measured data. Because of a strong recoil effect in light nucleus reactions, the energy balance is strictly taken into account. Based on this new method, the LUNF code is developed to calculate all kinds of reaction cross sections and energy-angular distributions for the n + 12C reaction in the 4.8- to 20-MeV energy region. The reaction channel of (n,n'3) may proceed via a number of different reaction channels, as sequential particle emissions and two-body separation. The comparisons of the calculated results with the measured experimental data indicate that the model calculations are successful for outgoing neutrons. Also, kerma factors derived from the calculated results are compared with the measurements.
