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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. A. Halbleib, Sr., M. R. Scott
Nuclear Science and Engineering | Volume 37 | Number 2 | August 1969 | Pages 271-277
Technical Paper | doi.org/10.13182/NSE69-A20687
Articles are hosted by Taylor and Francis Online.
Extensive calculations have been carried out for neutron production from the 3H(d,n)4He, 3H(p,n)3He, and 2H(d,n)3He reactions using hydrated titanium targets. Both thin and totally stopping targets have been considered for ion energies up to 5 MeV. By using the appropriate ion energy, production angle, and reaction, and allowing an energy spread of 10%, it is found that one can obtain neutron current densities of the same order of magnitude with energies from 0 to 22 MeV except for the gap between 8 and 12 MeV. Above 1 MeV variation of all pertinent neutron production characteristics with target loading ratio are found to be essentially the same regardless of reaction type, ion energy, or production angle. Total neutron yields are also calculated along with an example neutron-energy spectrum.