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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.
L. Bridwell, Shawn Bucy
Nuclear Science and Engineering | Volume 37 | Number 2 | August 1969 | Pages 224-227
Technical Paper | doi.org/10.13182/NSE69-A20681
Articles are hosted by Taylor and Francis Online.
A mathematical model for the calculation of kinetic-energy spectra of fragments from the spontaneous fission of 252Cf has been developed. This model predicts the spectra of these fragments after transmission through any absorber whose thickness and composition are known. The model may be applied to other fissioning elements with minor modifications. Agreement between calculated and experimentally observed peak positions agree to within 5%. The energy shifts due to an absorber may be calculated to within 25% for the thicknesses of foils used.
