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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.
R. A. Rydin
Nuclear Science and Engineering | Volume 50 | Number 2 | February 1973 | Pages 147-152
Technical Paper | doi.org/10.13182/NSE73-A23238
Articles are hosted by Taylor and Francis Online.
The stability of a reactor to xenon-induced spatial power oscillations is generally determined using the first harmonic flux mode alone. This assumption has been tested by including the second harmonic mode in the model and allowing cross coupling between modes. It was found that modal interaction effects are only significant for unstable situations, thus verifying that the use of a single flux mode stability criterion is an adequate approximation to the multimode case.
