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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. Laggiard, J. Runkel, D. Stegemann
Nuclear Science and Engineering | Volume 120 | Number 2 | June 1995 | Pages 124-135
Technical Paper | doi.org/10.13182/NSE95-A24113
Articles are hosted by Taylor and Francis Online.
The vibration and impacting of an instrument tube against the surrounding fuel boxes in a boiling water reactor (BWR) was studied by means of a three-dimensional, one-modal model. The transfer of the tube displacements to neutron fluctuations of the fission chamber-instrument tube assemblies was calculated by employing the adjoint function technique and utilizing a two-dimensional, two-group diffusion theory. The results were used to interpret the particular measured noise spectra of an instrument tube in the 1300-MW Gundremmingen C BWR. The root-mean-square of the displacements was estimated from the experimental neutron data.
