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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.
M. S. Sadeghipour, M. N. Özişik, J. C. Mulligan
Nuclear Science and Engineering | Volume 79 | Number 1 | September 1981 | Pages 9-18
Technical Paper | doi.org/10.13182/NSE81-A19038
Articles are hosted by Taylor and Francis Online.
The transient freezing of liquid metals in laminar flow in the thermal entry region of a circular tube is investigated analytically under the assumption that the heat removal from the tube wall is by convection into an environment at a temperature lower than the freezing temperature. The variation of the solid-liquid interface as a function of time and position along the tube is determined. The effects of Biot number and the difference between the freezing and the ambient temperatures on the length of freeze-free zone are examined.
