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Nuclear Criticality Safety
NCSD provides communication among nuclear criticality safety professionals through the development of standards, the evolution of training methods and materials, the presentation of technical data and procedures, and the creation of specialty publications. In these ways, the division furthers the exchange of technical information on nuclear criticality safety with the ultimate goal of promoting the safe handling of fissionable materials outside reactors.
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2024 ANS Winter Conference and Expo
November 17–21, 2024
Orlando, FL|Renaissance Orlando at SeaWorld
Standards Program
The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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Latest News
Federal watchdog says NRC needs to address more radiological risks, including “dirty bombs”
A new report from the U.S. Government Accountability Office finds that the Nuclear Regulatory Commission has not taken the steps needed to address the potential economic and societal radiological risks that could arise from a “dirty bomb.”
R. D. M. Garcia
Nuclear Science and Engineering | Volume 157 | Number 2 | October 2007 | Pages 225-235
Technical Note | doi.org/10.13182/NSE07-A2724
Articles are hosted by Taylor and Francis Online.
Special formulas for an efficient computation of first-flight escape and transmission probabilities in X-Y-Z geometry are presented. The approach used to derive these formulas is based on rearranging and grouping similar terms in the general three-dimensional formulas reported in a previous work by the author. When applied to fine grids, the new formulas are found to be orders of magnitude more efficient than the original ones. Numerical results are reported for test cases defined by regular hexahedra of various optical dimensions, including one where partitions are used to define the source and sink zones in the calculations of the escape and transmission probabilities.