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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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Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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
NRC’s David Wright visits the Hill and more NRC news
Wright
The Nuclear Regulatory Commission is in the spotlight today for three very different reasons. First, NRC Chair David Wright was on the Hill yesterday for his renomination hearing in front of the Senate’s Environment and Public Works Committee. Second, the NRC released its updated milestone schedules according to the Nuclear Energy Innovation and Modernization Act (NEIMA) and the executive orders signed by President Trump last month; and third, as reported by Reuters on Tuesday, 28 former NRC officials have condemned the dismissal of Commissioner Hanson earlier this month.
Gundra Kondayya, Aditi Ray
Nuclear Science and Engineering | Volume 154 | Number 2 | October 2006 | Pages 215-222
Technical Paper | doi.org/10.13182/NSE06-A2627
Articles are hosted by Taylor and Francis Online.
The Compton current arising due to strong neutron and gamma pulses in air is estimated by detailed modeling of coupled neutron-gamma-electron transport. A method has been developed to generate the electron source from the space-time-dependent gamma fluxes. Transport of electrons is treated by a simple model based on the Goudsmit-Saunderson approach. The energy spectra of the interacting particles are investigated at different times. The effect of the multienergy group structure of the particles involved on Compton current has been analyzed. The role of the secondary gamma in prolonging the current waveform is discussed.
