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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.
Meeting Spotlight
Conference on Nuclear Training and Education: A Biennial International Forum (CONTE 2025)
February 3–6, 2025
Amelia Island, FL|Omni Amelia Island Resort
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
When your test capsule is the test: ORNL’s 3D-printed rabbit
Oak Ridge National Laboratory has, for the first time, designed, printed, and irradiated a specimen capsule—or rabbit capsule—for use in its High Flux Isotope Reactor (HFIR), the Department of Energy announced on January 15.
F. Rahnema, G. C. Pomraning
Nuclear Science and Engineering | Volume 84 | Number 4 | August 1983 | Pages 313-319
Technical Paper | doi.org/10.13182/NSE83-A15451
Articles are hosted by Taylor and Francis Online.
Expressions are developed for the first-order change in a linear functional of the neutron flux due to a perturbation in the exterior boundary of a fixed source problem. The perturbation formulas are derived in transport theory and its diffusion approximation, and several numerical examples are given.
