ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Division Spotlight
Thermal Hydraulics
The division provides a forum for focused technical dialogue on thermal hydraulic technology in the nuclear industry. Specifically, this will include heat transfer and fluid mechanics involved in the utilization of nuclear energy. It is intended to attract the highest quality of theoretical and experimental work to ANS, including research on basic phenomena and application to nuclear system design.
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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Nuclear Science and Engineering
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Latest News
IEA report: Challenges need to be resolved to support global nuclear energy growth
The International Energy Agency published a new report this month outlining how continued innovation, government support, and new business models can unleash nuclear power expansion worldwide.
The Path to a New Era for Nuclear Energy report “reviews the status of nuclear energy around the world and explores risks related to policies, construction, and financing.”
Find the full report at IEA.org.
Donald J. Dudziak
Nuclear Science and Engineering | Volume 27 | Number 2 | February 1967 | Pages 328-337
Technical Paper | doi.org/10.13182/NSE67-A18272
Articles are hosted by Taylor and Francis Online.
Effective two-group gamma-ray spectra have been determined for thermal-neutron capture in sodium, nickel, type-304 stainless steel, and tantalum, as well as for 235 U prompt-fission gamma rays. A seven-group compilation of capture gamma rays was used as the basis for this study. Absorbed dose (uncollided and builtup) in several materials was calculated for varying thicknesses of several intervening shielding materials. The resulting function for each combination was reduced to two exponential functions over a range of 0 up to 560 g/cm2. Effective spectra were determined to be as follows: sodium, 6.09 MeV/capture at 5.5 MeV and 5.74 MeV/capture at 2.0 MeV; nickel, 8.33 MeV/capture at 8.0 MeV and 1.62 MeV/capture at 2.0 MeV; type-304 SS, 5.86 MeV/capture at 8.0 MeV and 1.95 MeV/capture at 2.0 MeV; tantalum, 3.76 MeV/capture at 4.0 MeV and 2.88 MeV/capture at 1.5 MeV; prompt fission, 2.31 MeV/fission at 4.0 MeV and4.92 MeV/fission at 1.25 MeV. These effective spectra reproduce, to within an average absolute deviation of less than 7.4%, the absorbed doses (uncollided and builtup) calculated by the detailed spectra, within the ranges of areal density considered.
