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
Accelerator Applications
The division was organized to promote the advancement of knowledge of the use of particle accelerator technologies for nuclear and other applications. It focuses on production of neutrons and other particles, utilization of these particles for scientific or industrial purposes, such as the production or destruction of radionuclides significant to energy, medicine, defense or other endeavors, as well as imaging and diagnostics.
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
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.
R. E. Rexroad, M. A. Schmoke H. J. Tiller, A. Foderaro, L. Degelman, G. Kowal
Nuclear Science and Engineering | Volume 20 | Number 1 | September 1964 | Pages 66-79
Technical Paper | doi.org/10.13182/NSE64-A19276
Articles are hosted by Taylor and Francis Online.
An analysis was made of shielding data obtained from an experiment designed to determine the wall attenuation properties against residual gamma radiation of a simple 12 ft × 12 ft × 8 ft concrete blockhouse for three different wall thicknesses (48, 93.7 and 139 lb/ft2). Roof thickness was chosen so that radiation scattered through the roof could be considered negligible. A plane source was simulated by successively positioning point isotropic Co60 and Cs137 sources on the ground surrounding the structure. The experiment was designed to obtain experimental evidence for the validity of certain aspects of L. V. Spencer's Theory of Structure Shielding against Fallout Radiation as presented in NBS Monograph 42. From analysis of a total of 9700 measurements, a point-to-point kernel was developed which permits calculation of the dose rate at any point within the structure from a point isotropic source on the ground outside. Doses calculated from the kernel differ less than 10 to 50 per cent from the experimental doses, except at extreme angles of incidence where the error can exceed a factor of 2. A computer program has been written which integrates the point-to-point kernel over infinite or finite rectangular areas. The kernel was integrated over an infinite area and results were compared with those obtained from Spencer's theory. It was found that the difference in reduction factor D/D0 from ‘experimental’ point-to-point kernel data and Spencer's theory did not exceed 40 per cent. Free-field (unshielded detector) dose rates obtained from integrating the point-to-point kernel over Co60 and Cs137 infinite-plane isotropic sources have been compared with those obtained experimentally by Rex-road and Schmoke. The difference was found to be 9 and 7 per cent respectively for the Co60 and the Cs137 source fields.
