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Radiation Protection & Shielding
The Radiation Protection and Shielding Division is developing and promoting radiation protection and shielding aspects of nuclear science and technology — including interaction of nuclear radiation with materials and biological systems, instruments and techniques for the measurement of nuclear radiation fields, and radiation shield design and evaluation.
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2025 ANS Annual Conference
June 15–18, 2025
Chicago, IL|Chicago Marriott Downtown
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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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Fusion Science and Technology
Latest News
Webinar: MC&A and safety in advanced reactors in focus
Towell
Russell
Prasad
The American Nuclear Society’s Nuclear Nonproliferation Policy Division recently hosted a webinar on updating material control and accounting (MC&A) and security regulations for the evolving field of advanced reactors.
Moderator Shikha Prasad (CEO, Srijan LLC) was joined by two presenters, John Russell and Lester Towell, who looked at how regulations that were historically developed for traditional light water reactors will apply to the next generation of nuclear technology and what changes need to be made.
S. W. Yoon, A. C. England, W. C. Kim, H. Yonekawa, J. G. Bak, B. H. Park, J. Kim, K. I. You, Y. M. Jeon, S. H. Hahn, Y. K. Oh, J. Chung, K. D. Lee, H. J. Lee, J. A. Leuer, and N. W. Eidietis
Fusion Science and Technology | Volume 65 | Number 3 | May 2014 | Pages 372-383
Technical Paper | doi.org/10.13182/FST13-706
Articles are hosted by Taylor and Francis Online.
KSTAR has a nonlinear magnetic material, INCOLOY® alloy 908 (Incoloy), in toroidal field and poloidal field (PF) coil systems. The effect of Incoloy on the magnetic configuration for the plasma initiation was investigated with systematic magnetic field measurements, finite element model (FEM) calculations, and in situ measurements of the magnetic properties. The profile of the vertical field near the field-null center was measured with a vertically movable electron beam (e-beam) probe and Hall sensor arrays in addition to pickup coils in the vacuum vessel. The measured profiles of the additional fields from Incoloy in the PF coils are in good agreement with the FEM calculations. In a typical KSTAR startup configuration, the effect of Incoloy is significant. First, it degrades the connection length significantly due to an additional vertical field in the field-null region, and second, it changes the radial and vertical stabilities by modifying the radial gradient of the vertical field. Initial up-down asymmetry measurements of the vertical fields showed very small static error fields from the PF coils. Calculations suggest that the main sources of the measured downshift of the plasma column are asymmetric eddy currents in the cryostat.
