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Division Spotlight
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.
Meeting Spotlight
2024 ANS Annual Conference
June 16–19, 2024
Las Vegas, NV|Mandalay Bay Resort and Casino
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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Fusion Science and Technology
Latest News
Digital control system installed at China’s Linglong One
Earlier this month, the first digital control system was put in place at Linglong One, a small modular reactor demonstration project being built at the Changjiang nuclear power plant in Hainan Province. This is the world’s first land-based commercial SMR and is controlled by China National Nuclear Power Co. Ltd., a subsidiary of the China National Nuclear Corporation (CNNC).
T. D. Bohm, M. E. Sawan, B. Smith, P. P. H. Wilson
Fusion Science and Technology | Volume 60 | Number 2 | August 2011 | Pages 698-702
Nuclear Analysis & Experiments | Proceedings of the Nineteenth Topical Meeting on the Technology of Fusion Energy (TOFE) (Part 2) | doi.org/10.13182/FST11-A12466
Articles are hosted by Taylor and Francis Online.
The ITER blanket modules (BM) are geometrically complex with many water coolant channels in a SS316 structure. Detailed mapping of nuclear heating, radiation damage, and helium production is an essential input to the design process. Previous high fidelity, high-resolution results calculated with the CAD based DAG-MCNP code revealed important heterogeneity effects on nuclear heating and helium production near steel/water interfaces. We carried out additional analysis for a simplified geometry to understand the reasons behind the observed peaking in the steel nuclear parameters at the interface with the water coolant. The results show that the peaking in nuclear heating is due to the softer neutron spectrum in the portion of steel adjacent to water which results in more gamma generation. Helium production peaking in steel adjacent to the water is due to the softer neutron spectrum which results in increased helium production primarily in B-10 impurities present in the SS316 in addition to a two-step reaction of low-energy neutrons with Ni.