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Aerospace Nuclear Science & Technology
Organized to promote the advancement of knowledge in the use of nuclear science and technologies in the aerospace application. Specialized nuclear-based technologies and applications are needed to advance the state-of-the-art in aerospace design, engineering and operations to explore planetary bodies in our solar system and beyond, plus enhance the safety of air travel, especially high speed air travel. Areas of interest will include but are not limited to the creation of nuclear-based power and propulsion systems, multifunctional materials to protect humans and electronic components from atmospheric, space, and nuclear power system radiation, human factor strategies for the safety and reliable operation of nuclear power and propulsion plants by non-specialized personnel and more.
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June 16–19, 2024
Las Vegas, NV|Mandalay Bay Resort and Casino
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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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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).
B. S. Sandhu
Nuclear Technology | Volume 175 | Number 1 | July 2011 | Pages 118-123
Technical Paper | Special Issue on the 16th Biennial Topical Meeting of the Radiation Protection and Shielding Division / Radiation Measurements and General Instrumentation | doi.org/10.13182/NT11-A12279
Articles are hosted by Taylor and Francis Online.
The objective of this work is to present a method/technique for the determination of the effective atomic number (Zeff) of composite materials [mixed materials of many atomic numbers (Z's)]. In the present measurements, an intense beam of gamma-ray photons irradiates targets of different elements and composite materials and of varying thicknesses. The scattered radiations are detected by a properly shielded NaI(Tl) scintillation detector whose response unfolding, converting the observed pulse-height distribution to a true photon spectrum, is obtained with the help of an inverse matrix approach. This also results in the extraction of the numbers of multiple-scattered events from the thick targets. We observe that the numbers of multiple-scattered events, having the same energy as in single-scattered distribution, increase with an increase in target thickness and then saturate for a particular target thickness known as saturation thickness (depth). The saturation thickness is found to decrease when the Z of pure elements increases. A calibration curve (saturation depth versus Z of pure elements) and the measured saturation thickness values for composite materials are used to assign the respective Zeff values of these composite materials. Monte Carlo calculations also support the present experimental results.