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Reactor Physics
The division's objectives are to promote the advancement of knowledge and understanding of the fundamental physical phenomena characterizing nuclear reactors and other nuclear systems. The division encourages research and disseminates information through meetings and publications. Areas of technical interest include nuclear data, particle interactions and transport, reactor and nuclear systems analysis, methods, design, validation and operating experience and standards. The Wigner Award heads the awards program.
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Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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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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Subsequent license renewal critical to meeting U.S. climate goals
Doug Lawrence
As the United States intensifies its efforts to combat climate change and transition to a low-carbon energy future, the role of nuclear energy has never been more critical.
One key strategy in this transition is the subsequent license renewal (SLR) of our existing nuclear power plants, allowing them to operate for up to 80 years. This extension brings several significant benefits.
Continued low-carbon energy production—By extending the life of existing nuclear power plants, we ensure a steady supply of low-carbon energy, reducing our reliance on fossil fuels and helping meet our nation’s emission reduction targets. Given that nuclear power currently provides nearly 20 percent of the U.S. electricity supply and more than half of its low-carbon electricity, maintaining this capacity is vital for a sustainable energy future.
M. Kelm, E. Bohnert
Nuclear Technology | Volume 129 | Number 1 | January 2000 | Pages 123-130
Technical Paper | Radioactive Waste Management and Disposal | doi.org/10.13182/NT00-A3051
Articles are hosted by Taylor and Francis Online.
The radiation chemical reactions in gamma-irradiated 2 to 5.3 mol/l NaCl solutions were mathematically modeled by elementary reactions proceeding in parallel. The calculations showed that if all radiolytic gases could escape from the solution, only three final compounds would be formed proportional to the dose and independent from the dose rate: H2, O2, and chlorate. All other products and intermediates reached a steady-state concentration after ~1 kGy. Within certain limits, the yields of final radiolytic products were determined solely by the primary G values of H2 and H2O2. The results of the corresponding irradiation experiments carried out in glass ampoules up to ~1 MGy were in good agreement with the calculations. The simulation of the radiolysis under the condition that all gaseous products remain dissolved in the solution showed a nearly constant formation rate for hydrogen and oxygen. As opposed to this, the experiments conducted in autoclaves resulted in nearly steady-state conditions for the gases at some 100 kGy at a pressure of ~35 bars. For chlorate, the experiments and the calculation gave a constant concentration of a few micromoles per litre in 5.3 mol/l NaCl solution. A better correspondence between experiments and the simulation was achieved for the gases when the reaction model was extended for interaction of corrosion products from the autoclaves.