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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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Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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
Oklo completes end-to-end demonstration of advanced fuel recycling
Oklo Inc. has announced that it has completed the first end-to-end demonstration of its advanced fuel recycling process as part of an ongoing $5 million project in collaboration with Argonne and Idaho National Laboratories. Oklo’s goal: scaling up its fuel recycling capabilities to deploy a commercial-scale recycling facility that would increase advanced reactor fuel supplies and enhance fuel cost effectiveness for its planned sodium fast reactors.
Hilbert Christensen
Nuclear Technology | Volume 109 | Number 3 | March 1995 | Pages 373-382
Technical Paper | Material | doi.org/10.13182/NT95-A35086
Articles are hosted by Taylor and Francis Online.
The production of radiolytic species in a pressurized water reactor has been calculated for various initial hydrogen and boron concentrations. The concentration of oxidants decreases with increasing hydrogen concentration, but the decrease is <20% when [H2] is increased from 5 to 50 Ncm3/kg (N refers to normal conditions, i.e., 0°C, 1.013 bar). The concentration of oxidants is reduced ∼35% when the boron concentration is reduced from 340 to 0 ppm. The reduction is caused by a decrease in linear energy transfer (LET) of the mixed radiation. An increase in LET results in lower radical yields and higher molecular yields. For a hydrogen concentration of 15 Ncm3/kg and a boron concentration of 800 ppm, the highest H2O2 concentration —17 ppb —is found at the highest dose rate in the fuel channel. The highest oxygen concentration — 0.7ppb — is found at the entrance to the downcomer. The highest concentration —0.5 ppb —is found in the fuel channel. Of these species, may be expected to have the highest rate constant in oxidation processes. At a hydrogen concentration of 5 Ncm3/kg, the oxidant concentrations are only slightly higher than the preceding values. A decrease in hydrogen concentration is supposed to be beneficial in decreasing the risk of primary water stress corrosion cracking of the steam generator alloy 600 material.