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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
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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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BWXT will scout potential TRISO fuel production sites in Wyoming
BWX Technologies Inc. announced today that its Advanced Technologies subsidiary has signed a cooperation agreement with the state of Wyoming to evaluate locations and requirements for siting a potential new TRISO nuclear fuel fabrication facility in the state.
Mike Sohan Singh, Lawrence Ruby
Nuclear Technology | Volume 17 | Number 2 | February 1973 | Pages 104-109
Technical Paper | Reactor | doi.org/10.13182/NT73-A31237
Articles are hosted by Taylor and Francis Online.
A significant amount of radioactivity is pro-duced via secondary nuclear reactions in the water which circulates through the core of a power reactor. The most important reactions are those which produce positron emitters, namely 16(p,α)13N and 11B(a,α)13N which are endoergic, and 18O(p,n)18F which is exoergic. The production of positron-emitting nuclides is of particular significance in the case of boiling water reactors. In such reactors, noncondensibles and steam, which are continually vented from the condenser, may contain appreciable amounts of 13N. The production rates for 18N and 18F have been calculated in the case of a 3250-MW(th) reactor using a simple model for the energy dependence of the neutron and proton fluxes and literature values of the cross sections. The resultant production rates are 2.39 × 1012 at./sec for 13N, and 7.65 × 1011 at./sec for 18F. These productions are in good agreement with measured values of the production rates when the latter are scaled up to 3250 MW(th). Nitrogen-13 release rates scale to be ∼3 mCi/sec, whereas the calculated production rate corresponds to 75 mCi/sec. The difference is probably due to the efficient removal of 13N by the anion exchanges.
