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Division Spotlight
Accelerator Applications
The division was organized to promote the advancement of knowledge of the use of particle accelerator technologies for nuclear and other applications. It focuses on production of neutrons and other particles, utilization of these particles for scientific or industrial purposes, such as the production or destruction of radionuclides significant to energy, medicine, defense or other endeavors, as well as imaging and diagnostics.
Meeting Spotlight
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
Vogtle-3 shuts down for valve issue
One of the new Vogtle units in Georgia was shut down unexpectedly on Monday last week for a valve issue that has since been investigated and repaired. According to multiple local news outlets, Georgia Power reported on July 17 that Unit 3 was back in service.
Southern Company spokesperson Jacob Hawkins confirmed that Vogtle-3 went off line at 9:25 p.m. local time on July 8 “due to lowering water levels in the steam generators caused by a valve issue on one of the three main feedwater pumps.”
Adimir dos Santos, Jamil Alves do Nascimento
Nuclear Technology | Volume 140 | Number 3 | December 2002 | Pages 233-254
Technical Paper | Fission Reactors | doi.org/10.13182/NT02-A3336
Articles are hosted by Taylor and Francis Online.
An Integral Lead Reactor (ILR) concept is proposed to be used in developing countries. The ILR is an association of the best characteristics of the American Integral Fast Reactor and of the Russian Lead-Cooled Reactor. The reactor is started with U-Zr and shifts cycle-by-cycle to the U-TRU-Zr fuel. Besides electricity generation an association of the ILR and a chemical heat pump for high-temperature industrial processes is idealized.Homogeneous reactor cores based on the American and Russian experiences on fast reactor technology have been designed for conception evaluation. The main core parameters are evaluated in the first and in the equilibrium cycles as a function of the pin diameter in the 6.35- to 10.4-mm range, pin pitch-to-diameter (p/d) ratio in the 1.308 to 1.495 range, and reactor power in the 300- to 1500-MW(electric) range. To mitigate the transient-overpower accident, a requisite is to have a burnup reactivity (kBu) < eff in the equilibrium cycle. The use of enriched uranium results in a poor core conversion ratio, and this fuel must be replaced as quickly as possible by the generated plutonium. In the equilibrium cycle the burnup reactivity goal is achieved for core power of 300 MW(electric) using a pin diameter of 10.4 mm and p/d of 1.308. The lead void reactivity is negative for reactor power lower than 750 MW(electric). The Doppler effect is small, as expected in a fast reactor loaded with metallic fuel. The fast fluence limit of 4.0 × 1023 n/cm2 is a restrictive parameter of the ILR, and to obtain the burnup of 100 GWd/t HM, a core optimization is needed. All the base accident evaluation and the optimization of the ILR are still to be performed.