ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
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!
Latest Magazine Issues
Jul 2024
Jan 2024
Latest Journal Issues
Nuclear Science and Engineering
August 2024
Nuclear Technology
Fusion Science and Technology
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.”
Selena Ng, Dominique Grenèche, Bernard Guesdon, Richard Vinoche, Marc Delpech, Florence Dolci, Hervé Golfier, Christine Poinot-Salanon
Nuclear Technology | Volume 164 | Number 1 | October 2008 | Pages 13-19
Technical Paper | Icapp '06 | doi.org/10.13182/NT08-A4004
Articles are hosted by Taylor and Francis Online.
Introducing neptunium into the nuclear fuel cycle has been proposed in the past as a way to impede the diversion or the direct use of plutonium to fabricate a nuclear explosive device. This paper aims to technically analyze the industrial consequences should this proposal be implemented. Two scenarios are considered: (a) adding neptunium to fresh uranium oxide (UOX) fuel before irradiation in a light water reactor (LWR) and (b) separating neptunium together with plutonium from used UOX fuel and using this combined oxide to fabricate mixed oxide (MOX) fuel before subsequent irradiation in an LWR. In both cases, assembly calculations for a pressurized water reactor using fresh fuel doped with neptunium are presented for a wide range of neptunium proportions. The consequences on the core and fuel performance and the fuel cycle are analyzed. The analysis shows that while irradiating neptunium-doped UOX fuel can offer significant proliferation-resistance benefits because of the increased quantity of the plutonium isotope 238Pu in the discharged fuel, it entails heavy industrial penalties even at 1% Np content. The use of neptunium with MOX fuel is limited to 0.5% in order to maintain a negative void coefficient. At this proportion, it offers minimal increase in 238Pu content, and it is unlikely that detectability through gamma-ray emissions of the resulting plutonium-neptunium oxide mixture is increased. The fact that neptunium itself may pose a proliferation risk must be carefully weighed in any decision to use neptunium as a tool to increase proliferation resistance.