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Division Spotlight
Human Factors, Instrumentation & Controls
Improving task performance, system reliability, system and personnel safety, efficiency, and effectiveness are the division's main objectives. Its major areas of interest include task design, procedures, training, instrument and control layout and placement, stress control, anthropometrics, psychological input, and motivation.
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.”
Jan Marivoet, Eef Weetjens
Nuclear Technology | Volume 163 | Number 1 | July 2008 | Pages 74-84
Technical Paper | High-Level Radioactive Waste Management | doi.org/10.13182/NT08-A3971
Articles are hosted by Taylor and Francis Online.
This paper presents evaluations of the impact of six advanced fuel cycles, ranging from the present "once-through" fuel cycle in light water reactors to a gas-cooled fast reactor with fully recycling of all actinides, on geological disposal in a clay formation. Both the dimensions and the radiological consequences of a geological repository for the disposal of high-level radioactive waste (HLW) and spent fuel are estimated. After a 50-yr cooling time, the thermal output of the HLW arising from advanced fuel cycles is significantly lower than that of spent fuel. This allows the dimensions of the geological repository to be reduced. The impact of advanced fuel cycles on the radiological consequences in the case of the expected evolution scenario is rather limited. The maximum dose, which is expected to occur a few tens of thousands of years after the disposal of the waste, is essentially due to fission products, and their amount is approximately proportional to the heat generated by nuclear fission. An important contributor to the total dose is 129I; the amount of 129I going into a repository strongly depends on the fraction of spent fuel that is reprocessed. By considering the evolution of the radiotoxicity of the waste, it can be expected that the radiological consequences of human intrusions into a repository will be significantly lower in the case of waste arising from advanced fuel cycles.