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Conference on Nuclear Training and Education: A Biennial International Forum (CONTE 2025)
February 3–6, 2025
Amelia Island, FL|Omni Amelia Island Resort
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A series of firsts delivers new Plant Vogtle units
Southern Nuclear was first when no one wanted to be.
The nuclear subsidiary of the century-old utility Southern Company, based in Atlanta, Ga., joined a pack of nuclear companies in the early 2000s—during what was then dubbed a “nuclear renaissance”—bullish on plans for new large nuclear facilities and adding thousands of new carbon-free megawatts to the grid.
In 2008, Southern Nuclear applied for a combined construction and operating license (COL), positioning the company to receive the first such license from the U.S. Nuclear Regulatory Commission in 2012. Also in 2008, Southern became the first U.S. company to sign an engineering, procurement, and construction contract for a Generation III+ reactor. Southern chose Westinghouse’s AP1000 pressurized water reactor, which was certified by the NRC in December 2011.
Fast forward a dozen years—which saw dozens of setbacks and hundreds of successes—and Southern Nuclear and its stakeholders celebrated the completion of Vogtle Units 3 and 4: the first new commercial nuclear power construction project completed in the U.S. in more than 30 years.
James J. Gumbleton, Farno L. Green, William J. Mayer
Nuclear Science and Engineering | Volume 7 | Number 4 | April 1960 | Pages 313-319
Technical Paper | doi.org/10.13182/NSE60-A25722
Articles are hosted by Taylor and Francis Online.
A single cylinder engine with a radioactive iron piston ring was used to observe transient wear during break-in, cold start-up, and changes in speed. Small changes in engine speed and load under some conditions produce more wear during a given time interval than steady-state operation at high speeds and loads. Our studies show that measuring transient wear is more difficult than measuring steady-state wear partially because of insufficient counting rates. Errors in measurements due to counting statistics were analyzed. High counting rates will be necessary for reproducible measurements of fast transient wear such as that which occurs with an automatic transmission during acceleration. When premium lubricating oils are used, the piston rings should have specific activities of 3.0 to 30.0 mc/gm of Fe59 which require irradiation in reactor fluxes of approximately 7 × 1012 to 7 × 1013 n/cm2/sec. Neutron fluxes of this order have not been available in existing reactors for parts as large as automotive piston rings. However, informative measurements of slow transient wear can be made uniquely with available specific activities.
