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Conference Spotlight
2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
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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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NN Asks: What did you learn from ANS’s Nuclear 101?
Mike Harkin
When ANS first announced its new Nuclear 101 certificate course, I was excited. This felt like a course tailor-made for me, a transplant into the commercial nuclear world. I enrolled for the inaugural session held in November 2024, knowing it was going to be hard (this is nuclear power, of course)—but I had been working on ramping up my knowledge base for the past year, through both my employer and at a local college.
The course was a fast-and-furious roller-coaster ride through all the key components of the nuclear power industry, in one highly challenging week. In fact, the challenges the students experienced caught even the instructors by surprise. Thankfully, the shared intellectual stretch we students all felt helped us band together to push through to the end.
We were all impressed with the quality of the instructors, who are some of the top experts in the field. We appreciated not only their knowledge base but their support whenever someone struggled to understand a concept.
J. W. Dias, D. Okrent, R. C. Erdmann
Nuclear Technology | Volume 24 | Number 1 | October 1974 | Pages 20-32
Technical Paper | Reactor | doi.org/10.13182/NT74-A31458
Articles are hosted by Taylor and Francis Online.
An explanation was sought to explain the existence of the relatively large (∼2000 Å) fission gas bubbles found in the unrestructured region of an EBR-II-irradiated mixed-oxide pin following a TREAT transient in which peak temperatures stayed below melting. Using a code like GRASS, it was found difficult to explain their existence by employing the bubble mobility values fit to experimental measurements in the region of 1500°C. A rather good fit was obtained if the greater bubble mobility that theory gives for the surface-diffusion mechanism was assumed to be applicable at higher temperatures; e.g., above 1800°C. Sensitivity studies showed that swelling is very sensitive to peak temperatures and the duration of the transient and to hydrostatic pressures in the fuel. If the surface-diffusion mechanism is applicable, considerable fuel swelling can occur due to bubble growth and coalescence. In addition, bubble drift due to temperature gradient is found to equal or exceed the effects of Brownian motion.
