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
Isotopes & Radiation
Members are devoted to applying nuclear science and engineering technologies involving isotopes, radiation applications, and associated equipment in scientific research, development, and industrial processes. Their interests lie primarily in education, industrial uses, biology, medicine, and health physics. Division committees include Analytical Applications of Isotopes and Radiation, Biology and Medicine, Radiation Applications, Radiation Sources and Detection, and Thermal Power Sources.
Meeting Spotlight
Conference on Nuclear Training and Education: A Biennial International Forum (CONTE 2025)
February 3–6, 2025
Amelia Island, FL|Omni Amelia Island Resort
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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Nuclear Science and Engineering
February 2025
Nuclear Technology
January 2025
Fusion Science and Technology
Latest News
Reboot: Nuclear needs a success . . . anywhere
The media have gleefully resurrected the language of a past nuclear renaissance. Beyond the hype and PR, many people in the nuclear community are taking a more measured view of conditions that could lead to new construction: data center demand, the proliferation of new reactor designs and start-ups, and the sudden ascendance of nuclear energy as the power source everyone wants—or wants to talk about.
Once built, large nuclear reactors can provide clean power for at least 80 years—outlasting 10 to 20 presidential administrations. Smaller reactors can provide heat and power outputs tailored to an end user’s needs. With all the new attention, are we any closer to getting past persistent supply chain and workforce issues and building these new plants? And what will the election of Donald Trump to a second term as president mean for nuclear?
As usual, there are more questions than answers, and most come down to money. Several developers are engaging with the Nuclear Regulatory Commission or have already applied for a license, certification, or permit. But designs without paying customers won’t get built. So where are the customers, and what will it take for them to commit?
J. A. Shields, Jr., K. J. Longua
Nuclear Technology | Volume 28 | Number 3 | March 1976 | Pages 471-481
Technical Paper | Reactor | doi.org/10.13182/NT76-A31527
Articles are hosted by Taylor and Francis Online.
A 5-ft segment of 2¼ Cr—1 Mo ferritic steel pipe has been removed from the Experimental Breeder Reactor II (EBR-II) steam system for metallurgical evaluation after ∼90 000 h of service in the temperature range of 580 to 820°F (304 to 438°C). Optical metallography, instrumented impact testing, tensile testing, Auger electron spectroscopy, and scanning electron fractography have been performed to assess the capability of the material to perform its function in the future. Service in the EBR-II steam system has resulted in additional precipitation of fine uniformly dispersed carbides throughout the micro-structure. As a result of these changes, room temperature yield and tensile strengths are reduced 23.3 and 4.5%, respectively. Excellent toughness is observed on the upper shelf of the Charpy V-notch impact energy curve. No evidence of embrittlement phenomena was observed. The results indicate that the 2¼ Cr—1 Mo steel employed in the EBR-II system has not suffered significant degradation in metallurgical properties and should perform well in the future.
