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Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
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
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
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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?
Shunsuke Uchida, Motoaki Utamura, Hideo Yusa, Hideo Maki
Nuclear Technology | Volume 40 | Number 1 | August 1978 | Pages 79-88
Technical Paper | Fuel | doi.org/10.13182/NT78-A26701
Articles are hosted by Taylor and Francis Online.
To improve the efficiency of in-core wet sipping leaker detection, a warm water injection method was developed. The method was characterized by pouring warm water into the channel box through the sipper cap and replacing all the water originally present with the poured water. Basic experiments were performed to determine the efficiency of the method. Mockup experiments were undertaken to confirm this and to ascertain the effects of operational conditions on the efficiency. These were done by the sipping procedures by means of a facility that included a full-scale 8 × 8 simulated fuel assembly. It was demonstrated that (a) the efficiency of detection for bottom leaks increased about a hundred times over the commonly used method, and (b) the increase in efficiency came from flattening the temperature distribution along the axial direction and exciting the natural convection flow in the whole assembly to promote the fission product transfer. Optimal operational conditions for the method were also proposed as follows:
