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Division Spotlight
Materials Science & Technology
The objectives of MSTD are: promote the advancement of materials science in Nuclear Science Technology; support the multidisciplines which constitute it; encourage research by providing a forum for the presentation, exchange, and documentation of relevant information; promote the interaction and communication among its members; and recognize and reward its members for significant contributions to the field of materials science in nuclear technology.
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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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?
Dong H. Nguyen
Nuclear Technology | Volume 49 | Number 1 | June 1980 | Pages 80-91
Technical Paper | Nuclear Power Reactor Safety / Reactor | doi.org/10.13182/NT80-A32509
Articles are hosted by Taylor and Francis Online.
A methodology has been constructed to assess the uncertainty in an output consequence calculated by a large code, due to the uncertainties in input data. A sensitivity analysis was first applied to the code to screen the input variables, leaving only those most affecting the output consequences. The variations of these effective inputs were prescribed by an effective combination of statistical designs, which accounted for the linear, quadratic, and two-factor interaction effects of the inputs on the calculated consequence. A key result of the methodology was the probability density function of the consequence of interest, expressed as a distribution of the Pearson family. The confidence level in calculating a consequence was readily obtained from this distribution function. The methodology was applied to the computer code MELT-IIIA, a major code for the analysis of the hypothetical core disruptive accident in liquidmetal fast breeder reactors, and the confidence level in predicting the time of initial pin failure during a transient overpower accident in the fast test reactor was determined. The sensitivity of this confidence level to the uncertainties of the input data was also shown, thereby establishing the need for well-documented statistical properties of data used in nuclear reactor safety analysis.