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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
International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering (M&C 2025)
April 27–30, 2025
Denver, CO|The Westin Denver Downtown
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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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Dragonfly, a Pu-fueled drone heading to Titan, gets key NASA approval
Curiosity landed on Mars sporting a radioisotope thermoelectric generator (RTG) in 2012, and a second NASA rover, Perseverance, landed in 2021. Both are still rolling across the red planet in the name of science. Another exploratory craft with a similar plutonium-238–fueled RTG but a very different mission—to fly between multiple test sites on Titan, Saturn’s largest moon—recently got one step closer to deployment.
On April 25, NASA and the Johns Hopkins University Applied Physics Laboratory (APL) announced that the Dragonfly mission to Saturn’s icy moon passed its critical design review. “Passing this mission milestone means that Dragonfly’s mission design, fabrication, integration, and test plans are all approved, and the mission can now turn its attention to the construction of the spacecraft itself,” according to NASA.
Yue Guan, Fei Li, Mohammad Modarres, David Bessette, Marino Dimarzo
Nuclear Technology | Volume 133 | Number 3 | March 2001 | Pages 269-289
Technical Paper | Reactor Safety | doi.org/10.13182/NT01-A3174
Articles are hosted by Taylor and Francis Online.
This paper presents an application of a thermal-hydraulic and probabilistic assessment (TH-PA) method to the Westinghouse Advanced Passive 600-MW(electric) (AP600) design. The Westinghouse probabilistic risk assessment (PRA) was used for screening probabilistically important scenarios only. Corresponding integrated-behavior-logic diagrams (IBLDs) were constructed, and accident trajectories were developed. Small cold-leg break accidents and direct vessel injection line break accidents were analyzed. Scenarios in which TH phenomena may play a major role, and which have the highest frequency of core uncovery and heatup were identified. Important insights were obtained. Application of this method to the AP600 has shown its value in prioritizing safety issues. Its application to the AP600 has been further ensured by (a) relying on the Westinghouse PRA to model functional/logical relationships of the components/systems, (b) using a peer review approach to validate the most important IBLDs, and (c) comparing accident trajectories with the U.S. Nuclear Regulatory Commission-sponsored AP600 experimental results. While this application has demonstrated effectiveness of the method in accident scenario screening for the AP600, the TH-PA method has broader potential.
