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Division Spotlight
Fuel Cycle & Waste Management
Devoted to all aspects of the nuclear fuel cycle including waste management, worldwide. Division specific areas of interest and involvement include uranium conversion and enrichment; fuel fabrication, management (in-core and ex-core) and recycle; transportation; safeguards; high-level, low-level and mixed waste management and disposal; public policy and program management; decontamination and decommissioning environmental restoration; and excess weapons materials disposition.
Meeting Spotlight
Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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
August 2024
Nuclear Technology
July 2024
Fusion Science and Technology
Latest News
NRC engineers share their expertise at the University of Puerto Rico
Robert Roche-Rivera and Marcos Rolón-Acevedo are licensed professional engineers who work at the U.S. Nuclear Regulatory Commission. They are also alumni of the University of Puerto Rico–Mayagüez (UPRM) and have been sharing their knowledge and experience with students at their alma mater since last year, serving as adjunct professors in the university’s Department of Mechanical Engineering. During the 2023–2024 school year, they each taught two courses: Fundamentals of Nuclear Science and Engineering, and Nuclear Power Plant Engineering.
Ryota Katano, Masao Yamanaka, Cheol Ho Pyeon
Nuclear Science and Engineering | Volume 193 | Number 12 | December 2019 | Pages 1394-1402
Technical Paper | doi.org/10.1080/00295639.2019.1624084
Articles are hosted by Taylor and Francis Online.
The applicability of the linear combination method is experimentally confirmed through the pulsed neutron source (PNS) experiment. The linear combination method reduces the spatial higher-mode (HM) components in neutron flux distribution and provides one representative value of the measurement of the prompt neutron decay constant by the linear combination of the neutron counts obtained in the PNS experiment. The PNS experiment is conducted at Kyoto University Critical Assembly with deuteron-tritium source, and the neutron counts are measured at multiple detector positions. The experiment results show that the dependency of the prompt neutron decay constant on the masking time is dramatically reduced by the linear combination method compared to the conventional method: The HM components are eliminated not only by temporal decay but also by the linear combination. Through the experiment, the linear combination method can be a candidate for a practical measurement method of the prompt neutron decay constant reducing the spatial HM effects.