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Meeting Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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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Jun 2025
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Nuclear Science and Engineering
August 2025
Nuclear Technology
Fusion Science and Technology
July 2025
Latest News
The U.S. Million Person Study of Low-Dose-Rate Health Effects
There is a critical knowledge gap regarding the health consequences of exposure to radiation received gradually over time. While there is a plethora of studies on the risks of adverse outcomes from both acute and high-dose exposures, including the landmark study of atomic bomb survivors, these are not characteristic of the chronic exposure to low-dose radiation encountered in occupational and public settings. In addition, smaller cohorts have limited numbers leading to reduced statistical power.
Daniel L. P. Watson, Ronald Daryll E. Gatchalian, Hui-Yu Hsieh, Pramatha Bhat, Pavel V. Tsvetkov
Nuclear Technology | Volume 211 | Number 1 | April 2025 | Pages S49-S61
Research Article | doi.org/10.1080/00295450.2024.2423144
Articles are hosted by Taylor and Francis Online.
A fast spectrum surface fission power microreactor for lunar deployment is conceptualized and modeled utilizing the primary design drivers of the SpaceX Falcon Heavy mass constraints, a 10-year operation lifetime, high-assay low-enrichment uranium fuel enrichment, a 100-kW(electric) system power rating, and a Stirling conversion cycle. The reactor is demonstrated to remain subcritical during launch accidents resulting in oceanic submersion and throughout control system failures in the highest reactivity positions. Neutron shielding requirements for the high-leakage core were satisfied with 40 cm of natural enrichment LiH at 100% solid density, while photon shielding for the reactor at full power exceeded the in the National Aeronautics and Space Administration scope of work design requirement 18960 DR-3 of 5 rem·y−1 at rates of 30 rem·y−1 for a 1-km standoff. A conversion cycle was approximated using an experimental carbon-carbon thermal radiator coupled with published analytical and experimental results for free-piston Stirling systems.