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Division Spotlight
Fusion Energy
This division promotes the development and timely introduction of fusion energy as a sustainable energy source with favorable economic, environmental, and safety attributes. The division cooperates with other organizations on common issues of multidisciplinary fusion science and technology, conducts professional meetings, and disseminates technical information in support of these goals. Members focus on the assessment and resolution of critical developmental issues for practical fusion energy applications.
Meeting Spotlight
Nuclear and Emerging Technologies for Space (NETS 2025)
May 4–8, 2025
Huntsville, AL|Huntsville Marriott and the Space & Rocket Center
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
June 2025
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Latest News
First concrete marks start of safety-related construction for Hermes test reactor
Kairos Power announced this morning that safety-related nuclear construction has begun at the Oak Ridge, Tenn., site where the company is building its Hermes low-power test reactor. Hermes, a scaled demonstration of Kairos Power’s fluoride salt–cooled, high-temperature reactor technology, became the first non–light water reactor to receive a construction permit from the Nuclear Regulatory Commission in December 2023. The company broke ground at the site in July 2024.
Wenyu Cheng, Jie Liang, Mingjun Zhang, Fei Wei, Jinglin Li, Xiaochong Xue, Youshi Zeng, Ke Deng, Qin Zhang, Wei Liu
Nuclear Science and Engineering | Volume 197 | Number 7 | July 2023 | Pages 1534-1544
Technical Paper | doi.org/10.1080/00295639.2022.2158020
Articles are hosted by Taylor and Francis Online.
Large amounts of tritium will inevitably be produced during operation from the Thorium Molten Salt Reactor (TMSR) fueled by lithium salt, which is detrimental to the human body. Therefore, it is necessary to evaluate the radiation dose of the generated tritium. The tritium production, emission, and radiation dose of TMSRs were estimated by numerical calculation. According to this study, a 2-MW(thermal) TMSR produces 3.33E+14 Bq·yr−1 of tritium, discharges 2.42E+13 Bq·yr−1 of tritium, and causes 1.06 μSv·yr−1 of radiation dose. A 30-MW(thermal) TMSR produces 5.00E+15 Bq·yr−1 of tritiu.m, discharges 3.62E+14 Bq·yr−1 of tritium, and causes 2.02 μSv·yr−1 of radiation dose. A 2250-MW(thermal) TMSR produces 3.75E+17 Bq·yr−1 of tritium, discharges 2.77E+16 Bq·yr−1 of tritium, and causes 79 μSv·yr−1 of radiation dose. The radiation dose of TMSRs is much less than 1 mSv·yr−1, which is the dose limit for internal recruitment in China. It is determined that TMSRs are safe for humans regarding tritium hazard.
