ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Division Spotlight
Nuclear Criticality Safety
NCSD provides communication among nuclear criticality safety professionals through the development of standards, the evolution of training methods and materials, the presentation of technical data and procedures, and the creation of specialty publications. In these ways, the division furthers the exchange of technical information on nuclear criticality safety with the ultimate goal of promoting the safe handling of fissionable materials outside reactors.
Meeting Spotlight
2024 ANS Annual Conference
June 16–19, 2024
Las Vegas, NV|Mandalay Bay Resort and Casino
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!
Latest Magazine Issues
Mar 2024
Jan 2024
Latest Journal Issues
Nuclear Science and Engineering
April 2024
Nuclear Technology
Fusion Science and Technology
February 2024
Latest News
PG&E to dredge Diablo Canyon intake system
The owners of the Diablo Canyon nuclear power plant plan to dredge a massive buildup of shoaled sediment from its seawater intake cove.
Pacific Gas and Electric spokesperson Suzanne Hosn said, “The dredging project in the Diablo Canyon marina will remove approximately 70,000 cubic yards of sediment to prevent circumstances that could impact the power plant’s cooling system. Dredging will take place for the first time since operations began because of a rapid increase in sediment.”
Hiroshi Tauchia, Michiko Ichimasa, Yusuke Ichimasa, Takahiro Shiraishi, Kenichi Morishima, Shinya Matsuura, Kenshi Komatsu
Fusion Science and Technology | Volume 41 | Number 3 | May 2002 | Pages 413-416
Biology | Proceedings of the Sixth International Conference on Tritium Science and Technology Tsukuba, Japan November 12-16, 2001 | doi.org/10.13182/FST02-A22622
Articles are hosted by Taylor and Francis Online.
A novel hyper-sensitive detection system was developed to detect Hprt-deficient mutations using Hprt deficient hamster fibroblast cells which carry a normal human X-chromosome. The system has been found to be 100-fold more sensitive for detecting mutations than the conventional system which uses an internal Hprt gene. The mutation frequency induced by 1 Gy of tritium radiation at different dose rates (0.9, 0.4, 0.04, and 0.018 Gy/h) was measured. No significant differences in mutation frequencies were observed within the range of dose rates used, suggesting that if a reverse dose-rate effect exists, it may not be observable with tritium radiation at dose rates over 0.018 Gy/h. Interestingly, molecular analysis of the Hprt locus in Hprt-deficient mutants induced by tritium showed that deletion sizes observed in the hamster cell's human X-chromosome under these conditions are much smaller in cells exposed at 0.04 (and 0.018 Gy/h) than in cells exposed at 0.9 Gy/h. This phenomenon seems to be specific for tritium radiation because it was not apparent after exposure to γ-rays. The novel hyper-sensitive detection system used here is useful for analysis of the mutagenic effects of low doses of tritium radiation delivered at low dose rates.