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
Robotics & Remote Systems
The Mission of the Robotics and Remote Systems Division is to promote the development and application of immersive simulation, robotics, and remote systems for hazardous environments for the purpose of reducing hazardous exposure to individuals, reducing environmental hazards and reducing the cost of performing work.
Meeting Spotlight
2024 ANS Winter Conference and Expo
November 17–21, 2024
Orlando, FL|Renaissance Orlando at SeaWorld
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
Oct 2024
Jul 2024
Latest Journal Issues
Nuclear Science and Engineering
November 2024
Nuclear Technology
Fusion Science and Technology
Latest News
Are Civil Nuclear Credits still relevant? DOE is asking nuclear operators for input
Interest in new reactor deployments and existing reactor life extensions is surging, encouraged by production and investment tax credits from the Inflation Reduction Act and led by electricity demand from tech companies. Last week alone saw Google and Amazon investing in Kairos Power’s fluoride salt–cooled reactor and X-energy’s high-temperature, gas-cooled reactor, respectively. On October 16, the DOE’s Office of Clean Energy Demonstrations issued a solicitation to award $900 million to support the initial domestic deployment of light water–cooled small modular reactor technologies.
S. F. Su, Y. Orechwa, H. Henryson II
Nuclear Technology | Volume 52 | Number 3 | March 1981 | Pages 370-382
Technical Paper | Fission Reactor | doi.org/10.13182/NT81-A32711
Articles are hosted by Taylor and Francis Online.
Two-dimensional multigroup space-time kinetics calculations with thermal-hydraulic feedback were performed for 1000- and 1800-MW(electric) homogeneous and heterogeneous liquid-metal fast breeder reactors. The initiating transient was due to the asymmetric withdrawal of a single control rod. It was found that the point kinetics model can, in many cases, be used for predicting integral reactor characteristics. For accurate predictions of local reactor conditions, space-time kinetics calculations are needed. In the case of both homogeneous and heterogeneous cores, for design basis reactivity insertions with scram, smaller reactivity insertion rates will lead to a greater fuel and cladding temperature rise than large reactivity insertion rates. Heterogeneous cores, because of their inherently greater power shape sensitivity, show a larger temperature rise than the homogeneous cores despite the fact that the transient is of much shorter duration because of an earlier reactor trip due to a lower negative Doppler feedback.