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
Aerospace Nuclear Science & Technology
Organized to promote the advancement of knowledge in the use of nuclear science and technologies in the aerospace application. Specialized nuclear-based technologies and applications are needed to advance the state-of-the-art in aerospace design, engineering and operations to explore planetary bodies in our solar system and beyond, plus enhance the safety of air travel, especially high speed air travel. Areas of interest will include but are not limited to the creation of nuclear-based power and propulsion systems, multifunctional materials to protect humans and electronic components from atmospheric, space, and nuclear power system radiation, human factor strategies for the safety and reliable operation of nuclear power and propulsion plants by non-specialized personnel and more.
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
Aug 2024
Jan 2024
Latest Journal Issues
Nuclear Science and Engineering
October 2024
Nuclear Technology
Fusion Science and Technology
August 2024
Latest News
New laws offer nuclear industry incentives for existing power plant uprates
This year, the U.S. nuclear industry received a much-needed economic boost that could help preserve operating nuclear power plants and incentivize upgrades that extend their lifespan and power output.
Signed into law in 2022, the Inflation Reduction Act offers production tax credits (PTCs) for existing nuclear power plants and either PTCs or investment tax credits (ITCs) for new carbon-free generation. These credits could make power uprates—increasing the maximum power level at which a commercial plant may operate—a much more appealing option for utilities.
R. W. Bowring, C. L. Spigt
Nuclear Science and Engineering | Volume 22 | Number 1 | May 1965 | Pages 1-13
Technical Paper | doi.org/10.13182/NSE65-A19756
Articles are hosted by Taylor and Francis Online.
Stability and burnout natural-circulation tests on an electrically heated 7-rod cluster were carried out to obtain data relevant to the Halden II reactor. The object of the tests was to measure the maximum channel powers obtainable without burnout at pressures up to 28 atm and various inlet subcoolings. The test-section heat flux was essentially uniform, but local heat-flux peaks were introduced at hot patches to probe burnout. It was found that at 28 atm and up to 6°C inlet subcooling, a channel power of nearly 600 kW could be reached without burnout or instability; increasing the subcooling further, reduced the burnout power. The instability channel power threshold was investigated and found to decrease with decreasing pressure. In addition, the natural-circulation inlet velocity was measured at various constant pressures and values of inlet-subcooler heat removal, as a function of channel power up to and in the hydraulic instability region. Flow oscillations of about 1-sec period were observed and recorded together with the burnout detector signal at trip under these conditions.