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Nuclear Installations Safety
Devoted specifically to the safety of nuclear installations and the health and safety of the public, this division seeks a better understanding of the role of safety in the design, construction and operation of nuclear installation facilities. The division also promotes engineering and scientific technology advancement associated with the safety of such facilities.
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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!
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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.
Yuh-Ming Ferng
Nuclear Science and Engineering | Volume 125 | Number 3 | March 1997 | Pages 348-361
Technical Paper | doi.org/10.13182/NSE97-A24280
Articles are hosted by Taylor and Francis Online.
The loop seal connecting a steam generator and a reactor coolant pump has been shown to result in the early depression of core liquid level and the temporary heatup of fuel during a postulated loss-of-coolant accident for a typical pressurized water reactor. It is very crucial in the experimental and analytical domain to provide a comprehensive understanding of the physical phenomena occurring in the loop seal. A new approach is proposed to realistically simulate the flow behaviors occurring in the loop seal through the use of three-dimensional, first-principle equations and control-volume-based finite differencing methods. Several important phenomena can be reasonably captured by the current model, which includes the flow stratification, interface wavy phenomenon, initiation of a slug flow, oscillation of liquid in the horizontal pipe, and blowing out of the residual liquid. The trend of residual liquid level with the superficial velocity is predicted to reasonably match the test data Special attention on the problem of the loop seal is focused on the loop-seal clearing that is strongly associated with the temporary core depression. This phenomenon can also be simulated by the current model as demonstrated in the calculated results. The predicted threshold velocity agrees with the experimental data and the analytical results from appropriate correlations.