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Division Spotlight
Human Factors, Instrumentation & Controls
Improving task performance, system reliability, system and personnel safety, efficiency, and effectiveness are the division's main objectives. Its major areas of interest include task design, procedures, training, instrument and control layout and placement, stress control, anthropometrics, psychological input, and motivation.
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!
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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.
James J. Barker
Nuclear Science and Engineering | Volume 3 | Number 3 | March 1958 | Pages 300-312
Technical Paper | doi.org/10.13182/NSE58-A25469
Articles are hosted by Taylor and Francis Online.
The fin efficiency, defined as the ratio of the average temperature of the surface of the fin to the temperature at its base, is derived for flat and for circular fins composed of two or more materials (such as copper clad with stainless steel), for the usual conditions of constant heat transfer coefficient h and uniform ambient temperature. The exact solution is in the form of an infinite series, but the terms beyond the first are usually negligible. For most cases of interest, the fin efficiency η is shown to be approximated closely by the familiar equation η = (tanh αL)/αL, where α = and L, P, and A are, respectively, the length, perimeter, and cross-sectional area of the fin, and is the volumetric average thermal conductivity of the fin, = Σ kiAi/A where ki and Ai are the conductivity and cross-sectional area of the region i.